Det-Tronics R8471J Single Channel Gas Controller, OPECL - Manual (Page 6)

1.1 95-8572 4
Terminal 3 – Chassis ground. Connect the
cable shield to this terminal.
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 4 – Connect to the positive (+) side of
the 18 to 32 Vdc power source.
Terminal 5 – Connect to the negative (–) side
of the dc power source.
Terminal 6 – Make no connections to this
terminal.
Terminal 7 – 4 to 20 mA dc signal input from
OPECL.
Terminal 8 – A normally open momentary
closure switch can be connected
between this 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.
Premium controller – The relay outputs (terminals 9 to
16) are programmed for the desired operation using the
procedure described in the “Controller Programming”
section of this manual.
Base controller – Connections to open collector
transistor outputs are made at terminals 10, 12, 14, and
16. Terminals 9, 11, 13, and 15 are not used. See Figure
6 for an example of a typical connection to an open
collector transistor output.
NOTE
External equipment that can generate transients
when switching (such as relays)
must have a
transient suppression device (diode) properly
connected across the coil at the time of installation.
This will safeguard the output transistors of the
controller against possible damage. Figure 6
illustrates an inductive load with a diode used for
transient suppression.
ISOLATED OUTPUT
CURRENT LOOP
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 32VDC
GROUND
POWER
SIGNAL
HIGH
ALARM
AUXILIARY
ALARM
LOW
ALARM
FAULT
RESET
24
VDC
+
–
24
VDC
+
–
2
4-20 MA
A2413
R8471J CONTROLLER
*
* NO CONNECTION
OC = OPEN COLLECTOR OUTPUT
(BASE MODEL ONLY)
–24 VDC
+24 VDC
– 4-20 MA
1
2
3
4
5
6
7
8
9
10
11
12
13
MODEL OPECL
GAS DETECTOR
+ 4-20 MA
–24 VDC
+24 VDC
2
1
NOTES: 1 INTERNAL JUMPER REQUIRED
FOR NON-ISOLATED CURRENT
OUTPUT (SINGLE POWER
SUPPLY).
2 250 OHM RESISTOR REQUIRED.
Figure 5—A Typical System with Relay Outputs and Isolated Current Output