GDA 490: Multi way Control Unit for the GDA 290

The GDA 490 is designed to control 1-8 GDA 290 sensors for applications where chiller/refrigerant plant is using PROPANE as the refrigerant gas. The control unit derives the 24 VDC required for the sensors from the mains i/p and activates a local 24 VDC o/p on alarm to drive a sounder/flasher AVR-20. The sounder flasher can be muted from the front panel. The alarm also activates a DPCO relay; the contacts may be used to shut down and pump down the system. The alarm is indicated on the front panel by LED’s.

DESIGNED, MANUFACTURED and SUPPORTED by GAS DETECTION AUSTRALIA.

GDA 4011: Flush Mount Single Channel Gas Detection Controller

This is a flush wall mounted (Clipsal GPO) single channel control unit. It interfaces to all the GD a series of 4-20mA sensors. There are 3 relay o/p’s, Alarm 1, 2, and fault. These relays are SPCO. The backlit LCD display indicates current gas concentration and alarm status. There is an internal sounder which can be muted from the front panel. The unit requires 24v dc.

DESIGNED, MANUFACTURED and SUPPORTED by GAS DETECTION AUSTRALIA.