3600I
Page: 40
•
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 24: 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 43). The maximum permitted load
resistance is 600
Ω
.
Table 25: 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%
•
HART Protocol
The HART is a digital communication signal at a low level on
top of the 0-20mA. This is a bi-directional field communication
protocol used to communicate between intelligent field
instruments and the host system. HART is available in wiring
options 2 and 3.
Through HART protocol the detector can:
•
Display set-up
•
Reconfigure the set-up
•
Display detector status and definition
•
Perform detector diagnostics
•
Troubleshoot
For more details refer to
HART Manual 777030
.
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