Det-Tronics OPECL Infrared Hydrocarbon Gas Detector - Manual (Page 18)

16 95-8556 10.1
24 VDC
+ –
24 VDC
+ –
–24 VDC
–24 VDC
+24 VDC
+24 VDC
CALIBRATE
+ 4-20 MA
– 4-20 MA
RS-485 A
RS-485 B
RELAY POWER
FAULT
LOW ALARM
HIGH ALARM
1
2
3
4
5
6
7
8
9
10
11
12
13
NO USER CONNECTION
+ –
4 to 20 MA
B2053
* TOTAL LOOP RESISTANCE = 250 OHMS MINIMUM, 600 OHMS MAXIMUM.
*
Figure 15—Detector Wired for Isolated 4 to 20 ma Current Output
(Sourcing)
24 VDC
+ –
24 VDC
+ –
–24 VDC
–24 VDC
+24 VDC
+24 VDC
CALIBRATE
+ 4-20 MA
– 4-20 MA
RS-485 A
RS-485 B
RELAY POWER
FAULT
LOW ALARM
HIGH ALARM
1
2
3
4
5
6
7
8
9
10
11
12
13
NO USER CONNECTION
+ –
4 to 20 MA
B2052
* TOTAL LOOP RESISTANCE = 250 OHMS MINIMUM, 600 OHMS MAXIMUM.
*
Figure 14—Detector Wired for Isolated 4 to 20 ma Current Output
(Sinking)
–24 VDC
–24 VDC
+24 VDC
+24 VDC
CALIBRATE
+ 4-20 MA
– 4-20 MA
RS-485 A
RS-485 B
RELAY POWER
FAULT
LOW ALARM
HIGH ALARM
NO USER
CONNECTION
1
2
3
4
5
6
7
8
9
10
11
12
13
A2203
24 VDC
+
–
250 TO 500 OHMS
Figure 17—Wiring the Model OPECL for Benchtop Testing/
Programming Using HART Protocol
–24 VDC
–24 VDC
+24 VDC
+24 VDC
24 VDC SHIELD
24 VDC SHIELD
COM 1 A
COM 1 SHIELD
COM 1 B
COM 2 A
COM 2 B
COM 2 SHIELD
CALIBRATE
1
2
3
4
5
6
7
8
9
10
11
12
13
A2087
Figure 16—Wiring Terminal Identification
for Eagle Quantum Premier OPECL