ENMET LC1, LC2, LC4 Operation And Maintenance Manual

ENMET

680 Fairfield Court

LC-Series Controller

Ann Arbor, MI 48108

734.761.1270 Fax [phone]

www.enmet.com

1-4 Channel

Operation and Maintenance Manual

LC-Series Controller: 1-4 Channel

ENMET

Manual Revi s i on Date – June 13, 2017

Page | 1

Manual Part No. – 80003-050

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Table of Contents

1.0 INTRODUCTION .................................................................................................................................................................... 2

1.1 Unpack ............................................................................................................................................................................................. 2

1.2 Check Order ..................................................................................................................................................................................... 2

1.3 Serial Numbers................................................................................................................................................................................. 2

2.0 FEATURES ........................................................................................................................................................................... 3

2.1 Front panel features .......................................................................................................................................................................... 3

3.0 INSTALLATION ..................................................................................................................................................................... 4

4.0 WIRING THE LC SERIES ....................................................................................................................................................... 6

4.1 System Wiring ................................................................................................................................................................................. 6

4.1.1 Power Supply Module ..................................................................................................................................................................................... 7

4.1.3 Connections L C1............................................................................................................................................................................................. 8

4.1.4 Connections L C2............................................................................................................................................................................................. 9

4.1.5 Connections L C4........................................................................................................................................................................................... 10

4.2 Sensor Transmitter Installation ...................................................................................................................................................... 11

4.2.1 Example 2 Wire Sensor Transmitter ............................................................................................................................................................. 11

4.2.2 Example 3 Wire Sensor Transmitter ............................................................................................................................................................. 11

5.0 OPERATION ....................................................................................................................................................................... 12

5.1 LC-Series Microcontroller Module ................................................................................................................................................ 12

5.2 Analogue Output Configuration ..................................................................................................................................................... 14

5.2.1 4-20mA Current Source ................................................................................................................................................................................ 14

5.2.2 4-20mA Current Sink .................................................................................................................................................................................... 15

5.2.3 1-5V Voltage Output ..................................................................................................................................................................................... 16

6.0 MAINTENANCE .................................................................................................................................................................. 17

7.0 TECHNICAL DATA AND SPECIFICATIONS ............................................................................................................................. 18

8.0 TERMS AND CONDITIONS ................................................................................................................................................... 21

8.1 Ordering Information ..................................................................................................................................................................... 21

8.2 Delivery ......................................................................................................................................................................................... 21

8.3 Payment Terms .............................................................................................................................................................................. 21

8.4 Warranty Information and Guidelines ........................................................................................................................................... 21

8.5 Return Policy ................................................................................................................................................................................. 21

9.0 INSTRUCTIONS FOR RETURNING AN INSTRUM ENT FOR SERVICE ........................................................................................... 22

List of Figures

Figure 1: LC Series Front Panel Features .................................................................................................................................................. 3

Figure 2: Mounting LC Series ................................................................................................................................................................... 5

Reference Information:

NOTE: [important information about use of instrument]

AUTION: [affects equipment – if not followed may cause damage to instrument, sensor etc.…]

C

ARNING: [affects personnel sa fe ty – if not followed may cause bodily injury or death.]

W

Attention / Warning

Earth Ground

LC-Series Controller: 1-4 Channel

ENMET

Manual Revi s i on Date – June 13, 2017

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Manual Part No. – 80003-050

1.0 Introduction

The LC Series Cont rol Units that provide facilities to monitor a wide variety of industry standard environme ntal a nd other sensors.

 The LC1 provides 1 monitoring channel.
 The LC2 provides up to 2 monitoring channels.
 The LC4 provides up to 4 monitoring channels.

The LC-Series Controller has been designed to allow the use of any ENMET sensor transmitter and has been preprogrammed to
match the sensor transmitters supplie d at time of delivery. The LC-Series can also be used with any manufactures sensor transmitter
that can produce a voltage or current output within a specified range; however, it is advisable that you contact ENMET for proper
setup and programming instructions. Care has been taken with the design of the MCU housings and internal chassis to facilitate ease
of connection and wire termination. All on-site wiring to the system is via screw terminal connectors. The terminal cover has an
internal label giving details of the external connections.

OTE: All specifications stated in this manual may change without notice.

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1.1 Unpack

Unpack the LC-Series Controller and exa mine it for shipping da mage. If such damage is observed, notify both ENMET
customer service personnel and the commercial carrier involved immediately.

Regarding Damaged Shipments

OTE: It is your responsibility to follow these instructions. If they are not followed, the carrier will not honor any claims for

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damage.

 This shipment was carefully inspected, verified and properly packaged at ENMET and delivered to the carrier in good

condition.

 When it was picked up by the carrier at ENMET, it legally became your company’s property.
 If your shipment arrives damaged :

 Keep the items, packing material, and carton “As Is.” Within 5 days of receipt, notify the carrier’s local office and

request immediate inspection of t he carton and the contents.

 After the inspection and after you have received written acknowledgment of the damage from the carrier, contact

ENMET Customer Service for return authorization and further instructions. P le a se have your Purchase Order and Sales
Order numbers available.

 ENMET either repairs or replaces damaged equipment and invoices the carrier to the extent of the liability coverage, usually

$100.00. Repair or replacement charges above that value are your company’s responsibility.

 The shipping company may offer optional insurance coverage. ENMET only ins ures shipments with t he shipping company

when asked to do so in writing by our customer. If you need your shipments insured, please forward a written request to
ENMET Custo me r Service.

Regarding Shortages

If there are any shortages or questions regarding this shipment, please notify ENMET Customer Service within 5 days of receipt at
the following address:

ENMET

680 Fairfield Court

Ann Arbor, MI 48108

734-761-1270 Fax [phone]

Toll Free: 800-521-2978

1.2 Check Order

Check, the contents of the shipme nt against t he purchase order. Verify that the LC-Series Controller is received as ordered. If
there are accessories on the order, ascertain that they are present. Check the contents of calibration kits. Notify ENMET customer
service personnel of any discrepancy immediately.

1.3 Serial Numbers

Each LC-Series Controller is serialized. These numbers are on tags on the equipment and are on record in an ENMET database.

LC-Series Controller: 1-4 Channel

ENMET

Manual Revi s i on Date – June 13, 2017

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Manual Part No. – 80003-050

LED

Description

Power

Green LED for Power

AL3

Red LED indication of Alarm Level 3

AL2

Red LED indication of Alarm Level 2

AL1

Red LED indication of Alarm Level 1

Fault

Yellow LED, Lower most, indication of Fault Condition

Keypad Buttons, 4

programming

Menu – Main Select Switch

Display

Graphic display simultaneously showing reading for each channel and sensor type

C1 60 %

CO2

Display

Power LED

Fault LED

Alarm 1, 2 & 3 LED

Alarm Acknowledgment Switch

Menu Switch

Increase & Decrease Switches

2.0 Features

The LC-Series Controller houses all of the components required to implement a sophisticated and reliable monitor ing system (alarm
relays etc.). See Figure 1 for location of features:

2.1 Front panel features

See Figure 1 for location of features.

2 as indicated in figure 1 that ar e
used during normal operation and 2
that are used during setup and

Increase – Menu Option, used in setup & progr amming
Decrease – Change Swit ch, used i n s etup & pro gramming
Alarm Ac k nowled g me n t – Ho rn Defect Switch

An Audible signal is also provided by a sounder mounted within Microcontroller module. This provides a local audible tone during
alarm or conditions.

LEL

CH4

C2 0.0 %v/v

Figure 1: LC Series Front Panel Features

LC-Series Controller: 1-4 Channel

ENMET

Manual Revi s i on Date – June 13, 2017

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Manual Part No. – 80003-050

LC-2 Control Unit

4.585

[116.4]

2.968
[75.4]

5.937

[150.8]

.38

[9.6]

7.39

[188]

5.26

[134]

6.30

[160.0]

LC-1 CONTROL UNIT

7.656

[194.4]

4.764

[121.0]

9.528

[242.0]

11.02
[280]

6.14
[156]

8.58

[218.0]

.39

[10.0]

3.0 Installation

The LC-Series Controller is fully tested pr ior to delivery. However, it is recommended that the LC-Series Controller system be
checked after installation is co mple te .

CAUTION: The MCU Control Units and associated modules contain no user serviceable parts. Refer all servicing to qualified
service personnel

The LC series control units must be mounted in a non-hazardous location where there is no risk of the presence of potentially
explosive gas

Either a 100-240VAC 50/60 Hz supply or a 24V DC supply can be used to power the control unit
The location of installation should be chosen with regard to the followin g:

 This equipment should not be located near to known sources of heat.
 Operating personnel should be within convenient reach of the equipment and within audible distance of alarms
 Maximum loop lengths of cable run and cable inductance to resistance ratios must not exceed limits shown in the relevant

loop diagrams

 Avoid mounting this equipment near potential sources of elec tr ic a l inter fer ence e.g. motors, switch gear, radio transmitters etc.

Mounting details for the LC Controller enclosures are located below:

LC-Series Controller: 1-4 Channel

ENMET

Manual Revi s i on Date – June 13, 2017

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Manual Part No. – 80003-050

LC-4 Control Unit

Figure 2: Mounting LC Series

LC-Series Controller: 1-4 Channel

ENMET

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Manual Part No. – 80003-050

4.0 Wiring the LC Series

The electrical installation should conform to appropriate electrical codes, such as the National Electrical Code in the United States.

ARNING: The compliance o f the installation to appropriate codes is not ENMET’s responsibility.

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4.1 System Wiring

All connections should be made according to the appropriate sensor or loop diagram for the configuration required. It is advised
that ‘Bootlace Ferrules’ or ‘flat blade crimps’ be used for tidy and reliable connections of wires into the Control Unit and Detector
Head connectors

Power Supply Input

An isolating switch should be provided between the power source and the MCU control units to allow the supply to be easily
disconnected. This should incorporate over current protection or a circuit breaker. Alternatively, a fused supply would suffice

AC Mains Connection

The power supply board has three screw terminals connector assigned for the connection of an AC supply.
Pin 1 = Ear th
Pin 2 = Live i nput
Pin 3 = Neutral input
Recommendation for mains input cable. 3-Core – 16 AWG Conductors having cross sectional area of 0.75mm

DC Voltage Connection

The power supply board has two screw terminals assigned for the connection of a DC supply
Pin 4 = +24V DC input
Pin 5 = 0V D C input

Cable Routing

Due to the low signal levels generated by gas detectors it is recommended that all wiring to the sensors by segregated away from
AC mains or other high voltage/power lines to avoid interference.
Cable Screening

The use of a screened cable is recommended for the installation of all detector heads. The screening is used to minimize the effects
of electrical interference generated by external equipment e.g. motors, switchgear etc. The correct strategy for connecting the
screens depends upon the area in which the detector head is to be used (i.e. hazardous/ non-hazardous). In all cases the screen
should not be connected at the detector head

2

minimum (24/0.2)

LC-Series Controller: 1-4 Channel

ENMET

Manual Revi s i on Date – June 13, 2017

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Manual Part No. – 80003-050

TRACO

®

POWER

FG

AC(N)

AC(L)

Input: 100 – 240 VAC

47-63 Hz

0.375 A max

Output: 24VDC / 625 mA

TML 15124

Fault relay

Fuse 1

Fuse 2

1 2 3 4 5 6 7 8 9 10 11 12

Common L3 Alarm

Relay

Power Switch

4.1.1 Power Supply Module

The Power Supply is sit uated on the LHS of the main PCB within the encl osure and provide s the power for the whole system.
The power supply is a standard item and does not require any modifications regardless of the type and quantity of detector
heads being used.

There are two power source options available to the system
100-240V AC Mains Supply, connectors 1, 2 and 3
18 to 28V DC Supply, connectors 4 and 5
There are two fuses situated on the main PCB. These are:
FS1 (T1.0A) AC s upply Fuse
FS2 (T500mA) DC Supply F us e