ENMET ISA-M User Manual
Page 8
ENMET Corporation
ISA – M
6
4.3 Sensor Hook-up
The MOS sensor is connected to the ISA-M control unit with three conductor wiring, use the correct oiltight fitting.
Two conductors supply heater current to the sensor. The third conductor is a signal wire. Size of heater wire depends
on the distance between the particular sensor and the control unit. See Table 4.
Sensor wires correspond to the normal wire code:
orange – heater
brown – heater ground
blue – signal
Figure 4: Internal View of Sensor Wiring
N
OTE
: The three color-coded wiring attachments must be performed by the user when replacing the sensor.
Table 4: Recommended Wire Gauge
Distance from Sensor to Control Unit
Recommended Wire Gauge
250 feet
16 AWG
350 feet
14 AWG
Longer Distances
Contact Factory
C
AUTION
: After you mount and install the ISA – M, you must adjust the sensor heater voltage (see section 4.4).
Sensor Wiring
F
OR
812 / 813 / 814 S
ENSORS
Position
Function
Wire Color
1
Signal
(Blue)
2
Heater
(Orange)
3
Ground
(Brown)
Optional
Splash Shield
Sensor Wiring
Terminal