Det-Tronics MOS H2S Gas Sensor - Manual (Page 8)

95-8532 1.4 6
AUX RELAY LOW RELAY HIGH RELAY NC COM NO NC COM NO NC COM NO
FLT RELAY
S POWER
RESET
PW
IN
NO COM NC
–
+
CAL
HIGH ALARM RELAY
NORMALLY OPEN CONTACT
HIGH ALARM RELAY
COMMON CONTACT
HIGH ALARM RELAY
NORMALLY CLOSED CONTACT
LOW ALARM RELAY
NORMALLY OPEN CONTACT
LOW ALARM RELAY
COMMON CONTACT
LOW ALARM RELAY
NORMALLY CLOSED CONTACT
AUXILIARY ALARM RELAY
NORMALLY OPEN CONTACT
AUXILIARY ALARM RELAY
COMMON CONTACT
AUXILIARY ALARM RELAY
NORMALLY CLOSED CONTACT
FAULT RELAY
NORMALLY OPEN CONTACT
FAULT RELAY
COMMON CONTACT
FAULT RELAY
NORMALLY CLOSED CONTACT
* SPARE
POWER
COMMON
POWER
+ 24 VDC
EXTERNAL
RESET
NOT USED
NOT USED
S
POWER OUT
–
+
+
–
* SPARE
POWER
COMMON
POWER
+ 24 VDC
+ 4 TO 20 MILLIAMPERE
OUTPUT SIGNAL
– 4 TO 20 MILLIAMPERE
OUTPUT SIGNAL
* THE SPARE TERMINALS ARE CONNECTED TOGETHER INTERNALLY
AND ARE NOT CONNECTED TO ANY OTHER TERMINALS INTERNALLY
C1904
**
**
THESE TERMINALS ARE CONNECTED INTERNALLY **
Figure 5—Field Wiring Terminals, Transmitter with Relays
AUX RELAY LOW RELAY HIGH RELAY NC COM NO NC COM NO NC COM NO
FLT RELAY
S POWER
RESET
PW
IN
NO COM NC
–
+
CAL
S
POWER OUT
–
+
+
–
C1668
–
–
+
+
–
+
+ 24 VDC
+ 24 VDC
EXTERNAL
RESET
4 TO 20 MA
FAULT RELAY CONTACTS
SEE NOTES 2, 3
HIGH ALARM RELAY CONTACTS
SEE NOTES 2, 4
LOW ALARM RELAY CONTACTS
SEE NOTES 2, 4, 5
AUXILIARY ALARM RELAY CONTACTS
SEE NOTES 2, 4, 5
NOTE 1 THE SENSOR CONNECTS TO A PLUG ON THE OPPOSITE SIDE
OF THE TRANSMITTER FROM THE ELECTRICAL TERMINALS.
NOTE 2 ALL RELAY CONTACT DESIGNATIONS INDICATE RELAY STATE
WITH NO POWER APPLIED — RELAYS DE-ENERGIZED.
NOTE 3 WITH POWER APPLIED AND NO FAULTS DETECTED,
THE FAULT RELAY IS NORMALLY ENERGIZED.
NOTE 4 ALARM RELAYS ARE PROGRAMMABLE AS A GROUP
TO BE EITHER NORMALLY ENERGIZED OR NORMALLY DE-ENERGIZED
WITH NO ALARMS DETECTED. REFER TO THE "SET-UP"SECTION OF THIS MANUAL.
NOTE 5 LOW AND AUXILIARY ALARM RELAYS ARE PROGRAMMABLE
AS A GROUP TO BE LATCHING OR NON-LATCHING.
NOTE 6 THESE TERMINALS ARE CONNECTED INTERNALLY.
SEE NOTE 1
SEE NOTE 6
MOS H2S SENSOR
NOT USED
NOT USED
Figure 6—A Typical System - Infiniti Transmitter with Isolated Current Output and Relay Outputs