Spectrex 20/20L (LB) - UV/IR Flame Detector - Manual (Page 27)

Spectrex Inc. - SharpEye TM UV/IR Flame Detector Manual – TM20/20LB Rev E, August 2004
19
e. Electrical Outputs
:
• Output Relays:
Table 7. Dry Contacts Relays Ratings
Relay
Name Type Normal position Maximum Ratings
Alarm SPDT N.O. N.C. 2A at 30VDC or 0.5A at 250 VAC
Accessory SPST N.O. 5A at 30VDC or 250VAC
Fault SPST N.C. 5A at 30VDC or 250 VAC
• 4-20mA Current Output stepped Levels at different detector states (on
terminals 11 and 12):
Fault: 0mA
+0.5mA
Bit Fault: 2mA ±10%
Normal: 4mA ±5%
IR Detection: 8mA ±5%
UV Detection: 12mA ±5%
Warning: 16mA ±5%
Alarm: 20mA ±5%
o
The 4-20mA output is a current source type. The signal is driven via
terminal 12 through the load to terminal 11 that should be at RTN
level (when connected to terminal 2)
o
Maximum load permitted resistance for the 4-20mA is 600 ohm.