Manual

TM 40/40R, Rev (4) November 2010
Troubleshooting 43
•
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 21: Contact Ratings
Relay
Name
Type Normal
Position
Maximum
Ratings
Alarm DPST N.O., N.C.
2A at 30
VDC or
0.5A at
250 VAC
Auxiliary SPST N.O.
5A at 30
VDC or
250 VAC
Fault * SPST
N.C. or
N.O
5A at 30
VDC or
250 VAC
Notes:
• 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.
• * 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 47).
The maximum permitted load resistance is 600Ω.
Table 22: 20 mA Current Output
State Output
Fault 0 +1 mA
BIT Fault 2 mA±10%
Normal 4 mA±10%
Warning 16 mA 5%
Alarm 20 mA±5%