Dräger REGARD Manuel utilisateur

8-INPUT 4-20 MODULE

8-CHANNEL DISPLAY CARD

(ATEX VERSION)

REGARD

GAS DETECTION SYSTEM

INSTRUCTIONS FOR USE

0 V

24V

0 V

24V

CH1

0 V

24V

CH2

0 V

24V

CH3

0 V

24V

CH4

0 V

24V

CH5

0 V

24V

CH6

0 V

24V

CH7

0 V

24V

CH8

0 V

8-CHANNEL DISPLAY

Power

Inhibit

SHIFT

h1 : 0

Fault

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)

Issue 2. October 2011

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)

Issue 2. October 2011

CONTENTS

FOR YOUR SAFETY 5

OPERATION 6

Intended use 6

Description 6

General 6

Power-on sequence 6

Command mode 7

Master card 7

Modbus gateway card 7

Electromagnetic compatibility (EMC) 7

Display card front panel controls and indicators 8

Display 8

LEDs 8

Push buttons 8

Input module terminals 9

Operational faults 10

Operational fault codes 10

INSTALLATION 12

Install input module 12

Connect RS-485 output to display card 12

Connect transmitters to input module 13

Connect DC supply to module 15

Install 8-channel display card 15

Optional connections 16

A1, A2, Fault alarm relays 16

Remote reset 16

CONFIGURATION 17

Command mode 17

Function of front panel controls in command mode 17

Accessing command mode 18

Entering a password 18

Changing a password 18

Save configuration settings 19

Locking card in command mode 19

Quit command mode 19

Table of commands 19

Basic configuration 21

Set number of heads connected to module 21

Set gas name 21

Set gas units 22

Set measurement range (FSD) 23

Set alarm trip levels 24

Set rising or falling alarms 24

Set alarm latch mode 25

Set zero 26

Set span 26

Advanced configuration 27

Set Regard channel numbers 27

Set Regard communications checksum 27

Set over-range latch 28

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)

Issue 2. October 2011

Set relay energise state 28

Set zero drift band 29

Set under-range fault level 29

Set over-range fault level 30

Set alarm hysteresis 30

Set user-definable text 31

Gas level display on / off 31

Set LEDs to display master alarms or per head alarms 32

Display head number or channel number 32

MAINTENANCE 33

Recommended maintenance intervals 33

Commands for system maintenance 33

Test LEDs and display 33

Test remote reset 33

Test alarm relays 34

Test communications with 8-input module 34

Disable alarm relays 34

TECHNICAL DATA 35

CE marking and ATEX marking 37

Special conditions for safe use 37

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)

Issue 2. October 2011

FOR YOUR SAFETY

Follow the instructions

Follow the instructions for installation, operation and maintenance.

Use in areas subject to explosion hazards

The 8-input 4-20 module and 8-channel display card are not designed for use in a

flammable atmosphere without suitable protection.

Liability for proper function or damage

Liability for proper function of this apparatus is irrevocably transferred to the owner or

operator to the extent that the apparatus has been commissioned, serviced or repaired

by personnel not employed or authorised by Draeger Service, or when this apparatus

was used in a manner not conforming to its intended use.

Draeger Limited can not be held responsible for any damage caused by non-compliance

with the above recommendations. The warranty and liability provisions of the terms and

conditions of sale and delivery of Draeger Limited are likewise not modified by

recommendations given above.

Maintenance

This apparatus must be inspected and serviced by experts at regular intervals and a

record maintained of such inspections and servicing. Repairs and general overhaul of this

apparatus should only be carried out by competent personnel.

We recommend that either a training course or service contract is obtained from

DraegerService and that all repairs are carried out by them.

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)

Issue 2. October 2011

OPERATION

Intended use

The REGARD 8-channel display card and 8-input 4-20 module provide:

•Measurement and display of gas level with gas measuring heads (transmitters) such

as Polytron 2. The equipment can be used with any 4-20mA transmitter.

•Activation of alarms when pre-set gas levels are exceeded.

The input module and display card are intended for permanent installation in a non-

hazardous environment, such as a control room or marshalling cabinet.

Description

GeneralThe 8-input 4-20 module takes signals from up to eight 2-wire or 3-wire 4-20mA

measuring heads (transmitters). The module provides terminals for field cables and DC

power to the transmitters. Signals from the eight inputs are multiplexed onto an RS-485

connection for transmission to the 8-channel display card. The display card displays the

gas level of each head and indicates alarm and fault conditions.

The display card has three alarm relays for

•A1 gas alarm

•A2 gas alarm

•Fault alarm

Each 8-input module requires an 8-channel display card. Only one module can be

connected to a display card.

The input module and display card can be located in separate enclosures or buildings.

The maximum distance of the RS-485 cable between the module and display card is

1km.

Power-on sequence

When power is applied to the display card, it is immediately inhibited and put into its

default state, all relays are de-energised. After about two seconds, when the

configuration settings have been read from the non-volatile memory, these settings are

applied. So if the A1 and A2 relays are set normally energised, they will change state.

The display card remains inhibited for a user definable period (default is the minimum of

30 seconds) allowing time for heads connected to the input module to settle. During this

period no data from the input module is processed by the display card. Once this power-

on inhibit period has elapsed data begins to be read from the module and the display

card enters its normal operating state.

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)

Issue 2. October 2011

Command mode

Introduction

All card settings, such as measurement range, zero, span, alarm levels, gas name and

alarm operation, are set using the commands available in command mode.

There are three levels of access in command mode, two of which require the entry of a

password:

•Read level, in which configuration settings can be read but not altered, and basic

testing done (no password needed);

•Maintenance level, which allows access to commands used during regular calibration

and maintenance (requires maintenance password);

•Configuration level, which allows access to all commands used to set up the card

(requires configuration password).

Refer to the Configuration section for a detailed description of Command mode and the

commands available.

Alarm inhibit

When a card is put into command mode gas alarms (A1 and A2) are inhibited: the relays

will remain in their current state and will not change state unless changed manually. Any

relay already in its alarm state when the card enters command mode will remain in that

state. The Inhibit LED lights and the Fault relay trips to indicate that alarms are inhibited.

You can manually change the state of the alarm relays while in command mode using

commands 14–4 (A1 relay), 14–5 (A2 relay) and 14–6 (Fault relay).

Locking cards in command mode

Cards exit command mode automatically if no buttons are pressed for 10 minutes. To

lock a card in command mode use command 60–0. Note that this command is not

available in read mode.

Master card

The Regard Master card provides common and/or voted alarm outputs and advanced

setup facilities. For more information refer to the Regard Master Card Operating Manual.

Modbus gateway card

The Regard Modbus gateway interface card provides a Modbus interface for Regard

systems. For more information refer to the Regard Modbus Gateway Card Operating

Manual.

Electromagnetic compatibility (EMC)

The Regard 8-input 4-20 module and display card have been tested for compliance with

the EMC Directive. Take the following steps to ensure compliance:

•Installation must follow the instructions given in this manual.

•Installation must also follow the Draeger document “Guidelines for the construction

and installation of Regard systems to comply with the EMC Directive” which is

available separately.

•Observe instructions to use screened cable, where given

Instructions or precautions that are essential for electromagnetic compatibility are

identified by “EMC!” in the margin.

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)

Issue 2. October 2011

Display card front panel controls and indicators

Display Display normally shows gas level of each head in sequence. When an alarm occurs,

display shows gas level of head(s) in alarm only.

Display Meaning

h1:0 Gas level for head 1 (gas level is 0)

h8:3 Gas level for head 8 (gas level is 3)

36:12 Alternative display of gas level, showing Regard channel

number instead of head number.

(E.g. gas level of channel 36 is 12.)

h1:FSD (‘FSD’ blinking) indicates that head 1 is over-range, i.e. the

gas level exceeds the current FSD setting. See also Set

over-range latch on page 28.

12:HCAL Indicates that the head on channel 12 is in calibration mode

FAULT.. Operational fault

LEDs

LED State Meaning

A3 No function

A2, A1, Fault Off

Flashing

No alarm

Alarm tripped, not acknowledged

Alarm tripped & acknowledged

Power On

Flashing DC power on

Operational fault

Inhibit

Blinking on (normally

off, on every 2.5 s)

Blinking off (normally

on, off every 2.5 s)

Relays inhibited

Relay(s) disabled

Relays inhibited + relays disabled

Push buttons

Function of front panel controls during normal operation:

Push button Function

Display gas name. E.g. h1:CO2

Display gas units. E.g. h2:PPM

SHIFT + Display A1 trip level.

Arrow after number indicates rising () or falling () alarm

E.g. h3:20

SHIFT + Display A2 trip level. E.g. h3:40

Display next head (channel).

Display previous head (channel).

+ Hold / release current channel.

(Press both push buttons at same time.)

RAcknowledge / reset alarm

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)

Issue 2. October 2011

Input module terminals

RS-485 OUTPUT

DC INPUT 1

DC INPUT 2

0 V

24V

0 V

24V

CH1

0 V

24V

CH2

0 V

24V

CH3

0 V

24V

CH4

0 V

24V

CH5

0 V

24V

CH6

0 V

24V

CH7

0 V

24V

CH8

0 V

4-20mA INPUT 2

4-20mA INPUT 1

4-20mA INPUT 3

4-20mA INPUT 4

4-20mA INPUT 5

4-20mA INPUT 6

4-20mA INPUT 8

4-20mA INPUT 7

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)

Issue 2. October 2011

Operational faults

An operational fault is a failure in operation of either the display card or input module.

Operational faults are either

•critical – card may stop working, or

•advisory – card will continue to work safely, but its functions may be limited

When an operational fault occurs:

•Power LED flashes once a second

•If fault is critical, fault relay alternately energises and de-energises at 1Hz

•Display shows fault code alternately with normal display

In the situation where multiple faults occur consecutively, the first fault to occur will be

displayed. When that is cleared subsequent faults may be displayed if they are

unaffected by the clearing of prior faults.

In the situation where multiple faults occur simultaneously, only one will be indicated on

the display. The fault states are monitored continuously in the following order:

C, CM, BR, B, B, B, B, BS, BR, RR, D, E, I, L and H.

Any of these may be overridden by the hardware exception faults M and We.

Press Rto clear the fault. If fault will not clear, or recurs, call DraegerService.

Operational fault codes

(See table on next page.)

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