Rockwell Automation 1797-RPFM User Manual

Installation Instructions

ControlNet Ex Modular Repeater Adapter &
Fiber Repeater Module

Catalog Numbers 1797-RPA and 1797-RPFM

Contents

For Information About See Page

Important User Information 2
About the ControlNet Ex Fiber Repeater Hub 4
DIN-Rail Mount the 1797-RPA and -RPFM 5
Installation in Zone 1 for CENELEC 8
Installation in Division 1/Zone 1 for UL, C-UL and FM 8
Electrostatic Charge 9
European Community (EC) Directive Compliance 9
Inputs/Outputs 11
Wire the Modules 12
Describing the ControlNet Ex System Diagram 14
Certification Specific ControlNet Ex System Diagrams 17
CENELEC Installation Label 18
CENELEC ControlNet Ex System Diagram 19
UL, C-UL ControlNet Ex System Diagram 20
FM ControlNet Ex System Diagram 22
Module Indicators 24
About the Mounting Kit 26
Repair 26
Specifications - 1797-RPA 27
Specifications - 1797-RPFM 29
Mounting Dimensions 31

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2 ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module

WARNING

IMPORTANT

ATTENTION

SHOCK HAZARD

BURN HAZARD

Important User Information

Solid state equipment has operational characteristics differing from those of electromechanical
equipment. Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls
(Publication SGI-1.1 available from your local Rockwell Automation sales office or online at

http://www.literature.rockwellautomation.com) describes some important differences between solid

state equipment and hard-wired electromechanical devices . Because of this dif fe ren ce , and als o becaus e
of the wide variety of uses for solid state equipment, all persons responsible for applying this equipment
must satisfy themselves that each intended application of this equipment is acceptable.

In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages
resulting from the use or application of this equipment.

The examples and diagrams in this manual are included solely for illustrative purposes. Because of the
many variables and requirements associated with any particular installation, Rockwell Automation, Inc.
cannot assume responsibility or liability for actual use based on the examples and diagrams.

No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits,
equipment, or software described in this manual.

Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell
Automation, Inc. is prohibited.

Throughout this manual we use notes to make you aware of safety considerations.

Identifies information about practices or circumstances that can cause an explosion in a
hazardous environment, which may lead to pers onal injury or death, property damage, or
economic loss.

Identifies information that is critical for successful application and understanding of the
product.

Identifies information about practices or ci rcumstances that can lead to pe rsonal injury or
death, property damage, or economic loss. Attentions help you identify a hazard, avoid a
hazard, and recognize the consequence.

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Labels may be located on or inside t he equipment to alert people that danger ous v olt age
may be present.

Labels may be located on or inside the equipment to alert people that surfaces may be
dangerous temperatures.

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ATTENTION

41163

Repeater
Backplane
Connector

Module Locking Tab

Power and 
Common Connections

Indicators

Backplane Connector Cover

1797-RPA

Label Here

Do not remove
unless connecting to
1797-RPFM.

ControlNet Ex 
Tap Drop BNC 
Connector With
Insulator Boot

ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module 3

Environment and Enclosure

This equipment is considered Group 1, Class A industrial
equipment according to IEC/CISPR Publicatio n 11. Without
appropriate precautions, there may be potential diffic ulties
ensuring electromagnetic compatibility in other environm ents
due to conducted as well as radiated disturbance.

This equipment is supplied as open-type equipment. It must be
mounted within an enclosure that is suit ab ly designed for those
specific environmental conditions that will be present and
appropriately designed to prevent personal injury resulting from
accessibility to live parts. The interior of the enc losure must be
accessible only by the use of a tool. Subsequent sections of this
publication may contain additional information regarding
specific enclosure type ratings that are required to comply with
certain product safety certifications .

1797-RPA

COMM

MODULE

STATUS

STATUS

REPEATER

ADAPTER

PWR

1

2

3

4

+V

-V
+V

-V

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4 ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module

41267

Repeater
Backplane
Connector

Module Locking Tab

Backplane Connector Cover

1797-RPFM

Label Here

Do not remove
unless connecting to
1797-RPFM.

1797-RPFM

Chan 1

Recv

Chan 2

Xmit

Recv

Xmit

About the ControlNet Ex Fiber Repeater Hub

Use the repeater adapter (1797-RPA ) and the fiber module (1797-RPFM)
together to form a repeater hub within the hazardous area to extend the
length of the ControlNet Ex segments to interlink systems all operating
within the area.

The 1797-RPA repeater adapter, configured with at least one repeater adapter,
functions as the intelligent starter block for a multiport repeater. The
1797-RPFM is a nonintelligent fiber-to-backplane conversion device,
converting glass-fiber infra red LED media signals to ba ckplane signals for use
by the 1797-RP A.

A maximum of two 1797-RPFM modules may be used with one 1797-RPA
adapter.

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ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module 5

ATTENTION

ATTENTION

41167

41166

DIN-Rail Mount the 1797-RPA and -RPFM

Refer to Mounting Dimensions on page 31. For panel mounting information,
see publication 1794-5.13.

This product is grounded through the DIN rail to the dedicated
intrinsic safety ground. Use zinc-plated yellow-chromate steel
DIN rail to assure proper grounding. The use of other DIN rail
materials (such as aluminum or plastic) that can corrode, oxidize ,
or are poor conductors, can result in improper or intermittent
grounding.

1. Position the module on a 35 x 7.5 mm DIN rail (A-B part number

199-DR1) at approximately a 30o angle.

The DIN rail or mounting bracket must be appropriately
connected to the dedicated intrinsic safety gr ound.

2. Hook the lip on the rear of the adapter onto the top of the DIN rail,

and rotate the module onto the rail.

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6 ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module

ATTENTION

41168

3. Press the adapter down onto the DIN rail until flush.

The locking tab should snap into position and lock the module to the
DIN rail.

Make certain that the adapter and fiber modules are secured
together with DIN rail anchors. Failure to do so may result in
the loss of communications, cause damage to the modules, or
both.

4. If the adapter does not snap into position, use a screwdriv er or similar

device to move the locking t ab down while pressing the module flush
onto the DIN rail.

Release the locking tab to lock the module in place. If necessary, push
up on the locking tab to lock.

5. Remove the adapter backplane connector cover.

6. Follow steps 1 to 4 to attach fiber modules to the DIN rail.

7. Once attached to the DIN rail, slide fiber modules to the left to mate

with the adapter.

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ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module 7

IMPORTANT

IMPORTANT

41169

A DIN-rail end anchor (A-B part number 1492-EA35) must
be used on the left side of the adapter and on the right side of
the fiber module to keep the units from moving.

8. Make sure the last fiber module has its backplane conne ctor cover in

place.

9. Connect the adapter wiring as shown below in the Wi rin g sec ti on .

You can only attach two me di a modules to the repeater
adapter. If you exceed the module limit , you may cause
damage to the adapter or fiber modules and void the IS
certification.

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8 ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module

WARNING

WARNING

0102

ControlNet Ex System

Allen-Bradley

Attention!
Avoid electrostatic charging!

-200C <= Ambient Temperature <= +700C

1 Allen-Bradley Dr.
Mayfield Hts., OH USA

DMT 99 ATEX E 065 X
II (1)2G Ex ia ib IIC

41307

Installation in Zone 1 for CENELEC

Modules must not be exposed to the environ me nt . Provide a suitable metal
enclosure. A label with this system marking must be attached near the main
components of the system. If the system is installed in a cabinet, this label
must be fixed inside the cabinet.

Modules cannot be used in an intrinsically safe environment
after they have been exposed to nonintrinsically safe signals.

Installation in Division 1/Zone 1 for UL, C-UL and FM

This adapter must not be exposed to the environment. Provide a suitable
metal enclosure. This adapter has a protection factor of IP20.

Make certain that you only connect ControlNet Ex adapters to other
intrinsically safe system modules to maintain the integrity of the
intrinsically-safe backplane.

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This adapter cannot be used in an intrinsically safe environment
after it has been exposed to nonintrinsically safe signals.

1797-5.15 - June 2010

ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module 9

Electrostatic Charge

Protect the system against electrostatic charge. Post a sign near this module:

WARNING Avoid electrostatic charging.
ADVERTÊNCIA! PREVENIR CONTRA O ACÚMULO DE CARGA

ELETROSTÁTICA.

For your convenience, a sign that can be cut out is included in this installation
instruction.

European Community (EC) Directive Compliance

If this product has the CE mark it is approved for installation within the
European Community or EEA regions. It has been designed and tested to
meet the following directives.

EMC Directive

If this product has the CE mark it is approved for installation within the
European Community or EEA regions. It has been designed and tested to
meet the following directives.

These products are tested to meet the Council Directive 2004/108/EC by
applying the following standards:

 EN 61000-6-4:2007, Electromagnetic Compatibility (EMC) - Part 6-4:

Generic Standard for Industrial Environments (Class A)

 EN 61000-6-2:2005, Electromagnetic Compatibility (EMC) - Part 6-2:

Generic Standards - Immunity for Industrial Environments

 EN61326-1:2006 (Industrial), Electrical Equipment For

Measurement, Control, and Laboratory Use - Industrial EMC
Requirements

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10 ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module

ATEX Directive

These products are tested in conjunction with associated I/O modules to
meet the Council Directive 94/9/EC (ATEX) Equipment and Protective
Systems Intended for Use in Potentially Explosive Atmospheres by applying
the following standards.

 EN60079-11:2007, Explosive atmospheres - Part 11 : equipment

protection by intrinsic safety "i"

 EN60079-0:2006, Electrical apparatus for explosive gas atmospheres -

Part 0 : general requirements

 EN 60079-26 : 2004, Electrical apparatus for explosive gas

atmospheres - Part 26 : construction, test and marking of Group II
Category 1 G electrical apparatus

 EN61241-0 : 2006, Electrical apparatus for use in the presence of

combustible dust - P art 0: General requirements

 EN61241-11:2006, Electrical apparatus for use in the presence of

combustible dust – P a rt 11: Prot ection by intrinsic safety 'iD'

UL, C-UL Compliance

If this product has the UL/C-UL mark, it has been designed, evaluated,
tested, and certified to meet the following standards:

 UL 913, 1988, Intrinsically Safe Apparatus and Associated Apparatus

for Use in Class I, II, and III Division 1, Hazardous (Classified)
Locations

 UL 1203, Explosion-Proof and Dust-Ignition-Proof Electrical

Equipment for Use in Hazardous (Classified) Locations

 UL 2279, Electrical Equipment for Use in Class I, Zone 0, 1, and 2

Hazardous (Classified) Locations

 UL 61010, UL Standard for Safety Electrical Equipment For

Measurement, Control, and Laboratory Use; Part 1: General
Requirements

 CSA C22.2 No. 157-92, Intrinsically Safe and Non-Incendive

Equipment for Use in Hazardous Locations

 CSA C22.2 No. 30-M1986, Explosion-Proof Enclosures for Use in

Class I Hazardous Locations

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ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module 11

41309

1797-RPA

Power
Supply

+V

-V

Channel

Network Bus

uCuC

Fiber Hub Bus

 CSA-E79-0-95, Electrical Apparatus for Explosive Gas Atmospheres,

Part 0: General Requirements

 CSA-E79-11-95, Electrical Apparatus for Explosive Gas

Atmospheres, Part 11: Intrinsic Safety “i”

 CSA C22.2 No. 14-95, Industrial Control Equipment

FM Compliance

If this product has the FM mark, it has been designed, e valuated, tested, and
certified to meet the following standards:

 FM C1. No.3600:1998, Electrical Equipment for Use in Hazardous

(Classified) Locations General Requirements

 FM C1. No.3610:1999, Intrinsically Safe Apparatus and Associated

Apparatus for Use in Class I, II, III Division 1 Hazardous (Classified)
Locations

 FM C1. No.3615:1989, Explosionproof Electrical Equipment General

Requirements

 FM C1. No.3810:1989, 1995, Electrical and Electronic Test,

Measuring and Process Control Equipment

 ANSI/NEMA 250, 1991, Enclosures for Electrical Equipment

Inputs/Outputs

Do not apply any nonintrinsically safe signals to the adapter or fiber modules.
When using as an intrinsically safe electrical apparatus according to EN

60079-11, the European directives and regulations must be followed
.

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12 ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module

IMPORTANT

IMPORTANT

41310

1797-RPFM

Channel 1

Channel 2

Receiver

Receiver

Transmitter

Transmitter

Bus

Proc

Fiber Hub Bus

41170

ControlNet Ex
Coax Tap

Insulator Ring
Installed

Wire the Modules

1. Connect the ControlNet Ex tap drop cable to the connector after

removing the insulator boot.

The tap drop BNC must have its insulator ring in position
when inserted in the adapter BNC connector.

2. Connect the fiber media to the fiber module by selecting either the left

or right set of receive and transmit ports and attaching the receive and
transmit fibers, as appropriate.

Publication

Make note of which fiber is receive and which is transmit as
they must be interchanged at the opposite end.

1797-5.15 - June 2010

ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module 13

Receive

Transmit

Transmit

Receive

41311

41297

Control

REPEATER ADAPTER

12

+V -V +V -V

1797 - RPA

Net Ex

PWR

43

B-A

Allen-Bradley

QUALITY

.

.

1

Recv Xmit Recv Xmit

B-A

Allen-Bradley

1797 - RPFM

Net Ex

Control

FIBER MODULE
MEDIUM RANGE

Chan 1

.

Chan 2

QUALITY

Comm

Module

Status

Status

.

B-A

Allen-Bradley

QUALITY

Comm

Module

Status

Status

.

Control

REPEATER ADAPTER

12

+V -V +V -V

1797 - RPA

Net Ex

PWR

43

B-A

Allen-Bradley

QUALITY

.

.

1

Recv Xmit Recv Xmit

Chan 1

Chan 2

3. Apply +V and -V power to the adapter through a removable terminal

block from the Ex power supply.

+V -V +V -V

+V -V +V -V

Screw terminals and spring terminals are provided.

4. Strip the +V and -V wires to a length so no bare conductor shows

after inserting the wires into position.

1797 - RPFM

Net Ex

Control

FIBER MODULE
MEDIUM RANGE

.

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14 ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module

WARNING

IMPORTANT

5. If you are using the spring terminals of the plug, insert a screwdriver
into the slot and carefully pry until the spring clamp opens to accept
the wire.

Do not use any unused terminals on this adapter. Using these
terminals as supporting terminals can result in damage to the
module and unintended operation of your system.

Make certain that you power this adapter with an intrinsically
safe power supply. Do not exceed the va lues listed in the
specifications for this adapter.

Do not remove or replace a module when power is applied.
Interruption of the bus can result in unintended operation or
machine motion.

If you connect or disconnect wiring while the field-side power is
on, an electrical arc can occur. This could cause an explosion in
hazardous location installations. Be sure that power is removed
or the area is nonhazardous before proceeding.

Make sure all fiber modules are attached and secured prior to
applying intrinsically safe power to the adapter. Failure to do
so may cause damage to the adapter and modules.

Describing the ControlNet Ex System Diagram

A maximum of 48 ControlNet Ex nodes may be connected together by 250 m
(820 ft) of coax cable and 48 taps. The distance to increases to 1000 m (3280
ft) when you use only 2 taps. See the table below for more information.

The fiber media of the 1797-RPFM can be installed in a hazardous location
(Zone 0, 1 or 2; Class I, Zones 0, 1, and 2; Class I, Division 1 and 2; Class II,
Division 1 and 2; Class III, Division 1 and 2) to connect two 1797-RPFM
modules or they can be installed through different locations into the
nonhazardous location to connect the 1797-RPFM with any approved
associated apparatus.

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ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module 15

All cables and fiber media that are not light blue must be marked as IS using
the 1797-EXMK marking kit or other locally approved IS identification or
segregation method.

During the installation of the ControlNet Ex system, all metallic parts must be
isolated to prevent an earth connection (hi gh voltage withstandi ng of isolating
material must be > 500V ac).

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16 ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module

System
Diagram Name

Catalog
Number

Catalog Name Description

1797-RPA 1797-RPA ControlNet Ex

Modular Repeater
Adapter

1797-RPFM 1797-RPFM ControlNet Ex Fiber

Repeater Module,
Medium Distance

1797-ACNR15/B 1797-ACNR15/B Redundant Media

CNet Ex Tap Trm 1797-TCAP ControlNet Ex Tap

ControlNet Ex
Tap

1797-TPx ControlNet Ex Coax

CNet Ex Trk Trm 1797-XT ControlNet Ex Trunk

ControlNet Ex
Adapter

(Dummy) Terminator

Tap

Terminator

Coax Trunk Cable 1786-RG6 Quad-Shield, RG-6

75

 Coax Trunk

Cable

None None Standard Coax Trunk

Cable BNC Couplers

Represents one ControlNet Ex
node and must be connected
to a coax trunk cable by
1797-TPx



Allows connection of a
maximum of two devices per
1797-RPA and is powered
directly by 1797-RPA

Represents one ControlNet Ex
node and must be connected
to a coax trunk cable by 
1797-TPx -each one with two
redundant output channels
that are connected to different
ControlNet Ex networks (coax
cables and 1797-TPx)

Represents one ControlNet Ex
node and is a simple capacitor
(56 pF) with a coax connector

Four types of connections
available: S (straight t-tap), R
(right angle t-tap), YS (straight
y-tap), and YR (right angle
y-tap) - a maximum of 48 taps
can be connected together by
coax trunk cable

Simple resistor (75 ) with
coax connector that must be
on each end of the ControlNet
Ex coax trunk for termination

Maximum (functional) length
between 2 1797-TPx is 1000 m
(3280 ft) - each 1797-TPx
reduces the (functional) coax
cable length by 16.3 m (53.4 ft)

Different standard cable
couplers, such as 90

o

, 180o.

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ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module 17

Certified Equivalent ControlNet Ex System Diagram Items

You may use these items as equivalents for the ite ms shown on the system
diagram.

System Diagram Name Catalog Number Source

1797-RPA 1797-RPA Allen-Bradley
1797-RPFM 1797-RPFM Allen-Bradley
1797-ACNR15 1797-ACNR15 Allen-Bradley

Coax Trunk Cable

(1)

ControlNet Ex Tap 1797-TPx Allen-Bradley
CNet Ex Trk Trm 1797-XT Allen-Bradley
CNet Ex Tap Trm 1797-TCAP Allen-Bradley

1 In addition to these cable types, the following specification can be followed to allow additional

types:



Cable Impedance = 75  + 3 
Cable Capacitance = <5.94 nF per 100 m
Cable Resistance = >9.08  per 100 m
Cable Attenuation 0.2 MHz > 0.93 dB/100 m 5 MHz > 1.39 dB/100 m
(-20…70 °C) 0.5 MHz > 0.95 dB/100 m 10 MHz > 1.86 dB/100 m

2 Belden Wire & Cable 1189A may be used, but with functional loss of communication distance,

nodes, or both.

1786-RG6 Allen-Bradley
3092A

(2)

Belden Wire & Cable Co.

3092A with blue jacket Belden Wire & Cable Co.

1 MHz > 1.07 dB/100 m 20 MHz > 2.73 dB/100 m
2 MHz > 1.16 dB/100 m 50 MHz > 4.33 dB/100 m

Certification Specific ControlNet Ex System Diagrams

The following pages include certification specific ControlNet Ex system
diagrams and notes pertaining to these diagrams. Select either CENELEC,
UL, C-UL, or FM and follow the requirements of that diagram as you
configure and install your system.

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18 ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module

CENELEC Installation Label

A label with this system marking must be attached near the main components
of the system. If the system is installed in a cabinet, this label must be fixed
inside the cabinet.

Allen-Bradley
1 Allen-Bradley Dr.
Mayfield Hts., OH USA

ControlNet Ex System

DMT 99 ATEX E 065 X
II (1)2G Ex ia ib IIC

-200C <= Ambient Temperature <= +700C

Attention!
Avoid electrostatic charging!

CENELEC 1797-RPA, -RPFM I/O Entity Parameters

Terminals Uo (V) Io (mA) Groups Co (F) Lo (H)

0102

Male Bus
Connector

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5.4 400 IIB/IIC 65 10

1797-5.15 - June 2010

ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module 19

1

.

.

.

.

.

CNet Ex

trk trm

30670CE

ControlNet Ex

tap

Safe Area

Hazardous Area

Zone 0

Node 1

ControlNet Ex

tap

ControlNet Ex

tap

ControlNet Ex tap

CNet Ex

tap trm

Ci<

68 pF

Li negl.

ChB

Uo=5.4V,

Io=160 mA,

F

-3

>500 kHz

Flexbus

Uo=5.4V,

Io=400 mA,

Po=2.16 W,

Co=65 F,

Lo=10 H

Ch0

fiber

The Coax Trunk Cable is permitted to have a minimum length of 1,000m with only 2 connected ControlNet Ex

Taps dropping to only 250m with the maximum allowed connected ControlNet Ex Taps of 48.

Node 4 ... 48

Node 3

The ControlNet Ex System is an intrinsically safe system according to EN 50039. When installing the system, the

certificate of conformity and the national installation regulations must be heeded. The components of the

ControlNet Ex system and the interconnections are shown on the installation drawing (A-B Pub. 1797-6.5.6).

For the transmittal between the safe area and the hazardous area only optical glass-fibers are permit t ed. The

diameter of a single glass-fiber must be >6um. The power density of the transmitter diode must be <5mW/mm

2

.

Protect the system against electrostatic charge. Post a sign near the main components of the system: Attention!

Avoid electrostatic charge.

1797-ACNR15/* or

RSD-GW-Ex2.CN

1797-ACNR15/* or

RSD-GW-Ex2.CN

Flexbus

Uo=5.4V,

Io=400 mA,

Po=2.16 W,

Co=65 F,

Lo=10 H

Power Supply

Ui=9.5V,

Ii=1 A,

Ci=<

120 nF,

Li=negligible

ChA

Uo=5.4V,

Io=160 mA,

F

-3

>500 kHz

Power Supply

Ui=9.5V,

Ii=1 A,

Ci=<120 nF,

Li=negligible

ChB

Uo=5.4V,

Io=160 mA,

F

-3

>500kHz

ChA

Uo=5.4V,

Io=160 mA,

F

-3

>500 kHz

75 Ohm

1W

Ci negl.

Li negl.

The ambient temperature range of the ControlNet Ex system is -20 to +70

o

C.

Near the main components of the system a plate with the system marking must be attached. If

the system is installed in a cabinet the plate must be fixed on the inside of the cabinet door.

*RG6-CNet is defined as: Cable Impedance=75 Ohm + or -3 Ohm

Cable Capacitance<

6nF per 100 m

Cable Resistance>9.08 Ohm per 100 m

Cable Attenuation (-20to+70

o

C) 0.2 MHz > 0.93 dB/100 m 5 MHz > 1.39 dB/100 m

0.5 MHz >

0.95 dB/100 m 10 MHz >1.86 dB/100 m

1 MHz >

1.07 dB/100 m 20 MHz > 2.73 dB/1 00 m

coax trunk cable

coax trunk cable

Cable type 1189A,

3092A, or 3092A Blue

from manufacturer

Belden Wire or type

RG6-CNet*

CNet Ex

trk trm

75 Ohm

1W

Ci negl.

Li negl.

Ci < 60 pF

Li < 560 nH

Li < 1100 uH Li < 1100 uH

Node 2

1797-RPA/* orRSD-CFA-Ex.CN

1797-RPFM/* or



RSD-FC-Ex2.CN 3km

1797-RPFM/* or



RSD-FC-Ex2.CN 3 km

Ch0

fiber

Ch1

fiber

Ch1

fiber

Power Supply

Ui=9.5V,

Ii=1 A,

Ci=<

120 nF,

Li=negligible

Uo=5.4V,

Io=201 mA,

F

-3

>500 kHz

Hazardous Area Zone 0

CENELEC ControlNet Ex System Diagram

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20 ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module

1

.

.

1

Hazardous (Classified) Location

Class I, Zones 1 and 2, Groups IIC, IIB, IIA

Class I Division 1 and 2, Groups A, B, C, D

Class II, Division 1 and 2, Groups E, F, G

Class III, Division 1 and 2

CNet Ex

trk trm

30670

ControlNet Ex

tap

CNet Ex

trk trm

Non-Hazardous

Location

1786-RPFM

or

any associated

apparatus where the light

emitting diode output

is <5mW/mm

2

Hazardous (Classified)

Location

Zone 0, 1 or 2, IIC

Class I, Zones 0, 1 and 2,

Groups IIC, IIB, IIA

Class I Division 1 and 2,

Groups A, B, C, D

Class II, Division 1 and 2,

Groups E, F, G

Class III, Division 1 and 2

Hazardous (Classified) Location

Zone 1 or 2, IIC

Class I, Zones 1 and 2, Groups IIC, IIB, IIA

Class I Division 1 and 2, Groups A, B, C, D

fiber optic cable

any IS device with

entity concept

parameters V

max

, I

max

C

i

, L

i

) appropriate for

connection to

associated apparatus

with entity concept

parameters listed in

Table 1.

Maximum devices=8.

Node 1

ControlNet Ex

tap

ControlNet Ex

tap

ControlNet Ex

tap

CNet Ex

tap trm

coax trunk cable

ChBChA

1

ChA

ChB

any IS device with entity

concept parameters V

max

,

I

max

C

i

, L

i

) appropriate for

connection to associated

apparatus with entity

concept parameters

listed in Table 1.

Maximum devices=8.

To any approved device or

associated apparatus with

Entity Concept 

parameters of V

oc

=9.5V

and I

sc

=1 A

Power Supply 

Vmax=9.5V, 

Imax=1 A, 

Ci<

120 nF, 

Li=0

coax trunk cable

Ch1

Ch1

The ambient temperature range of the ControlNet Ex

system is -20 to +70

o

C.

3

Node 4 ... 48

1797-ACNR15

Node 3

1797-ACNR15

Node 2

1797-RPA

1797-RPFM 1797-RPFM

1

2

2

1

54

2

2

To any approved device or

associated apparatus with

Entity Concept 

parameters of V

oc

=9.5V

and I

sc

=1A

1

Power Supply 

Vmax=9.5V, 

Imax=1 A, 

Ci<

120 nF, 

Li=0

Ch0

Ch0

Power Supply 

Vmax=9.5V, Imax=1 A,

Ci<

120 nF, Li=0

To any approved device

or associated

apparatus with Entity

Concept 

parameters of V

oc

<9.5V

and I

sc

<1 A

1

2

UL, C-UL ControlNet Ex System Diagram

Publication

1797-5.15 - June 2010

ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module 21

UL, C-UL ControlNet Ex System Requirements

The entity concept allows interconnection of intrinsically safe apparatus

with associated apparatus not specifically examined in combination as a
system when the approv ed values of V
apparatus are less than or equal to V
apparatus and the approved values of C
are greater than C

+ C

i

and Li + L

cable

and Isc or Vt and It of the associated

oc

max

and I

cable

of the intrinsically safe

max

and La of the associated apparatus

a

respectively for the intrinsically safe

apparatus.

Wiring methods must be in accordance with the National Electric Code,

ANSI/NFPA 70, Article 504 and 505 or the Canadian Electric Code CSA
C22.1, Part 1, Appendix F. For additional information refer to ANSI/IS A
RP12.6.

WARNING: Substitution of components may impair intrinsic safety.

AVERTISSEMENT: La substitution de composant peut comp romettre la
securite intrinseque.

If fiber optic cable is provided with a metal shield, it must be connected

to a dedicated intrinsic safety ground in the nonhazardous location and tied
back in the hazardous location or be co nnected to a ground in the hazardous
location and tied back in the nonhazardous location.

The glass fiber must have a minimum diameter of 6 m.

UL, C-UL, FM 1797-RPA, -RPFM I/O Entity Parameters

Terminals Vt (V) It (mA) Groups Ca (F) La (H)

Male Bus
Connector

5.8 400 A to G 3.0 3.0

Publication

1797-5.15 - June 2010

22 ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module

1

.

.

1

Hazardous (Classified) Location

Class I, Zones 1, Groups IIC

Class I Division 1, Groups A, B, C, D

Class II, Division 1, Groups E, F, G

Class III, Division 1

Non-Hazardous Location

CNet Ex

trk trm

30670

ControlNet Ex

tap

Location

Class I, Zone 0

Group IIC

Class I Division 1,

Groups A, B, C, D

Class II, Division 1,

Groups E, F, G

Class III, Division 1

Hazardous (Classified) Location

Class I, Zone 1, Group IIC

Class I Division 1, Groups A, B, C, D

fiber optic cable

Node 1

ControlNet Ex

tap

coax trunk cable

ChBChA

ChA

ChB

Vmax=9.5V, 

Imax=1 A, 

Ci<=120 nF, 

Li=0

coax trunk cable

Ch1

Ch1

The ambient temperature range of the ControlNet Ex system is -20 to +70

o

C.

3

Node 4 ... 48

1797-ACNR15

Node 3

1797-ACNR15

Node 2

1797-RPA

1797-RPFM 1797-RPFM

1

2

2

54

2

2

Ch0

Ch0

2





For connection to other I/O

modules, refer to General FM

Certification Information in

Publication 1797-6.5.6.

For connection to other I/O

modules, refer to General

FM Certification Information

in Publication 1797-6.5.6.

From FM approved

1797-PS2N



From FM approved

1797-PS2N

Vmax=9.5V, 

Imax=1 A, 

Ci<=120 nF, 

Li=0









Any associated apparatus

where the light emitting diode

output is <5mW/mm

2

or total

<1mW.

Vmax=9.5V, 

Imax=1 A, 

Ci<=120 nF, 

Li=0



From FM approved

1797-PS2N

ControlNet Ex

tap



ControlNet Ex

tap



CNet Ex

tap trm



CNet Ex

trk trm



Any associated apparatus

where the light emitting diode

output is <5 mW/mm

2

or total

<1 mW.

1786-RPFM

or

Any associated apparatus

where the light emitting diode

output is <5 mW/mm

2

or total

<1 mW.







11







FM ControlNet Ex System Diagram

Publication

1797-5.15 - June 2010

ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module 23

FM ControlNet Ex Requirements

The entity concept allows interconnection of intrinsically safe apparatus

with associated apparatus not specifically examined in combination as a
system when the approv ed values of V
apparatus are less than or equal to V
apparatus and the approved values of C
are greater than C

+ C

i

and Li + L

cable

apparatus.

Wiring methods must be in accordance with the National Electric Code,

ANSI/NFPA 70, Article 504 and 505. For additional information refer to
ANSI/ISA RP12.6.

WARNING: Substitution of components may impair intrinsic safety.
If fiber optic cable is provided with a metal shield, it must be connected

to a dedicated intrinsic safety ground in the nonhazardous location and tied
back in the hazardous location or be co nnected to a ground in the hazardous
location and tied back in the nonhazardous location.

The glass fiber must have a minimum diameter of 6 m.
The ControlNet Ex tap must be connected directly to the module (no

additional cable may be co nnected).

Must be FM approved.
Total coax trunk cable length is limited to 1000 m (3280 ft) with up to 2

ControlNet Ex taps connected and to 250 m (820 ft) with the maximum
allowed ControlNet Ex taps of 48 . For ControlNet Ex taps between 2 and 48
use: 1000 m (3280 ft) - 16.3 m (53.4 ft) x (number of taps - 2) to find the
maximum allowed cable length.

and Isc or Vt and It of the associated

oc

max

and I

cable

of the intrinsically safe

max

and La of the associated apparatus

a

respectively for the intrinsically safe

Publication

1797-5.15 - June 2010

24 ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module

41174

Module Power Status

Comm Status

Module Status

1797-RPA

Module Indicators

The following explains the indications seen on the 1797-RPA and
1797-RPFM modules.

1797-RPA Indicators

The figure below identifies indicators on the repeater adapter.

1797-RPA

COMM

MODULE

STATUS

STATUS

Power Indicator

If This Indicates

Steady Green Power is applied.
Off No power is applied.

Comm and Module Status Indicators for the 1797-RPA Module

REPEATER
ADAPTER

PWR

1

2

3

4

+V

-V
+V

-V

If Both Are This Indicates

Alternately 
Red/Green

The adapter is being powered-up or reset. The LEDs alternately
flash red and green for about 5 s.

Steady Green Normal operation.
Off The unit is not powered. Check the module power status.
Red There is an adapter fault.

If the fault indication is caused by a jabber condition, the fault
indication will automatically be cleared when the jabber condition
is removed from the coax or fiber port.

If a jabber condition is not causing the fault, replace the repeater
adapter.

Publication

1797-5.15 - June 2010

ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module 25

41312

Channel 2 Status

1797-RPFM

Channel 1 Status

If Either Is The Respective Segment (1 or 2) is

Flashing Green/Off Experiencing temporary network errors.

The situation will normally correct itself. If the situation persists,
troubleshoot your nodes and cable system. When troubleshooting
your cable system, make sure:

 all BNC connector pins are properly sealed.
 all taps are A-B taps.
 all terminators are 75  and are installed at both ends

of all segments.

Flashing Red/Off Experiencing a high level of network errors.

This may indicate a broken cable, broken tap, or missing segment
terminator.

Important: The indicators will flash red/off when a system has no
network activity. This would be normal for a system that has no
ControlNet nodes installed or enabled.

1797-RPFM Indicators

The figure below identifies indicators on the fiber module.

1797-RPFM

Chan 1

Recv

Chan 2

Xmit

Recv

Xmit

1797-RPFM Comm and Status Indicators

If Both Are This Indicates

Off There is no power or the module is faulted.
Green The channel is operational.
Flashing Green/Off There is no data activity on the associated channel.

Publication

1797-5.15 - June 2010

26 ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module

IMPORTANT

1794-NM1
Mounting Kit with
18 screws (2 screws for the
adapter and 2 screws for
each module).

30238

About the Mounting Kit

Use the optional 1794-NM1 mounting kit to mount your system on a panel or
wall without a DIN rail.

Repair

The adapter and fiber module are not field-repairable. Any attempt to open
this adapter or fiber module will void the warranty and the IS certification. If

repair is necessary, return the modules to the man u facturer.

For detailed certification information, refer to the FLEX Ex
System Certification Reference Manual, publication
1797-6.5.6.

Publication

1797-5.15 - June 2010

ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module 27

Specifications - 1797-RPA

I/O Capacity 2 fiber modules
IS Media Type Ex ib IIB/IIC T4,

IS Module Type Ex ib IIB/IIC T4,

Communication Rate 5 Mbps
ControlNet Ex BNC Oscillation powered by:

Indicators Comm - green/red

Output (Intrinsically Safe)

(30 Pin Male TTL Bus
Connector)

Isolation Path

Bus to Power Supply
Adapter to Adapter
ControlNet Ex Node to Other

Nodes

ControlNet to Power Supply

Power Supply

(-V, +V Intrinsically Safe)

Power Consumption 8.5 W
Power Dissipation 8.5 W
Thermal Dissipation 29 BTU/hr
Conductors Wire Size

Dimensions Metric

Imperial

AEx ib IIC T4,
Class I, Division 1 Groups A to G T4

AEx ib IIC T4,
Class I Division 1 Groups A to D T4

Uo< 5.4V dc
Io< 201 mA
ac coupled with high-pass filter f > 500 kHz

Module - green/red
Power - green

Manufacturer specific bus
Uo < 5.4V

Io < 201 mA
Po < 1.09 W
Lo < 0.45 mH
Co < 71 F



Galvanic to DIN EN 60079-11
Galvanic functional
Galvanic functional



Galvanic to DIN EN 60079-11
Ui < 9.5V dc

Ii < 1 A
Pi < 9.5 W
Li = negligible
Ci < 120 nF

4 mm2 (12 gauge) stranded max

1.2 mm (3/64 in.) insulation max
94 mm x 94 mm x 91 mm 

(3.7 in. x 3.7 in. x 3.58 in.)

Publication

1797-5.15 - June 2010

28 ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module

Class I Division 1 Hazardous

FM

Weight Approximately 200 g
Environmental Conditions

Operational Temperature
Storage Temperature
Relative Humidity 5…95% noncondensing

Shock Operating Tested 15 g peak acceleration, 11 (±1) ms pulse width

Nonoperating Tested 15 g peak acceleration, 11 (±1) ms pulse width

Vibration Tested 2 g @ 10…500 Hz per IEC 68-2-6

Agency Certification

CENELEC II (1) 2G ib[ia] IIC T4

UL, C-UL Class I Division 1 Groups A to D T4

INMETRO BR-Ex ia/ib IIB/IIC T4

Certificates

CENELEC DMT 99 ATEX E011 X

UL, C-UL UL File Number E197983

-20…70 oC (-4…158 oF)

-40…85 oC (-40…185 oF)

Class I Zone 1 AEx ib IIC T4

FM Cla ss I Division 1 Groups A to D T4

Class I Zone 1 AEx ib IIC T4

IECEx Ex ib IIC T4 and Ex ib[ia] IIC T4

FM FM Certificate Number 3009806

Publication

INMETRO 05/UL-BRAE-0011X

IECEx IECEx BVS 09.0021X

1797-5.15 - June 2010

ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module 29

Specifications - 1797-RPFM

IS Media Type Ex ia IIB/IIC T4,

IS Module Type Ex ib IIB/IIC T4,

Communication Rate 5 Mbit/s
Approximate Fiber Media Length 3 km
Fiber Type 62.5…125 mm
Fiber Termination Type ST (plastic or ceramic)
Fiber Operating Wavelength 1300 nm
Optical Power Budget 13.3 dB
Fiber Optic Transmitter 

Ch1 and Ch2

Indicators Channel 1 status - green

Input (Intrinsically Safe)

(30 Pin Female TTL Bus
Connector)

Output (Intrinsically Safe)

(30 Pin Male TTL Bus
Connector)

Isolation Path

Bus to ControlNet
Power Consumption Included in 1797-RPA
Power Dissipation Included in 1797-RPA
Thermal Dissipation Included in 1797-RPA
Weight Approximately 100 g
Dimensions Metric

Imperial

AEx ia IIC T4,
Class I, Division 1 Groups A to G T4

AEx ib IIC T4,
Class I Division 1 Groups A to D T4

Optical peak output power
P

< 1 mW

optical

Channel 2 status - green



Ui < 5.4V
Ii < 201 mA
Pi < 1.1 W
Li < 15 H
Ci < 41 F



Uo < 5.4V
Io < 201 mA
Po < 1.1 W
Lo < 0.45 mH
Co < 71 F



Galvanic to DIN EN 60079-11

94 mm x 94 mm x 91 mm 
(3.7 in. x 3.7 in. x 3.58 in.)

Publication

1797-5.15 - June 2010

30 ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module

Class I Division 1 Hazardous

FM

Environmental Conditions

Operational Temperature
Storage Temperature
Relative Humidity 5…95% noncondensing

Shock Operating Tested 15 g peak acceleration, 11 (±1) ms pulse width

Nonoperating Tested 15 g peak acceleration, 11 (±1) ms pulse width

Vibration Tested 2 g @ 10…500Hz per IEC 68-2-6

Agency Certification

CENELEC II (1) 2G ib[ia] IIC T4

UL, C-UL Class I Division 1 Groups A-D T4

INMETRO BR-Ex ia/ib IIB/IIC T4

Certificates

CENELEC DMT 99 ATEX E011 X

UL, C-UL UL File Number E197983

-20…70 oC (-4…158 oF)

-40…85 oC (-40…185 oF)

Class I Zone 1 AEx ib [ia] IIC T4

FM Class I Division 1 Groups A-D T4

Class I Zone 1 AEx ib IIC T4

IECEx Ex ib IIC T4 and Ex ib[ia] IIC T4

FM FM Certificate Number 3009806

Publication

INMETRO 05/UL-BRAE-0011X

IECEx IECEx BVS 09.0021X

1797-5.15 - June 2010

ControlNet Ex Modular Repeater Adapter & Fiber Repeater Module 31

.

.

12

43

+V -V +V -V

QUALITY

B

­A

Allen-Bradley

1797 - RPA

Control

Net Ex

REPEATER ADAPTER

Comm

Status

Module

Status

PWR

.

.

Recv Xmit Recv Xmit

Chan 2

Chan 1

1797 - RPFM

QUALITY

B

­A

Allen-Bradley

Control

Net Ex

FIBER MODULE

MEDIUM RANGE

Recv Xmit Recv Xmit

Chan 2

Chan 1

1797 - RPFM

QUALITY

B

­A

Allen-Bradley

Control

Net Ex

FIBER MODULE

MEDIUM RANGE

mm (in.)

41426

80

(3.2)

94

(3.7)

94

(3.7)

94

(3.7)

50

(2.0)

87

(3.4)

Mounting Dimensions

Publication

1797-5.15 - June 2010

Rockwell Automation Support

Rockwell Automation provides technical information on the Web to assist you in using
its products. At http://support.rockwellautomation.com
manuals, a knowledge base of FAQs, technical and application notes, sample code and
links to software service packs, and a MySupport feature that you can customize to
make the best use of these tools.

For an additional level of technical phone support for installation, configuration, and
troubleshooting, we offer T echConnect Support programs. For more information,
contact your local distributor or Rockwell Automation representative, or visit

http://support.rockwellautomation.com

.

Installation Assistance

If you experience a problem with a hardware module within the first 24 hours of
installation, please review the information that's contained in this manual. You can also
contact a special Customer Support number for initial help in getting your module up
and running.

United States 1.440.646.3434 Monday – Friday, 8am – 5pm EST
Outside United States Please contact your local Rockwell Automation representative for

any technical support issues.

New Product Satisfaction Return

Rockwell tests all of its products to ensure that they are fully operational when shipped
from the manufacturing facility. However, if your product is not functioning, it may
need to be returned.

United States Contact your distributor. You must provide a Customer Support case

number (see phone number above to obtain one) to your distributor
in order to complete the return process.

Outside United States Please contact your local Rockwell Automation representative for

return procedure.

Allen-Bradley, Rockwell Automation, ControlLogix, RSLinx, TechConnect, and FLEX I/O are trademarks of
Rockwell Automation, Inc.

Trademarks not belonging to Rockwell Automation are property of their respective companies.

, you can find technical

Publication 1797-5.15 - June 2010 PN-79499

Supersedes Publication 1797-5.15 - February 2006 Copyright © 2010 Rockwell Automation, Inc. All rights reserved. Printed in the U.S.A.