Detcon 12B - Manual (Page 6)

Model 12B
12B Control Module Instruction Manual Rev 1.4 Page 2 of 12
2.0 Specification
Range
0-99 ppm/% is typical but varies according to application
Accuracy/Repeatability
± 2% F.S.
Operating Temperature
–40° F to +175° F
Input Power
24 VDC standard; 12 VDC optional
Power Consumption
<3 watts (no alarms)
5 watts (full alarm peak load)
Warranty
One year
Five year fixed fee service policy
Outputs
Analog 4-20 mA DC
Serial RS-485 Modbus™
Relays
Contacts include common with jumper selectable choice of normally open or normally closed for four
alarms
Resistive load: 5A, 250 VAC; 5A, 30 VDC
Inductive load: 2A, 250 VAC; 2A, 30 VDC
Max operating current: 5A
3.0 Controller models
Model 12B control modules are compatible with any 4-20 mA signal input and therefore are interchangeable.
This design flexibility allows a single module to be user programmed to be compatible with any of the gases or
ranges listed below via rotary dip switches or jumper tabs. A change of face plate which reflects the proper
labeled gas is the only other change that is required. The Model 12B control module model numbers listed
below are shipped preconfigured for the gases and ranges as listed.
Model Gas Standard Range Optional Ranges
CH-12B combustible gas 0 - 100 % LEL 0 - 1.0
O2-12B O2 oxygen deficiency 0 - 25.0 % 0 - 10
NH-12B NH3 ammonia 0 - 100 ppm 0 - 25
HC-12B HCN hydrogen cyanide 0 - 10.0 ppm 0 - 50
PH-12B PH3 Phosphine 0 - 100 ppm 0 - 10.0
HL-12B HCL hydrogen chloride 0 - 10.0 ppm 0 - 50.0
HS-12B H2S hydrogen sulfide 0 - 100 ppm 0 - 99.9