36
Oxygen Probe to Controller Connection Detail
Before applying power to the unit ensure that the probe heater output is not attempting to drive into a
short circuit by checking between terminals PN12 and PN13 using a resistance meter. The expected
resistance with an oxygen probe fitted should be greater than 15 ohms.
Note that there are no connections to terminals PN14 and PN15 for the software version described in
this manual.
After ensuring all connectors are correctly fitted, secure the insulating terminal cover to the unit.
Inlet Temperature Sensor
The Nexus PPC5000 system allows direct connection of an Fireye 3035 inlet temperature sensor.
This is provided with the zirconium probe kit itself. The cabling between the units is via an overall
shielded 2 conductor 22AWG-7/30, 300V 80°C (7/0.2mm) PVC insulated cable. Wiring must com-
ply with all applicable codes, ordinances and regulations and where required, must comply with
NEC Class 1 (Line Voltage) wiring.
10
9
8
7
6
5
4
3
1
2
PROBE CONNECTOR
(REMOVABLE)
INTERNAL PROBE CONNECTORS
SYSTEM CONNECTORS
PIN CONNECTION
1 EARTH
2 ZIRCONIUM CELL OUTPUT -VE
3 ZIRCONIUM CELL VE
4 ZIRCONIUM CELL TEMP. -VE
5 ZIRCONIUM CELL TEMP. +VE
6 FLUE TEMP. THERMOCOUPLE -VE
7 FLUE TEMP. THERMOVE
8 PROBE HEATER >24VAC
9 PROBE HEATER >24VAC
10 EARTH
CABLE TYPE
SCREEN MESH
7/0.2mm
7/0.2mm
TYPE K COMP. CABLE (BLUE)
TYPE K COMP. CABLE (WHITE)
TYPE K COMP. CABLE (BLUE)
TYPE K COMP. CABLE (WHITE)
16/0.2mm
16/0.2mm
SCREEN MESH
OXYGEN PROBE PCB AND CABLE TYPES
FUEL\AIR RATIO CONTROLLER
OXYGEN PROBE
(SEE ABOVE)
EARTH
PN3
PN4
PN7
PN8
PN5
PN6
PN12
PN13
EARTH
1
2
3
4
5
6
7
8
9
10
OXYGEN PROBE
TRANSFORMER
ETC CO221424
0
115
110-120VAC
PN10
PN11
INLET TEMP + PN2
INLET TEMP - PN1
HG221473
Inlet air
temperature
sensor.
