Spectrex 40/40L-LB UV/IR Flame Detector Series - Manual (Page 57)

TM 40/40L, Rev (6) February 2013
Troubleshooting 45
wiring arrangement is identified on the detector by the
part number (see Model and Types on page 2).
 Option 1: Power, RS-485, 0-20mA (Sink), Fault I
Relay (N.C), Alarm Relay, (N.O) (see Figure 7).
 Option 2: Power, RS-485, 0-20mA (Source) and HART
protocol, Fault Relay (N.O), Alarm Relay, (N.O), (N.C).
 Option 3: Power, RS-485, 0-20mA (Source) and HART
protocol, Fault Relay (N.O), Alarm Relay (N.O, N.C).
 Option 4: Power, RS-485, Fault Relay (N.C), Auxiliary
Relay (N.O), Alarm Relay, (N.O).
 Option 5: Power, RS-485, Fault Relay (N.O), Auxiliary
Relay (N.O), Alarm Relay, (N.O).
Electrical
Outputs
 Dry Contact Relays
Table 20: Contact Ratings
Relay Name Type Normal
Position Maximum
Ratings
Alarm SPDT N.O., N.C. 2A at 30 VDC
Auxiliary SPST N.O. 2A at 30 VDC
Fault (see
Notes 1 and 2) SPST N.C. or N.O 2A at 30 VDC
Notes:
1. The Fault relay (in wiring options 1, 2, 4) is
normally energized closed during normal operation
of the detector. The relay is de-energized open if a
fault condition or low voltage situation occurs.
2. In wiring options 3, 5 the relay is normally
energized open during normal operation of the
detector. The relay is de-energized close contact if
a fault condition or low voltage situation occurs.
 0-20mA Current Output: The 0-20mA can be Sink or
Source according to the wiring option source (see
General Instructions for Electrical Wiring on page 49).
The maximum permitted load resistance is 600Ω.
Table 21: 20 mA Current Output
State Output
Fault 0 +1 mA
BIT Fault 2 mA ±10%
Normal 4 mA ±10%
IR 8 mA ±5%
UV 12 mA ±5%
Warning 16 mA ±5%
Alarm 20 mA ±5%