GasSens
Gas Detection System
Section 2 - A14 Receiver Module
O & M Manual
A14-RK, 8/06
2 - 1
RECEIVER MODULE
Introduction
Series A14 Receivers provide the user interface to the gas detection system. Each receiver is
connected to a series A11 sensor/transmitter with a 2 conductor cable, and displays information
on the gas concentration in the sensor area. Receivers are powered by a separate 12 VDC power
supply (part no. 00-0055) supplied as part of the system, or by a power supply furnished by the
user (12 VDC only).
PUSHBUTTON FOR ALARM
ACKNOWLEDGMENT AND RESET
4 DIGIT LED DISPLAY - INDICATES GAS
CONCENTRATION
AMBER & RED LEDS - “WARNING”
AND “ALARM” BAR INDICATORS
RED LED - “TROUBLE” BAR INDICATOR,
INDICATES LOSS OF TRANSMITTER INPUT
AND CERTAIN OTHER SYSTEM PROBLEMS
GREEN LED - “POWER ON” BAR INDICATOR
WITH GAS SYMBOL DESIGNATION,
ENGINEERING UNITS (PPM, PPB, % OR % LEL)
Figure 2-1: Front Panel Controls & LEDs (0109PM)
Receiver modules also include the following standard features:
1.
Three SPDT alarm relays, switch programmable for operating configuration.
2.
One SPDT trouble relay, for remotely indicating that the TROUBLE alarm is activated.
3.
Isolated 4-20 mA output signal proportional to gas concentration.
4.
Isolated remote reset input terminals for remote alarm acknowledgment.
5.
Power for operation of an A11 sensor/transmitter located up to 1000 feet away.
Receivers are housed in a compact noryl case designed for mounting to a 35 x 7.5 mm DIN
rail. The rails are supplied in standard ATI system enclosures, or can be supplied by a system
integrator as part of a custom panel arrangement. A spring clip on the back of the enclosure
holds the module to the rail. To remove from a rail, slide a thin bladed screwdriver through the
black loop at the top of the module and pull outward until the module releases from the rail. To
mount to the rail, reverse the procedure. When mounting, slide the bottom of the module against
the bottom of the rail before extending the spring clip.
Electrical Connection
Electrical connections to the receiver are made to two pluggable terminal blocks as shown in
Figure 2-2. Transmitter connections must be made at the time of installation, while power and
horn connections are factory wired when the receiver is part of a complete system. Connections
should be made and checked before power is applied to the module. Never connect or alter
connections while power is on.
