18
£
The pressure/temperature cabling must
be overall shielded 4-conductor PVC
insulated 22AWG-7/30, 300V 80°C
(7/0.2mm) wire. Wiring must comply
with all applicable codes, ordinances
and regulations and where required
must comply to NEC Class 1 (Line
Voltage) wiring.
Since this cable may
be run in conduit with high voltage wiring, its voltage rating must exceed the maximum voltage
carried by any other cable in the same conduit.
Connect the cable shield at both ends, using the clamping bar at the controller end. Make all connec-
tions at the sensor first.
Auxiliary modulation input:
The auxiliary modulation input
cabling must be overall shielded
mulit-conductor (number of con-
ductors as required by the relevant
sensor) PVC insulated 22AWG-7/
30, 300V 80°C (7/0.2mm) wire.
Wiring must comply with all appli-
cable codes, ordinances and regula-
tions and where required must comply to NEC Class 1 (Line Voltage) wiring. Since this cable may be
run in conduit with high voltage wiring, it’s voltage rating must exceed the maximum voltage carried
by any other cable in the same conduit.
UV Flame Sensor
In the case of a non-self checking scanner
(UV1A, UV2, UV8A, 45UV3), connect the
scanner leads to terminals PB1 and PB2. Refer to
bulletin SC-102 for more information.
For a self checking scanner (45UV5--1007, -1008, -1009), connect the signal leads (red) to terminals
PB1 and PB2, connect the shutter leads (black) to the Hot and Neutral of the main power supply ter-
minals PB5 and PB4. Refer to bulletin SC-101 for extended wire run recommendations and wire
type.
Mount the UV sensor in such and way that an ignition spark will not simulate the presence of a
flame.
IR Flame Sensor
Install and wire the 48PT2 IR scanner according
to the instructions supplied with the scanner in
Bulletin SC103.
GAS PRESS TEST PE 19
CABLE CLAMP
BODY
NX 1020
GAS
PRESSURE
SENSOR
4
3
2
1
GAS PRESS GND PE 18
GAS PRESS IN PE 17
GAS PRESS SUPP PE 16
LOOP POWERED
4-20mA SENSOR
CABLE CLAMP
+
-
24V
+
-
OR EXT.
SELF-POWERED
4-20MA SENSOR
AUX MOD SUPPLY PE 13
AUX MOD IN PE 14
AUX MOD GND PE 15
UV
SENSOR
PB2
PB1
BLACK L1 (PB5), L2 (PB4)
SHUTTER
45UV5 -1007, -1008, -1009
UV TUBE
RED (PB1, PB2)
ON WIRING
BASE NX1466
IR
SENSOR
PF21
PF22
