Sierra Monitor Corporation 3600I, Инструкция по эксплуатации

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3600I
Page: 56
4 The set-up parameters must be verified (as described in
Using the 0-20mA Interface for Alerting
on page 55, point 1 and in
Using the Alarm
Relay Contact for Alerting
on page 56, point 1) and the function of the 3600 Flame
Detector (flame detection, function of the
0-20mA interface, relay functions) must be checked completely.
E.1.2.2 USING THE 0-20MA INTERFACE FOR ALERTING
1 The following parameters shall be set:
•
AUTOMATIC BIT test = on
•
Connected to 0-20mA Terminals
2 The following allowed output current must be supervised with an accuracy of ± 5%:
•
Normal State = 4mA
•
Warning State = 16mA
•
Alarm State = 20mA
3 The output current must be supervised regarding the over-and under run of the 0-
20mA.
4 The 0-20mA can be used as low and high demand mode.
E.1.2.3 USING THE ALARM RELAY CONTACT FOR ALERTING
1 The following parameters shall be set:
•
AUTOMATIC BIT Test = on
•
Connected to N.C contact of Alarm Relay Terminals
•
Connected to Fault Relay Terminals
2 The relay contacts (“alarm” – and “faulty relay”) must be protected with a fuse rated
at 0.6 of the nominal specified relay contact current.
3 The maximum contact rating that is allowed per SIL-2 is 30VDC.
4 It is to be considered that the contact of the Alarm Relay opens if there is a fire
alarm.
5 During the forwarding and evaluation of the alarm it must be noted that the relay
contact opens.
6 The alarm relay can be used as low demand only.
E.1.2.4 OTHER
1 The complete function of the flame detector (flame detection, function of the 0-
20mA interface, the relays) must be examined at least every six or twelve months
(see
Safety Relevant Parameters
on page 55, when the flame detector must be
switched OFF and ON.
2 The window of the sensor must be examined at appropriate time intervals for partial
contamination.
3 The HART and the RS 485 interfaces must not be used for the transmission of the
safety-related data.