Spectrex 20/20U (UB) - UV Flame Detector - Manual (Page 25)

Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004
17
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%
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.