Det-Tronics R8471NH34001,2,3 Single Channel Gas Controller, NH3 User Manual
Page 14
95-8529
1.1
12
Terminal 3 –
Connect to chassis (earth)
ground. Ground the cable
shield at this terminal.
Terminal 4 –
Connect to the positive (+) side
of the 24 vdc power source.
Terminal 5 –
Connect to the negative (-)
side of the dc power source.
NOTE
If local wiring codes permit and if a ground fault
monitoring system is not being used, the minus
side of the dc power source can be connected
to chassis (earth) ground. Alternatively, a 0.47
microfarad, 100 volt capacitor can be installed
(terminal 5 to ground) for best immunity against
electromagnetic interference.
Terminal 6 –
Connect to the red (+) lead of
the sensor.
Terminal 7 –
Connect to the black (-) lead of
the sensor.
Terminal 8 –
A normally open momentary
c l o s u r e s w i t c h c a n b e
c o n n e c t e d b e t w e e n t h i s
terminal and the negative (-)
side of the power source for
remote reset.
Terminals 9 and 10 – High Alarm Output.
Terminals 11 and 12 – Auxiliary Alarm Output.
Terminals 13 and 14 – Low Alarm Output.
Terminals 15 and 16 – Fault Output.
CURRENT OUTPUT
CHASSIS GROUND
POWER
SENSOR
EXTERNAL RESET
HIGH ALARM
HIGH ALARM / OC
AUX. ALARM
AUX. ALARM / OC
LOW ALARM
LOW ALARM / OC
FAULT
FAULT / OC
1
3
4
5
6
7
8
9
10
11
12
13
14
15
16
–
+
+
–
+
–
18 TO 32
VDC
POWER
SIGNAL
HIGH
ALARM
AUXILIARY
ALARM
LOW
ALARM
FAULT
RESET
24
VDC
+
–
SENSOR
2
R8471 SERIES CONTROLLER
4 TO 20 MA
BLK
RED
GREEN
+
–
OC = OPEN COLLECTOR OUTPUT
(BASE MODEL ONLY)
Figure 11—A Typical System - Controller with Relay Outputs and
Non-Isolated Current Output
CURRENT OUTPUT
CHASSIS GROUND
POWER
SENSOR
EXTERNAL RESET
HIGH ALARM
HIGH ALARM / OC
AUX. ALARM
AUX. ALARM / OC
LOW ALARM
LOW ALARM / OC
FAULT
FAULT / OC
1
3
4
5
6
7
8
9
10
11
12
13
14
15
16
–
+
+
–
+
–
18 TO 32
VDC
POWER
SIGNAL
HIGH
ALARM
AUXILIARY
ALARM
LOW
ALARM
FAULT
RESET
24
VDC
+
–
SENSOR
2
R8471 SERIES CONTROLLER
4 TO 20 MA
BLK
RED
GREEN
+
–
24
VDC
+
–
OC = OPEN COLLECTOR OUTPUT
(BASE MODEL ONLY)
Figure 12—A Typical System - Controller with Isolated
Current Output