GMA 41 / GMA 44控制器

GMA 41 / GMA 44控制器

l Easy mounting on DIN-rail

l State-of-the-art microprocessor technology

l Flexible, for all measuring tasks

l For 1 to 4 tran***itters

l Can also be configured at a later stage

Fixed systems gas warning for DIN-rail mounting：

The GMA 41, one channel gas warning system, and the 4-channel device GMA 44 together with the efficient and robust tran***itters of GfG offer safe and reliable gas warning systems.

Alarm thresholds：

Both systems h***e three alarm levels. Every alarm can be adjusted separately. False alarms are eliminated with the adjustable alarm delay. The threshold values can be freely adjusted within the detection range. They can also be adjusted at a later stage with the control keys to adapt to changing requirements. Every threshold value can be selected to be latching/non-latching and resettable/non-resettable.

Alarm relaying：

Every controller provides 4 voltage-free relays for the three alarms and the fault warning. The relays may be used to control external alarm devices like lamps or horns. They even can introduce specific counter measures to prevent or limit dangers from gases or vapours.

Additional Features：

The GMA 41 and GMA 44 store minimum and peak values and therefore after an alarm, the gas danger can exactly be determined. With the help of the key-operated switch, all connected GMA's can be switched to a collective alarm. The GMA (variant B) offers an integrated Bus-system. The Bus-system transfers alarms and malfuncti*** for a collective alarm and establishes the connection of the power supply for all GMA´s. Several GMA´s can simply be connected without any additional wiring required.

EC versi*** are integrated with a transformer for 230 V voltage supply. The GMA EC with high voltage can effectively operate all tran***itters with electrochemical sensors. The ECB version takes the multiple technology from the integrated transformer with the bus system to create

a dynamic sensor that still supplies a 230 V voltage.

GMA 41/44：

Gases

depending on tran***itter:

combustible/explosive, toxic gases

and vapors, oxygen

Detection range

depending on requirements:

% LEL, Vol %, ppm, mg/m3

Ambient temperature

-20 .. + 50ºC

(-4 to +122ºF)

Power supply

24 V DC, 230 V (GMA 41EC/44EC)

Power c***umption

Max. 4 W, normal 2 W

Input signal

0,2 .. 1 mA / 4 .. 20 mA

Output signal

Linear signal 4 .. 20mA (GMA 41)

Dimensi***

106 x 90 x 58 mm (WxHxD)

(4.24 x 3.6 x 2.32 inches)

Calibration

Automatic zeroing, calibration with data

logging

Alarms

3 Alarm thresholds, freely adjustable within

the detection range

Alarm functi***

Exceeding / falling short,

latching / non-latching,

resettable / non-resettable,

hysteresis adjustable,

delay-time 0 .. 2 minutes,

alarm thresholds completely adjustable,

alarm allocation by GMA 44

Relay outputs

4 voltage-free relays for alarm and fault,

normally closed contact (NC), normally

open contact (NO), change-over contacts.

Load: 1000 VA, 5 A

Display

3-digit LED display for linear measurement

values, Service

1 LED green - operational status

1 LED yellow - fault

3 LEDs red - alarm

display of maximum/minimum values

Function keys

4 different keys for all functi***, like alarm

thresholds, calibration, function test and

relay test

Function test

PFG No. 41300500

Models

GMA 41/GMA 44

Power supply 24 V

GMA 41 B/GMA 44 B

Bus system, power supply 24 V

GMA 41 EC/GMA 44 EC

Power supply 230 V, for operation of

electrochemical sensor with 0,2 .. 1 mA

signal output

GMA 41 ECB/GMA 44 ECB

Power supply 230 V, for operation of

electrochemical sensor with 0,2 .. 1 mA

signal output, bus system

Key-operated switch

GMA 41/GMA 44 SW (24 V)

GMA 41/GMA 44 SW (230 V)

Power Supply Module

PS 12 (12 W)

PS 30 (30 W)

PS 50 (50 W