nvent UIT2, NGC-UIT2-EX, NGC-UIT2-ORD-R, NGC-UIT2-RS232 Installation Manual

NGC-30 / UIT2

Installation manual

Contents

Section I – Overview ................................................................................................................................. 3

1.1 Introduction .............................................................................................................................. 3

Section 2 – Installation and Wiring ........................................................................................................... 4

2.1 Introduction .............................................................................................................................. 4

2.2 Initial Inspection ...................................................................................................................... 4

2.3 Operating Environment ........................................................................................................... 4

2.4 Installation Location ................................................................................................................ 5

2.5 Mounting Procedures .............................................................................................................. 5

2.6 Wiring Procedures ................................................................................................................... 5

2.6.1 Incoming Power With Distribution System ................................................................... 5

2.6.2 Outgoing Power With Distribution System ................................................................... 6

2.6.3 Incoming/Outgoing Power Without Distribution Panel Board .................................... 6

2.6.4 Incoming Rtd Wiring ....................................................................................................... 7

2.6.5 Connecting The RS-485 Device Network...................................................................... 7

2.7 Connections for Remote Annunciation — NGC-UIT2-EX ..................................................... 12

2.8 RS-232, RS-485, or Ethernet Remote Port Connections to a Host Computer .................... 13

2.8.1 RS-232 Serial Connections .......................................................................................... 13

2.8.2 RS-485 Serial Connections .......................................................................................... 13

2.8.3 Ethernet Connections ................................................................................................... 14

2.9 Testing the NGC-30 System ..................................................................................................14

Section 3 – nVent RAYCHEM NGC-30 Components and Operation ........................................................ 15

3.1 User Interface Terminal (NGC-UIT2)..................................................................................... 15

3.1.1 Multiple Ngc-Uit2 Models ............................................................................................ 15

3.1.2 Ngc-Uit2 Local And Remote Network Connections ................................................... 16

3.1.3 RS-485 Conguration Switches ..................................................................................17

3.1.4 Ngc-Uit2-Ex Reset Switch ............................................................................................ 17

3.2 Card Rack Module (NGC-30-CRM/-CRMS) and

Current Transformer Module (NGC-30-CTM) ........................................................................ 18

3.3 Card Rack (NGC-30-CR) ........................................................................................................ 19

3.4 Voltage Monitoring Module (NGC-30-CVM) – Optional ..................................................... 19

3.5 Remote Monitoring Module (RMM2) – Optional ................................................................. 20

3.6 Power Line Carrier Interface Module (PLI) – Optional ........................................................ 21

3.7 The Remote Monitoring Module for Digital Inputs (RMM-DI) ............................................. 22

Section 4 – Appendices .......................................................................................................................... 23

Appendix A – Replacement Component Ordering Guide .......................................................... 23

Appendix B – Panel Specications.............................................................................................24

Appendix C – NGC-30-CRM/-CRMS Specications ................................................................... 27

Appendix D – NGC-UIT2 Specications ..................................................................................... 28

Appendix E – Device Address ..................................................................................................... 29

Appendix F – RAYCHEM RMM-DI Technical Specication ....................................................... 30

2 | nVent.com

SECTION I – OVERVIEW

1.1 INTRODUCTION

The nVent RAYCHEM NGC-30 is a fully wired and tested control and monitoring system used
with electric heat tracing. This manual provides information pertaining to the installation,
operation, testing, adjustment, and maintenance of all components of the RAYCHEM NGC-30
System. For information about how to program the RAYCHEM NGC-30, see the RAYCHEM
NGC-30 Programming Guide (H58186)

A typical RAYCHEM NGC-30 is made up of at least a User Interface Terminal (NGC-UIT2),
one Card Rack (NGC-30-CR), one Card Rack Module with connectors
(NGC-30-CRM or NGC-30-CRMS), and one Current Transformer Module (NGC-30-CTM).
Optional Remote Monitoring Module for Temperatures (RMM2), Power Line Carrier Interface
(PLI), RMC modules, Remote Monitoring Module for Digital Inputs (RMM-DI) and Voltage
Monitoring Module (NGC-30-CVM) may be used.

The information in this document coincides with the specific releases of firmware
(listed in Table 1.1) for the User Interface Terminal (NGC-UIT2) and Card Rack Module
(NGC-30-CRM/-CRMS) components. As nVent releases new firmware to significantly modify
or enhance any of these components, new documentation will accompany these releases.
To ensure that the correct documentation is being used for your particular version of the
RAYCHEM User Interface Terminal (NGC-UIT2), compare the firmware version number of
each component against the number listed in the table below. As subsequent changes are
made, supplements to this document will be included in manuals shipped after the firmware is
released. Supplements will make specific reference to the operation or functional change.

Copies of this manual and updates may be downloaded from the Literature section of
nVent.com.

Table 1.1 Component versions

Component versions

Component Version number

NGC-CRM/CRMS V1.0X

NGC-UIT2-EX V2.1.X or V4.X

RMM2 V1.0X

RMM-DI V1.0

IMPORTANT WARNINGS AND NOTES

The following icons are used extensively throughout this manual to alert you to important
warnings

the unit. Be sure to read and follow them carefully.

that affect safety and to important notes that affect the proper operation of

nVent.com | 3

SECTION2 – INSTALLATION AND WIRING

2.1 INTRODUCTION

WARNING:

Electrical Hazard! Ensure all personnel involved in installation, servicing, and programming are
qualified and familiar with electrical equipment, its ratings, and proper practices and codes.
Multiple voltages and signal levels may be present during the installation, operation, and
servicing of this product. Do not power the product until the safety provisions outlined in this
section have been observed.

This section includes information regarding the initial inspection, preparation for use,
and wiring instructions for the components of the RAYCHEM NGC-30.

2.2 INITIAL INSPECTION

Inspect the shipping container for damage. If the shipping container or cushioning material
is damaged, it should be kept until the contents of the shipment have been verified for
completeness and the equipment has been checked mechanically and electrically. Procedures
for installing the RAYCHEM NGC-30 are given in this section. If the shipment is incomplete,
mechanically damaged, defective in any way, or does not pass the electrical performance tests,
notify the nearest nVent representative. If the shipping container is damaged, or the cushioning
material shows signs of stress, notify the carrier as well as your nVent representative. Keep the
shipping materials for the carrier’s inspection.

2.3 OPERATING ENVIRONMENT

There are three types of User Interface Terminals (UIT2s) available with the RAYCHEM
NGC-30 panel, as shown in Table 2.1. The term “NGC-UIT2” in this document refers to any of
the available NGC-UIT2s, regardless of which model is actually installed.

NGC-30 User Interface Terminals (UIT2s)
UIT2 type Area classification Usage

NGC-UIT2-EX Nonhazardous (Unclassified) Locations

Hazardous Locations
Class 1 Div. 2, Groups A, B, C & D

Class I Zone 2

NGC-UIT2-ORD-R Nonhazardous (Unclassified) Locations

The NGC-UIT2-ORD-R must be installed in a
nonhazardous, indoor or outdoor location.

The NGC-UIT2-ORD-R connects to NGC-30
panels using RS-485 communication wiring.

TYPE 4
(Indoors or

Outdoors)

TYPE 4
(Indoors or

Outdoors)

WARNING:

Some wiring configurations will use more than one power source. All power sources must be
de-energized prior to performing any maintenance on a card rack module or its heating circuit.
The operating environment should be within the limitations specified for the RAYCHEM
NGC-30 components as outlined in Appendices B, C, and D.

4 | nVent.com

2.4 INSTALLATION LOCATION

Power wiring diagram

Incomming service

2.5 MOUNTING PROCEDURES

2.6 WIRING PROCEDURES

The wide Operating Temperature range of the RAYCHEM NGC-30 permits installation in almost
any convenient location. Considerations should include: expected atmospheric conditions
(weather), accessibility for maintenance and testing, the location of existing conduits, and
hazardous location rating. Ambient temperature conditions may affect load current ratings

.

CAUTION:

Always be sure that the intended location is classified as an area that the product is approved
for use in as defined by Article 500 of the National Electrical Code and/or Part I, Section 18 of
the Canadian Electrical Code.

Each RAYCHEM NGC-30 panel includes a set of “As Built” drawings that have been engineered,
designed, and drafted based upon the model number and any special requirements that
were requested when ordering. The “As Built” drawings include an elevation/layout (with
bill of materials) and schematics. If these drawings are not included, contact your nVent
Representative and request the “As Built” drawings for your panel. Upon request, an electronic
copy of these drawings can be provided.

For mounting the panel, locate the elevation and layout drawing which includes a bill of
materials. The enclosure mounting information will be provided on the “As Built” drawings.

Refer to the “As Built” drawings for wiring of incoming/outgoing power and incoming RTD
connections. The RAYCHEM NGC-30 panel can be purchased with, or without, a distribution
panel board.

2.6.1 INCOMING POWER WITH DISTRIBUTION SYSTEM

Main Circuit Breaker
Locate the main circuit breaker in the panel by using the supplied elevation/layout drawing,

and connect per the associated schematic drawings. Depending upon the size and type of
main circuit breaker and voltage loss calculations, use the appropriate size and number of
wires to connect directly to the main circuit breaker, and panel board neutral and ground bus in

thepanel.

Three phase, 4 wire, 60 Hz

ØA ØB

ØC

Main circuit
breaker
3-pole

Panelboard
neutral bus

Panelboard

ground bus

Fig. 2.1 Main circuit breaker wiring

Branch Circuit Breakers
The branch circuit breakers are pre-wired to the contactors or solid- state relays in the panel,

sono further incoming power wiring is required.

nVent.com | 5

2.6.2 OUTGOING POWER WITH DISTRIBUTION SYSTEM

e

EMR or

Branch

Load Power

Heat trace

** Represents HTC circuit number 1-40

Single pole C.B.

Tw

* Reference panel drawing for terminal block number

Load Power Terminal Blocks
Locate the outgoing heater terminal blocks using the supplied elevation/layout drawing, and

connect per the associated schematic drawings. Depending upon the size of the branch circuit
breaker and voltage loss calculations, use the appropriate size and number of wires to connect
from the panel’s Load Power Terminal Blocks to the heat-trace power junction box.

LCGF

CTM
connector

SSR

contacts

Terminal

TB- (Y)

13
14
15
16
17

Block

TB*

CRM

junction

box

Heat trace cabl

circuit

breaker

X

Cable-CT**

* Reference panel drawing for terminal block number

Fig. 2.2 Heat trace power wiring diagram

2.6.3 INCOMING/OUTGOING POWER WITHOUT DISTRIBUTION PANEL BOARD

Line Power Terminal Blocks
Locate the incoming power terminal blocks in the panel using the supplied elevation/layout

drawings and connect per the associated schematic drawing. Depending upon size and type of
the remotely located branch circuit breakers, use the appropriate size and number of wires to
connect directly to the Line Power Terminal Blocks.

Load Power Terminal Blocks
Locate the outgoing power terminal blocks in the panel using the supplied elevation/layout

drawings and connect per the associated schematic drawing. Depending upon size and type of
the remotely located branch circuit breakers, use the appropriate size and number of wires to
connect from the Load Power Terminal Blocks to the heater’s power connection box.

Line Power

Terminal Blocks

CB

LP

*

N

TB*

L1

C

–L1

–N

*

*

*

*

N

*

–T1

–N

CTM–

CT GF CT

Terminal Blocks

*

Load Power

TB*

T1

N

Heat trace cable

Fig. 2.3 Single pole and two pole circuit breaker wiring diagrams

6 | nVent.com

o pole C.B.

CB

*

LP

LP

Line Power

Terminal Blocks

TB*

L1

L2

Load Power

CTM–

C

–L1

–L2

*

*

*

*

*

–T1

–T2

CT GF CT

Terminal Blocks

*

TB*

T1

T2

Heat trace cable

2.6.4 INCOMING RTD WIRING

DR

* Reference panel drawing for terminal block number

Device must be mounted in series.

Branching of the network is not allowed.

Nonhazardous and Hazardous Location Installations Wired to Terminal Block in Panel
The RTD wiring from the NGC-30-CRM/-CRMS have been pre-wired to RTD terminals. The field

RTD wiring (3-wire with shield) will be terminated by the installer at the RTD terminal blocks.
Refer to the Installation Drawings for the RTD Termination Schedule.

See Fig. 2.4 on page 8 for a typical RTD installation.
IMPORTANT: To meet the requirements for hazardous location installations, a separate RTD

terminal block must be installed and wired to the NGC-30-CRM/-CRMS RTD terminal connector.

NGC-30-CRM/-CRMSNGC-30-CRM/-CRMS Panel Rear

Card Rack ModuleCard Rack Module

CRMCRM

11
22
33
44

WHWH
REDRED
REDRED

OPENOPEN

(+)(+)

(–)(–)

Panel Rear

Terminal Block

Terminal Block

RTD-RTD-

TB*TB*

WHWH
REDRED
REDRED

SHLDSHLD

WHWH
REDRE
REDRED

SHLDSHLD

RTD-RTD-

Field

Field

Wiring

Wiring

EDRED

(+)(+)(–)(–)

REDREDWHWH

CHASSIS GRDCHASSIS GRD

Fig. 2.4 Typical RTD installation

2.6.5 CONNECTING THE RS-485 DEVICE NETWORK

The NGC-UIT2 display is typically linked to a network of RAYCHEM NGC-30-CRMs/-CRMSs and
optional nVent RAYCHEM RMM2s and PLIs. These are connected to the RAYCHEM NGC-UIT2
using an RS-485 communication cable (shielded, two conductor, twisted pair). The following
illustration shows how the RS-485 network for the NGC-UIT2 system may be configured.

(Terminated devices are shown in gray)

NGC-UIT2-EX

NGC-CRM/-CRMS

MSBLSB

TB 12

TB 7TB 6

NGC-CRM/-CRMS

MSBLSB

TB 12

TB 7TB 6

PLI

HN/HGABCN

RMM2

Jumper

RMM-DI

TB 19

TB 19

110

.

220
.

0

TB 1TB 2TB 3TB 4TB 5

1 2 3

TB 13 TB 14 TB 15 TB 16 TB 17

TB 1TB 2TB 3TB 4TB 5

1 2 3

TB 13 TB 14 TB 15 TB 16 TB 17

Norm

Mixed

S

6

S2 S1

6

S

Connect no more than two RS-485 cables to any device.

RMM-DI

RMM2

0

PLI

HN/HGABCN

NGC-UIT2-EX

NGC-CRM/-CRMS

TB 12

NGC-CRM/-CRMS

0

0-9

+

S+

36

TB 12

NGC-CRM/-CRMS

TB 12

MSB LSB

TB 7TB 6

MSB LSB

TB 7TB 6

MSB LSB

TB 7TB 6

110
.

220
.

TB 19

TB 19

TB 19

Norm

Mixed

TB 1TB 2TB 3TB 4TB 5

1 2 3

TB 13 TB 14 TB 15 TB 16 TB 17

TB 1TB 2TB 3TB 4TB 5

1 2 3

TB 13 TB 14 TB 15 TB 16 TB 17

TB 1TB 2TB 3TB 4TB 5

1 2 3

TB 13 TB 14 TB 15 TB 16 TB 17

S

6

S2 S1

6

S

0

0-9

+

S+

36

NGC-UIT2-EX

Fig. 2.5 RS-485 network configuration for the NGC-UIT2 system

nVent.com | 7

In order for the RS-485 network to work properly, you must enable the termination resistor for
the first and last device. The devices shown in gray in Fig. 2.5 represent the devices for which
you must enable the termination resistors. The devices that are not grayed out represent the
devices for which you should not enable the termination resistors.

Optional RMM2 Installed in the Field
Refer to the RMM2 Installation Instructions (H56848) for field installation instructions.

You must connect a RS-485 connection from the RMM2 to an open RS-485 connector on the
NGC-30-CRM/-CRMS board in the RAYCHEM NGC-30 panel. To make this connection, a
pre-wired terminal block has been provided in the RAYCHEM NGC-30 panel. Connect the
RS-485 wire from the RMM2 to TB (per the panel drawing) while maintaining the correct
polarity. If the RMM2 is the first or last device in the RS-485 network, connect the
J17 termination jumper to pins 1 and 2. If the RMM2 is not the first or last device in the
RS-485 network, connect the J17 termination jumper to pins 2 and 3.

NGC-30 Panel

6

5

4

3

S

S

(+)

2

BK

(–)

1

WH

RS-485

1

S

+

2

BK

–

3

WH

TB*

NGC-30-CRM/-CRMS #1NGC-UIT2

* Reference panel drawing for terminal block number

1

S

2

BK

3

WH

TB*

RS-485 RS-485

1

S

+

2

BK

–

3

WH

TB*

NGC-30-CRM/-CRMS #8

1

S

2

BK

3

WH

TB*

TB*

4

S

S

+

+

5

BK

BK

–

–

6

WH

WH

RMM2

Jumper

0

Default position (for all RMM2
units in network except first or last one)

J17

123

LN LN

Out

DI Wiring: Output: min 12V @ 10mA

DI -1

Termination mode
(first or last RMM2/RMM-DI in network)

J17

123

230V:

IN

115V:

~

1.5 VA

DI -2 DI -3 DI -4 DI -5 DI -6 DI -7 DI -8 DI -9 DI -10DI -11DI -12

Fig. 2.6 RMM2 RS-485 field wiring and termination jumper setting

DI-13 DI-14 DI-15

ADDR

H

ADDR

L

RS 485

8 | nVent.com

Last PLI in network

NGC-30 Panel

6

5

4

3

S

(+)

2

(–)

1

Optional PLI Installed in the Panel

Refer to the PLI Installation Instructions (H56850). You must connect a RS-485 connection
from the PLI to an open RS-485 connector on the NGC-30-CRM/-CRMS board in the RAYCHEM
NGC-30 panel. IF the PLI is the first or last device in the RS-485 network, remove the shorting
block jumper location J2 from 1 and 2 and place it across pins 2 and 3.

9

S2 S1

* Reference panel drawing for terminal block number

110

.

220
.

1

1

S

BK

WH

RS-485

S

+

BK

–

WH

NGC-30-CRM/-CRMS #1NGC-UIT

Default position (for all PLI
units in network except first or last one)

J2

2

3

TB*

123

S

2

BK

3

WH

TB*

RS-485 RS-485

1

1

S

+

BK

–

WH

S

2

2

BK

3

3

WH

TB*

TB*

NGC-30-CRM/-CRMS #8

Termination mode
(first or last PLIin network)

J2

123

HN/H GABCN

Norm

Mixed

S

J2

123

5

6

5

RS-485 connections

+ ––

+

S

S

36

Fig. 2.7 PLI RS-485 panel wiring and termination jumper setting

NGC-UIT2 Installation

The NGC-UIT2-EX will come pre-wired into any NGC-30 panel. Exceptions exist when a remote
mount NGC-UIT2 (NGC-UIT2-ORD-R) is used or the NGC-30 panel is wired to the NGC-UIT2
in another panel. Fig. 2.8 shows the wiring for the NGC-UIT2-ORD-R and Fig. 2.10 shows the
wiring between a separate panel and the NGC-UIT2.

nVent.com | 9

NGC-UIT2-ORD-R Installation

NGC-30-CRM/-CRMS

Normal

position

End of Line

position

3

2

1

3

2

1

You must make an RS-485 connection from the NGC-UIT2-ORD-R to the NGC-30-CRM/-CRMS
board in the NGC-30 panel. To make this connection, a pre-wired terminal block has been
provided in the NGC-UIT2-ORD-R and in the NGC-30 panel. Connect the RS-485 wire from TB3
in the NGC-UIT2-ORD-R and the other end to TB* in the NGC-30 panel maintaining the correct
polarity. If the NGC-UIT2-ORD-R and/or the NGC-30-CRM/-CRMS is the first or last device in the
RS-485 network, see Fig. 2.9 and Table 3.1 for details on how to terminate the RS-485 network.

* Reference panel drawing for terminal block numbers.

NGC-UIT2-ORD-R

SR 9 876

43521

RS-485+

RS-485–

Field

Remote

RS-485 Ports

RS-485

NGC-30 Panel #1

TB*

3

S

S

+

+

2

BK

BK

–

–

1

WH

WH

* Reference panel drawing for terminal block number

1

1

S

+

BK

–

WH

NGC-30-CRM/-CRMS #1

S

2

2

BK

3

3

WH

TB*

TB*

RS-485

S

+

BK

–

WH

TB*

NGC-30-CRM/-CRMS #8

1

1

2

2

3

3

TB*

Fig. 2.8 NGC-UIT2 RS-485 field wiring

The following figure shows the RS-485 termination options for the NGC-30-CRM/-CRMS.

MSB LSB

TB 1 TB 2 TB 3 TB 4 TB 5

1 2 3

TB 12

TB 7 TB 6

TB 19

TB 13 TB 14 TB 15 TB 16 TB 17

Fig. 2.9 Termination of RS-485 network for NGC-30-CRM/-CRMS

10 | nVent.com

End of Line (EOL) Jumper

If this device (NGC-30-CRM/-CRMS) is
the first or last device in the RS-485
network, move the J1 jumper from
terminals 2 & 3 to terminals 1 & 2.

NGC-30 Panel with NGC-UIT2 Connected to an NGC-30 Panel without NGC-UIT2

This wiring is used when a single UIT2 in one panel is the central point for multiple
NGC-30 panels. Because the NGC-UIT2 can handle up to 260 heat tracing circuits, it can be
cost effective to use one NGC-UIT2 for multiple panels. An RS-485 connection must be made
from the panel that has the NGC-UIT2 (panel #1) installed to the NGC-30-CRM/-CRMS board
in NGC-30 (panel #2) that does not have the NGC-UIT2 installed (see Fig. 2.10). To make this
connection, a pre-wired terminal block has been provided in the panel #1 and in panel #2.
Connect the RS-485 wire from TB* in panel #1 and the other end to TB* in panel #2 maintaining
the correct polarity. If the NGC-30-CRM/-CRMS is the first or last device in the RS-485 network,
see Fig. 2.9 and Table 3.1 for details on how to terminate the RS-485 network.

* Reference panel drawing for terminal block numbers.

NGC-30 Panel #1

6

* Reference panel drawing for terminal block number

5

4

1

3

S

S

(+)

2

BK

(–)

1

WH

RS-485

NGC-30-CRM/-CRMS #1NGC-UIT2

1

S

+

BK

–

WH

S

2

2

BK

3

3

WH

TB6

TB6

RS-485 RS-485

1

1

S

+

BK

–

WH

S

2

2

BK

3

3

WH

TB6

TB6

NGC-30-CRM/-CRMS #8

RS-485

NGC-30 Panel #2
without UIT installed

TB*

1

S

S

+

+

2

BK

BK

–

–

3

WH

WH

RS-485

1

1

S

+

BK

–

WH

S

2

2

BK

3

3

WH

TB6

TB6

NGC-30-CRM/-CRMS #1

RS-485

NGC-30-CRM/-CRMS #8

Fig. 2.10 RS-485 field wiring between two RAYCHEM NGC-30 panels

TB*

4

S

S

+

+

5

BK

BK

–

–

6

WH

WH

1

1

S

+

2

2

BK

–

3

3

WH

TB6

TB6

nVent.com | 11

2.7 CONNECTIONS FOR REMOTE ANNUNCIATION — NGC-UIT2-EX

NGC-UIT2 Relay 1

To

n

NGC-UI

n

NGC-UIT2 Relay 2

n

Relay 1 on the NGC-UIT2-EX has been factory-configured and wired for “Any Alarms” unless
otherwise specified. It is powered by 12 Vdc and will energize a light on the front of the panel
if any alarm occurs. Relay 1 was also wired to a common alarm relay/terminal block for
remote annunciation of any alarms. Please see below the NGC-UIT2 Relay 1 in non-energized,
energized and in alarm condition.

Non-energized

alarm

light

Energized without an alarm conditionEnergized with an alarm conditio

To alarm

light

To alarm

light

NC

C

NO

NC

NO

NC

C

C

NO

Fig. 2.11 Relay 1 wiring

The NGC-UIT2 has two other Form C alarm relays (configurable through the NGC-UIT2 program)
for external alarms. Each relay can be connected to an annunciator light or distributed control
system. Each relay’s contacts have been wired from the NGC-UIT2 to a terminal block in the
panel.

Non-energized Energized without an alarm conditionEnergized with an alarm conditio

NC

C

NO

NC

NO

NC

C

C

NO

T2 Relay 3

Non-energized Energized without an alarm condition Energized with an alarm conditio

Fig. 2.12 Relays 2 and 3 wiring

IMPORTANT: An energized relay with no alarm condition will change state with loss of power
or an alarm condition.

12 | nVent.com

NC

NO

NC

C

C

NO

NC

C

NO

2.8 RS-232, RS-485, OR ETHERNET REMOTE PORT CONNECTIONS TO A HOST COMPUTER

NGC-UIT2-EX

The NGC-UIT2 can communicate with a distributed control system (DCS) or other host
computer through the NGC-UIT2 external communication ports. The NGC-UIT2 provides ports
for RS-232,

RS-485, and Ethernet communication. All of these communication ports provide data read
access. However, only one port can be assigned read/write access. This is done using

theNGC-UIT2.

2.8.1 RS-232 SERIAL CONNECTIONS

The RS-232 port can be used as a direct connection to a single PC located within 50 feet of the
panel. (Refer to Fig. 2.14 on page 16). For an RS-232 connection, a 5-foot long 9-pin female D
connector to 9-pin female D-connector null modem cable has been provided with the
NGC-UIT2. Using the supplied cable, plug one end into the RS-232 port on the NGC-UIT2 and
the other end into the 9-pin male connector on the user’s computer.

9-pin

female

RS-232

5-foot 9-pin female D connector
to 9-pin female D connector
null modem cable supplied with
NGC-UIT2-ORD

9-pin

female

PC Laptop

9-pin
male

Side view

Fig. 2.13 RS-232 connection

2.8.2 RS-485 SERIAL CONNECTIONS

Use the RS-485 port when multiple NGC-UIT2 units are to be connected to a host computer or
the connection is longer than 50 feet. An RS-485 to RS-232 or RS-485 to USB converter may be
required to make the connection to the user’s PC.

NGC-30 Panel

6

5

4

3

S

(+)

2

(–)

1

NGC-UIT2

RS-485

S

BK

WH

To NGC-30-CRM/-CRMS

Fig. 2.14 RS-485 connection

TB*

3

S

S

+ +

2

BK

BK

––

1

WH

WH

RS-485 Converter

* Reference panel drawing
for terminal block number

9-pin

female

PC

9-pin
male

nVent.com | 13

2.8.3 ETHERNET CONNECTIONS

e

The Ethernet port can be used to connect multiple NGC-UIT2 units to a host computer by
connecting to the user’s LAN system.

NGC-UIT2-EX

Fig. 2.15 Ethernet connection (NGC-UIT2-EX)

2.9 TESTING THE NGC-30 SYSTEM

Once the wiring to the panel has been finished, confirm that it was done properly by completing
the following steps:

1.  Turn the power on to all network devices (NGC-30-CRMs/-CRMSs and optional RMM2s &

2.  Once the NGC-UIT2 has booted up to the Main screen, Go to the Network | Device Screen

Bottom view

PLI modules) and the NGC-UIT2.

and press “Update Network.”

Ethernet

Ethernet cable

Network nod

Fig. 2.16 Network|Devices screen

3.  Confirm all modules have been scanned into the Network database.

4.  If a device or an RTD is installed but does not show up in the Network | Devices Screen,

For Devices:

For RTDs:

Turn the power on to all devices (NGC-30-CRMs/-CRMSs and optional RMM2s & PLI) and the

NGC-UIT2. Once the NGC-UIT2 has booted up to the Main screen, Go to the Network | Device

Screen and press “Update Network.” Confirm all NGC-30-CRM s/ -CRMSs, RTDs, and/or RMM2s
and PLI modules have been scanned into the Network database.

14 | nVent.com

turn the power off to the system and:

a.  Confirm the device has a unique address (refer to section 3.2 on page 24)
b.  Confirm the device is being powered
c.  Confirm the RS-485 connection is in place with the correct polarity (refer to section 2.6.5)

a.  Confirm the RTD connection is in place with the correct polarity
b.  Perform a resistance check of the RTD. The resistance should be in a range of 70–250

ohms

SECTION 3 – RAYCHEM NGC-30 COMPONENTS AND OPERATION

The RAYCHEM NGC-30 heat-trace system is comprised of a number of modular components,
allowing the ultimate in design flexibility. This section describes the NGC-30 control and
monitoring components (excluding the optional distribution section). Appendix B, C, and D
includes the specifications for these components.

3.1 USER INTERFACE TERMINAL (NGC-UIT2)

The NGC-UIT2 is a panel mounted color LCD display with touch-screen overlay. The NGC-UIT2
includes software that interfaces with the Card Rack Modules (NGC-30-CRM and NGC-30-CRMS)
and the Remote Monitoring Module for temperatures (RMM2), Remote Monitoring Module for
Digital Inputs (RMM-DI) and Power Line Carrier Interface (PLI) module.
The NGC-UIT2 is used as a control panel, setup device and user display.

3.1.1 MULTIPLE NGC-UIT2 MODELS

There are two versions of User Interface Terminals (UITs) available as specified in Table 2.1,
“NGC-30 User Interface Terminals (UIT2s),” on page 4. The term “NGC-UIT2” in this document
refers to any of the available NGC-UITs, regardless of which model is actually installed.

Fig. 3.1 Typical NGC-UIT2 model showing NGC-UIT2-ORD-R remote user interface terminal

The physical dimensions of each NGC-UIT2 model vary; the dimensions of the
NGC-UIT2-ORD-R shown in the figure are the largest of all NGC-UITs:

• Width: 15.21” (386 mm)

• Height: 13.21” (336 mm)

• Depth: 7.09” (180 mm)

NGC-UIT2 LCD Touch-Screen Display

The NGC-UIT2-EX and NGC-UIT2-ORD-R have a 7 inch wide x 5 ¼ inch high LCD
(17.5 cm X 13.3 cm) LCD color display. All NGC-UIT2 have touch-screen technology that
provides an user interface easy and efficient programming with no keyboards or cryptic labels.

nVent.com | 15

3.1.2 NGC-UIT2 LOCAL AND REMOTE NETWORK CONNECTIONS

Bottom view

NGC-UIT2-EX

The NGC-UIT2 communicates to both a local field network and optionally to a remote
monitoring and control network.

Local Field Network Connection

The local field network always uses an RS-485 serial connection running over shielded
twisted-pair cable. This network is used to connect the NGC-UIT2 to its control and monitoring
modules:

• RAYCHEM Mechanical Contactors Controller - NGC-30-CRM

• RAYCHEM Solid State Relay Controller - NGC-30-CRMS

• RAYCHEM Current Transformer Module Controller - NGC-30-CTM

• RAYCHEM Voltage Monitoring Module - NGC-30-CVM

• RAYCHEM Remote Monitoring Module for Temperature Measurement - RMM2

• RAYCHEM Remote Monitoring Module for Digital Inputs - RMM-DI

• RAYCHEM Power Line Carrier Interface Module - PLI
The local field network must follow configuration rules about topology and termination of

network end devices.

Remote Monitoring and Control Network Connection

The remote monitoring and control network communicates via a selectable network
connection port using either RS-485, RS-232, or 10/100Base-T Ethernet. This network is
used to connect to multiple NGC-UIT2 systems and communicate with a central PC running
RAYCHEM Supervisor software. The RAYCHEM Supervisor software provides centralized
status and alarm monitoring, data logging, and remote configuration control over all attached
NGC-UIT2 systems in the network. The remote monitoring and control network must also
follow configuration rules about topology and termination of the network end devices.

16 | nVent.com

CAN

(not used)

RS-485

(not used)

Reset

RS-485

Side view

(not used)

USBPower

Front view

Open Collector Outputs

RS-485 2

Debug Port (not used)

RS-485 1

Fig. 3.2 NGC-UIT2-EX touch-screen display, controls, and connections

USB device port

(not used)

Ethernet

Termination

RS-485-1

RS-232

Side view

Termination

RS-485-2

3.1.3 RS-485 CONFIGURATION SWITCHES

321

Reset

The configuration switches are found on the right side of the NGC-UIT2-ORD. Refer to table 3.1
for settings.

Table 3.1 NGC-UIT2-ORD Configuration Switch Functions

RS-485-1

Termination

RS-485-2

Termination

ON

Pull-up

Pull-down

Termination

Pull-down

Pull-up

Termination

(As-shipped default) RS-485
network “–” signal is forced
to a determinate state when
idle.

(As-shipped default)
RS-485 network “+” signal
is forced to a determinate
state when idle.

(As-shipped default) RS-485
network is terminated with
120-ohm resistor.

RS-485 network “–” signal
is not forced to a determinate
state when idle.

RS-485 network “+” signal
is not forced to a determinate
state when idle.

RS-485 network is not
terminated.

One and only one device (typically
this NGC-UIT2-ORD) on the RS-485
network should force the network “-“
signal to a determinate state.

One and only one device (typically
this NGC-UIT2-ORD) on the RS-485
network should force the network
“+“ signal to a determinate state.

Terminate the device (NGC-UIT2-ORD
or other) that is at each end of the
RS-485 network, for a total of two
terminated devices. No other devices
on the network should be terminated.

3.1.4 NGC-UIT2-EX RESET SWITCH

The reset switch is located on the side of the NGC-UIT2-EX panel. A pointed object is required
to press the restart switch and restart the UIT2 software.

Fig. 3.3 Reset switch

nVent.com | 17

3.2 CARD RACK MODULE (NGC-30-CRM/-CRMS) AND CURRENT TRANSFORMER MODULE (NGC-30-CTM)

12 Vdc Inputs (2x)

Address Switches

NGC-30-CRM/-CRMS

5

10

Each Card Rack Module (NGC-30-CRM and NGC-30-CRMS) and Current Transformer Module
(NGC-30-CTM) provide ground-fault and line current sensing, alarming, switching, and RTD
input for five Loops. The NGC-30-CRM is used with electromechanical relays. The NGC-30­CRMS is used with solid-state relays. The NGC-30-CRM/-CRMS may be connected to one
User Interface Terminal (NGC-UIT2).

Each NGC-30-CRM/-CRMS must have a unique communication address. The valid address
switch range for the NGC-UIT2 is 1–99. SW1 is the ones digit (0–9) and SW2 is the tens digit
(0–9). See Fig. 3.6.

IMPORTANT: RMM2s use ModBus addresses 32 through 47 and PLIs use Modbus addresses
1-99. When using RMM2s and PLI modules in an NGC-30 system, care must be taken to not
assign the same addresses to an RMM2, PLI module or an NGC-30-CRM/-CRMS board.

LSBMSB

8

Fig. 3.4 Communication address switch

IMPORTANT: When adding an NGC-30-CRM/-CRMS to the system, power must be cycled to
the board and a network update on the NGC-UIT2 must be performed.

3

SW1SW2

10

MSB LSB

TB 12

1

Alarm output

2

Relay outputs (5x)
LEDs (9x)

3

4

Fuse

TB 7 TB 6

TB 19

6 754321 8

6

End of Line (EOL) jumper

7

RS-485 Communications
Line & ground-fault sensor inputs (5x)

8

9

RTD Inputs

Fig. 3.5 NGC-30-CRM/-CRMS Board l Layout

9

TB 1 TB 2 TB 3 TB 4 TB 5

1 2 3

TB 13 TB 14 TB 15 TB 16 TB 17

18 | nVent.com

Each NGC-30-CRM/-CRMS has a cluster of nine LED lights to advise the status of the board.
Number 3 in Fig. 3.7 shows the location of the LED lights.

3.3 CARD RACK (NGC-30-CR)

Power

Relay 1

Relay 3

Tx

Alarm

Rx

Relay 2

Relay 4

Alarm Energized upon Alarm Red

PowerEnergizes upon power to unit Green

Relays 1, 2, 3, 4, 5Energizes upon relay closed Red

RX & TX Energizes upon received and

transmit of RS-485 data

Relay 5

Amber

LED functions

Table 3.2 LED Display

The Card Rack (NGC-30-CR) has the capability to house one to four Card Rack Modules (CRMs).

Fig. 3.6 NGC-30 card rack

3.4 VOLTAGE MONITORING MODULE (NGC-30-CVM) – OPTIONAL

The optional voltage sensor can monitor 80–290 Vac. This voltage sensor connects to one of
the five line current/ground-fault inputs of the NGC-30-CRM/-CRMS

(IMPORTANT: By using the optional voltage sensors, the NGC-30-CRM/-CRMS board looses

one circuit).

Fig. 3.7 NGC-30 voltage monitoring module

nVent.com | 19

3.5 REMOTE MONITORING MODULE (RMM2) – OPTIONAL

The RAYCHEM Remote Monitoring Module (RMM2) provides additional temperature
monitoring capabilities. Each RMM2 accepts up to eight RTDs that measure pipe, vessel,
or ambient temperatures. The RMM2 can be installed in the RAYCHEM NGC-30 enclosure or
can be located in the field to reduce RTD field wiring.The RAYCHEM NGC-30 system supports
260 temperature inputs via the CRM/CRMs boards. Sixteen (16) RMM2s can be connected
via a single, twisted pair RS-485 cable to provide up to 128 additional RTD inputs into the
RAYCHEM NGC-30 system.

Fig. 3.8 RMM2 module

Set the RS-485 address for the RMM2 using the rotary switch provided. Note the orientation of
the clear plastic cover, then remove the cover. Use a slotted screwdriver to rotate the selector
switches to the appropriate positions to select the RS-485 address. The single character visible
on the switch indicates the RS-485 address assigned.

0

0

6

Fig. 3.9 RMM2 rotary switch

Table 3.3 RMM2 Switch Settings

RMM2 Switch Settings

Switch Settings 0 1 2 3 4 5 6 7 8 9 A B C D E F

Device Address 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47

20 | nVent.com

3.6 POWER LINE CARRIER INTERFACE MODULE (PLI) – OPTIONAL

RAYCHEM PLI modules (Power Line Carrier Interface) together with RAYCHEM temperature
transmitters provide remote temperature-monitoring capability for heat-tracing control and
monitoring systems by communicating the temperature data to the control system over the
heat-tracing bus wires and the AC power line, eliminating the need for RTD wiring. Typical
savings on the installation costs of a heat-tracing system can be as much as 30% with PLI
technology, depending on the specifics of each application.

The PLI module typically resides in the NGC-30 panel and receives input from special
transmitters connected to the heat-tracing. The transmitters provide pipe temperatures from
RTDs and continuity confirmation; they are typically located at the front and/or end of the
heat-tracing circuit. The PLI special transmitters are: RAYCHEM SES (Smart End Seal),
RAYCHEM SPC (Smart Power Connection) and RAYCHEM 700-TT.

The NGC-30 system can accept up to 127 temperature inputs from SES/SPC transmitters or
255 temperature inputs from 700-TT transmitters, per PLI module. Up to four PLI modules can
be connected to one NGC-30 UIT2.

Fig. 3.10 PLI module

Set the RS-485 address for the PLI module using the rotary switches provided. Note the
orientation of the clear plastic cover, then remove the cover. Use a slotted screwdriver to rotate
the selector switches to the appropriate positions to select the RS-485 address. Each PLI
module must have a unique address, if two PLI modules, CRM or RMM are assigned the same
address, communication faults will result. The PLI module switch setting can be set from 1-99.

220

.

HN/H GABCN

Fig. 3.11 PLI module rotary switch

6

S2 S1

6

110

.

S

+

Norm

Mixed

S

0

0-9

S+

36

nVent.com | 21

3.7 THE REMOTE MONITORING MODULE FOR DIGITAL INPUTS (RMM-DI)

Provides the capability for the RAYCHEM NGC controller family to read the status of devices
remotely and can link them back to the electrical heat-tracing circuits.

The RMM-DI has in total 15 digital inputs. Multiple RMM-DI units can communicate with a
single User Interface providing centralized monitoring capabilities.

RS 485

DI-15

DI-14

DI-13

0

0

ADDR

H

L

230V:

IN

1.5 VA

~

L N L N

Out

DI Wiring: Output: min 12V @ 10mA

Fig. 3.12 RMM-DI 3D

Control and monitoring

A RAYCHEM NGC network controls up to 260 heat-tracing circuits per system based on
ambient or pipe temperatures. The RMM-DI module can be used to collect circuit breaker
status, contactor status or other digital information in the field. This information will be
communicated back to a central location via one communication cable, reducing installation
and wiring cost.

ADDR

115V:

DI -2 DI -3 DI -4 DI -5 DI -6 DI -7 DI -8 DI -9 DI -10 DI -11 DI -12

DI -1

L N L N

Out

DI Wiring: Output: min 12V @ 10mA

DI -1

230V:

IN

115V:

~

1.5 VA

DI -2 DI -3 DI -4 DI -5 DI -6 DI -7 DI -8 DI -9 DI -10 DI -11 DI -12

DI-13 DI-14 DI-15

ADDR

H

ADDR

L

Fig. 3.13 RMM-DI Front view

RS 485

22 | nVent.com

SECTION 4 – APPENDICES

APPENDIX A – REPLACEMENT COMPONENT ORDERING GUIDE

Replacement Components

Description Catalog Number Part Number

User Interface Terminal
Hazardous and non hazardous C1D2, Zn2

User Interface Terminal with TYPE 4 Enclosure
Nonhazardous (Unclassified) Locations; indoors or
outdoor, remote stand-alone mounting

NGC-30 Modules

Card Rack Module (for EMRs) NGC-30-CRM 10720-001

Card Rack Module (for SSRs) NGC-30-CRMS 10720-004

Current Transformer Module NGC-30-CTM 10720-002

Voltage Monitoring Module NGC-30-CVM 10720-005

NGC-30 Auxiliary

DB9F-DB9F Null Modem Cable 5 ft NGC-UIT2-RS232 20577020

Remote Monitoring Module RMM2 051778

Remote Monitoring Module with TYPE 4X Enclosure RMM2-4X 523420

Remote Monitoring Module for Zone 2 (ATEX) RMM2-EX-E 676040-000

Remote Monitoring Module for Digital Inputs RMM-DI 12444-016442

Remote Module for Control MONI-RMC-Base 309735-000

Power Line Carrier Interface: Smart End Seal Transmitter

120 V temperature/continuity transmitter SES-RTD-1 265212-000

208 – 277 V temperature/continuity transmitter SES-RTD-2 677596-000

120 V continuity transmitter SES-CONT-1 293536-000

208 – 277 V continuity transmitter SES-CONT-2 398720-000

120 V Smart End Seal replacement transmitter board SES-TT-1 815918-000

208 – 277 V Smart End Seal replacement
transmitter board

Smart End Seal Replacement RTD and stand assembly SES-RTD-Replace 693618-000

Power Line Carrier Interface: Auxiliary Equipment

Front End Filter – 480 V FEF-480 V 922847-000

Front End Filter – 600 V FEF-600 V P000000312

PLI Module PLI 488323-000

RTD lead wire, per 1000 ft reel MONI-RTD-WIRE 962661-000

RS-485 comm. wire, per 1000 ft reel MONI-RS485-WIRE 549097-000

NGC-UIT2-EX 10332-032

NGC-UIT2-ORD-R 10332-016

SES-TT-2 771274-000

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APPENDIX B – PANEL SPECIFICATIONS

Panel Specifications

Table B.1 Panel Specifications

General

Area of use

Nonhazardous Locations Hazardous Locations

ETL LISTED

CONFORMS TO

ANSI/UL STD. 508

UL STD. 508A

9700701 9700701

CERTIFIED TO

CAN/CSA C22.2 NO. 14

Approvals

Supply voltage 100 – 240 Vac, +5% / –10%, 50/60 Hz common supply for controller and heat-tracing

circuit Up to 600 Vac for heat-tracing circuit when controller is powered from a separate
circuit

Hazardous Locations

(EMR purged version)

ETL LISTED

CONFORMS TO

ANSI/UL STD. 508

UL STD. 508A

CERTIFIED TO

CAN/CSA C22.2 NO. 14

ETL LISTED
CONFORMS TO
NFPA STD 496

9700701

(SSR version)

ANSI/ISA STD 12.12.01

9700701

CSA STD C22.2 NO. 213

CSA STD C22.2 NO. 14

ETL LISTED

CONFORMS TO

UL STD 508A

CERTIFIED TO

Enclosure

Protection/materials TYPE 12 (indoors painted steel)

TYPE 4/3R (outdoors, painted steel)
TYPE 4X/3RX (outdoors, stainless steel)

Operating Temperature

NGC-UIT2-EX installed Without distribution: –40°F to 140°F (–40°C to 60°C)

Below –13°F (–25°C), space heater and thermostat must be used

With distribution: 14°F to 140°F (–10°C to 60°C)
Below 14°F (–10°C), space heater and thermostat must be used

Storage Temperature

NGC-UIT2-EX installed –40°F to 176°F (–40°C to 80°C)

Relative humidity 0% to 90%, noncondensing

Control

Heat-tracing circuits One NGC-UIT2 can configure and monitor up to 260 heat-tracing circuits

Relay types 3-pole, electromechanical (EMR versions)

1-, 2-, or 3-pole solid-state relays (SSR versions)

Voltage, maximum 240 Vac nominal, 50/60 Hz (standard), 600 Vac nominal (optional)

Current, maximum per circuit*
* Depending on panelboard amperage

rating, the maximum current may not be
used on all circuits.

Control algorithms EMR: On/Off, Ambient on/off, PASC (proportional ambient sensing control)

Control range –99°F to 900°F (–73°C to 482°C)

Dead band 1°F to 50°F (1°C to 50°C) (On/Off control only)

EMR: 30 A @ 104°F (40°C) or 60 A @ 104°F (40°C)
SSR: 30 A @ 104°F (40°C) or 60 A @ 104°F (40°C)

SSR: On/Off, Ambient on/off, PASC (proportional ambient sensing control),

 Proportional (includes soft start for all SSR control modes)

24 | nVent.com

Table B.1 Panel Specifications

Monitoring

Temperature
Low alarm range
High alarm range

Ground fault
Alarm range
Trip range

Current
Low alarm range
High alarm range

Voltage 100 – 277 Vac supply voltage to heat-tracing

–99°F to 900°F (–73°C to 482°C) or OFF
–99°F to 900°F (–73°C to 482°C) or OFF

10 mA to 200 mA
10 mA to 200 mA or OFF

0 A to 100 A (where 0 equals OFF)
0 A to 100 A (where 0 equals OFF)

(IMPORTANT: Requires the loss of one circuit)

Temperature Sensor Inputs

Monitoring RAYCHEM NGC-30 system can monitor up to 1040 (260 x 4) temperatures

Quantity per circuit Up to four temperature inputs can be assigned to one circuit

Temperature sources Hard-wired, optional RMM2 Module, optional PLI module

Temperature inputs per control point Standard:

One input standard per control point
Optional:
Up to three additional RTDs per control point connected via RMM2 and/or PLI Module

Temperature inputs per NGC-UIT2 Hard-wired:

Up to 260 hard-wired temperature inputs, one per circuit
RMM2 (optional):
Up to 128 RTD inputs via RMM2 Modules. Up to 8 RTDs per RMM2 Module and up to 16
RMM2 Modules per NGC-30 controller
PLI module (optional):
Up to 127 RTDs via SES Transmitter (per PLI Module)
Up to 127 RTDs via SPC Transmitter (per PLI Module)
Up to 255 RTDs via 700-TT Transmitter (per PLI Module)
Four PLI Modules per circuit, maximums 1040 RTDs

Types 100 W platinum RTD, 3-wire, a = 0.00385 ohms/ohm/°C

Can be extended with a 3-conductor shielded cable of 20 W maximum per conductor

(IMPORTANT: power wire and RTD wire should not be housed in the same conduit).

Alarm Outputs

Relay outputs 3 SPDT Form C. Rating: 3 A 100 – 277 Vac

Each relay may be assigned to alarm outputs

Programming and Setting

Method Via NGC-UIT2 (User Interface Terminal)

Units °F or °C

Digital display

 NGC-UIT2-EX 7 inch x 5 ¼ inch LCD color touch screen (17.5 cm X 13.3 cm)

Memory Nonvolatile, restored after power loss

Stored parameters (measured) Minimum and maximum temperatures, contactor cycle count, heater time in use

Alarm conditions Low/high temperature, low/high current, ground-fault alarm and trip, RTD failure,

communications failure, relay failure, relay count, total time heater energized, contactor
failure

nVent.com | 25

Table B.1 Panel Specifications

User Interface Terminals (UITs)

NGC-UIT2-EX Area Classification:

Usage:

NGC-UIT2-ORD-R Area Classification:

Usage:

Nonhazardous (Unclassified) or Hazardous Locations
TYPE 4 (indoors or outdoors)

Nonhazardous (Unclassified) Locations
The NGC-UIT2-ORD-R must be installed in a

nonhazardous, indoor or outdoor location.
The NGC-UIT2-ORD-R connects to RAYCHEM NGC-30

panels using RS-485 communications wiring.
TYPE 4 (indoors or outdoors)

Connection Terminals

Heating cable output Screw terminals, 20–6 AWG

(30 A versions), 14–2 AWG
(60 A versions)

Ground 14–4 AWG ground bar

RTD / alarm / communications 28–12 AWG spring clamp terminals

Distribution (for RAYCHEM NGC-30 EMR only)

Load power 120 / 208 / 240 / 277 / 347 / 480 /

600 Vac

Standard circuit breakers US (United States country code in ordering details):

Square D type QOB 120 / 208 / 240
Square D type NF 277 / 480
CA (Canada country code in ordering details):
Cutler Hammer (Canada) type BAB 120 / 208 / 240
Cutler Hammer (Canada) type GBH 277 / 480 / 347 / 600

Circuit breaker amperage rating 120 Vac

208, 240, 277, 347, 480, 600 Vac

120 Vac
208, 240, 277, 347, 480, 600 Vac

26 | nVent.com

APPENDIX C – NGC-30-CRM/-CRMS SPECIFICATIONS

Class I, Div. 2, Groups A,B,C,D

Class I, Zone 2, AEx nC IIC T5

Table C.1 NGC-30-CRM/-CRMS Specifications

General

Approvals/certifications

Supply voltage 12 Vdc ± 10%

Internal power consumption < 5 W per NGC-30-CRM/-CRMS

Operating temperature –40°F to 140°F (–40°C to 60°C)

Storage temperature –40°F to 167°F (–40°C to 75°C)

Environment PD2, CAT III

Max. altitude 2000 m

Humidity 0–90% noncondensing

Ex nC IIC T5

Electromagnetic Compatibility

Immunity Heavy industrial

Emission Residential, commercial, light industrial

Temperature Sensors

Type 100 W platinum RTD, 3 wire, a = 0.00385 ohms/ohm/°C

Can be extended with a 3-conductor shielded cable of 20 ohm maximum per conductor

Quantity Up to five wired directly to each NGC-30-CRM/-CRMS

Current Sensors

Mounting DIN Rail – 35 mm

Quantity per NGC-30-CTM Five for ground-current measurement. Five for line-current measurement

Line Current Sensors

Max. current 60 A

Accuracy ± 2% of reading

Ground-Fault Sensor

Range 10–200 mA

Accuracy ± 4% of range at 30 A line current

Voltage Sensor

Range 80–290 Vac 50/60 Hz

Accuracy ± 1% of span

Outputs

CRM output relays Form A 3-Amp @ 277 Vac max 50/60 Hz

CRMS SSR outputs 12 Vdc @ 30 mA max per output

Alarm relay Form C 3-Amp @ 277 Vac max 50/60 Hz

Communication to NGC-UIT2 or 200N

Type 2-wire RS-485

Cable One shielded twisted pair

Length 4000 ft. (1200 m) maximum*

 *IMPORTANT: May require an RS-485 repeater if communication length is greater

than 4000 ft.

Quality Up to 52* NGC-30-CRM/-CRMS may be connected to one NGC-UIT2

Up to 16 NGC-30-CRM/-CRMS may be connected to one 200N

Connection Terminals

Power supply/pilot relay/RTD/
comm port (RS485)

18–12 AWG (0.8 - 3.3 mm

2

)

nVent.com | 27

APPENDIX D – NGC-UIT2 SPECIFICATIONS

LR67275

Nonhazardous Locations

Nonhazardous Locations

Hazardous Locations

RU C-BE-MЮ62.B.02850

Ex nA IIC T5 Gc
Clas

–40°C

Table D.1 NGC-UIT2-EX Specifications

General

Approvals NGC-UIT2-EX

|| 3G

ITS15ATEX18221X

≤ Ta ≤ 60°C

IECEx ETL 15.0015X

2

RoHS

4000758

- 0.52 mm2)

s | Div.2 Groups A,B,C,D T5

Area of use Ordinary (nonhazardous) and Hazardous locations,

indoors or outdoors (IP65, Type 4X)

Supply voltage

9 – 30 Vdc, 15 W Max, AWG 18-22 (0.9 mm

Operating temperature –40°C to 60°C (–40°F to 140°F)

Minimum storage temperature –40°C to 80°C (–40°F to 176°F)

Dimensions 279 mm W X 229 mm H X 70 mm D (11 in. W X 9 in. H X 2.75 in. D)

Humidity Range 10 to 90% Non-Condensing

Approvals NGC-UIT2-ORD-R

2Ex nA IIC T5 Gc X

Area of use Nonhazardous, indoors or outdoors (IP65, TYPE4)

Supply voltage 9 – 30 Vdc, 3.6 – 1.2 A

Operating temperature –22°F to 140°F (–30°C to 60°C)

Minimum storage temperature –22°F to 176°F (–30°C to 80°C)

Dimensions 11" W X 9" H X 2.75" D (279 mm W X 229 mm H X 70 mm D)

Alarm Outputs

Transistor open collector outputs

Use to drive external relays Relays may be assigned for alarm outputs

Three open collector outputs, with a range of 5 – 30 Vdc with a max.
sink current of 500 mA

LCD Display

Display LCD is a 8.4 inch XGA, color TFT transflective device with integral LED backlight

Touch screen 5-wire resistive touch screen interface for user entry

Network Connection

Local/Remote Port RS-232/RS-485 ports may be used to communicate with host computers

(RAYCHEM Supervisor Software) or DCS

Local RS-232 A non-isolated, 9 pin D sub male

Remote RS-485 #2 2-wire isolated, 9 pin D sub male

Data rate Data Rate 9600 to 57600 baud

Maximum cable length For RS-485 not to exceed 4,000 ft (1,200 m). Cable to be shielded twisted pair.

Field Port RS-485, 2-wire isolated. Used to communicate with external devices, such as

NGC-30-CRM and RMM2. Maximum cable length not to exceed 4,000 ft (1,200 m).
Cable to be shielded twisted pair.

Field RS-485 #1 2-wire isolated, 9 pin D sub male

Data rate Data Rate To 9600 baud

LAN 10/100 Base-T Ethernet port with Link and Activity Status LEDs

USB Ports USB 2.0 Host port Type A receptacle (X2)

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APPENDIX E – DEVICE ADDRESS

Table E.1 Device Address

Device Device Type Switch Setting Device Address

NGC-30-CRM/-CRMS Relay Output/RTD 1–99 1–99

(If RMM2s are equipped or
will be added in the future,
skip addresses 32–47)

RMM2 RTD 0 32

RMM2 RTD 1 33

RMM2 RTD 2 34

RMM2 RTD 3 35

RMM2 RTD 4 36

RMM2 RTD 5 37

RMM2 RTD 6 38

RMM2 RTD 7 39

RMM2 RTD 8 40

RMM2 RTD 9 41

RMM2 RTD A 42

RMM2 RTD B 43

RMM2 RTD C 44

RMM2 RTD D 45

RMM2 RTD E 46

RMM2 RTD F 47

PLI module RTD 1-99 1-99

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APPENDIX F – RAYCHEM RMM-DI TECHNICAL SPECIFICATION

Table F.1 RAYCHEM RMM-DI technical specification

General

Area of use Hazardous area when mounted in Ex-d enclosure

RMM-DI panel mount, safe area

Approval

(Russia, Kazakhstan, Belarus)

   For other countries contact your local nVent representative.

Ambient operating temperature range –40°C to +60°C

Ambient storage temperature range –51°C to +60°C

Relative humidity Max. 95%, noncondensing

Supply voltage (Nominal) 115/230 Vac +10% -10%

50/60 Hz (jumper selectable)

Dimensions and mounting

Dimensions 125 mm x 75 mm x 60 mm, see drawing

Mounting DIN rail mountable

Digital input

Type 2 wire digital input

Supplied power Minimum power per DI connection supplied by RMM-DI module

12V 10mA (Sink/source)

Number of signals 15 Digital inputs

Communication to RAYCHEM NGC control system

Type RS-485

Protocol Modbus RTU

Cable type Shielded twisted pair

Length cable 1200 m max.

Address switch Selectable on RMM-DI, address range: 1-255

Connection terminals

Supply (in-out)

RS-485 connection

DI connections

2

4 terminals for cables 0.2 mm

to 4 mm

2 x 3 terminals for cables 0.2 mm

15 x 2 terminals for cables 0.2 mm

2

2

to 2.5 mm

2

to 2.5 mm

2

2

Electromagnetic compatibility

EN 60730-1: 2011

EN 61000-6-3:2007+A1:2011   EN 61000-3-2:2006 +A1:2009+A2:2009

EN 61000-3-3:2008

EN 61000-6-2:2005

Ordering details

Part Description RMM-DI

Product Number 1244-016442

EAN 5414506015560

30 | nVent.com

nVent.com | 31

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