MPD Operating Manual
14
2.4 Wiring
NOTe:
To maintain EMC integrity, wiring must be shielded by either an integral
shield or run through conduit or pipe. Shield should provide 90%
coverage.
The MPD Sensor must be operated from a transmitter supplied by a Class 2 Power
Supply.
For remote sensor installations, ensure the resistance of the wire is considered
in the interface of the sensor to maintain proper operation. For XNX the following
values should not be exceeded:
AWG
Metric Wire Gauge
(mm
2
)
MPD CB1 Sensors
(distance in meters)
MPD IC1, IV1 & IF1 Sensors
(distance in meters)
24 0.25 12 (47 ft.) 30 (97 ft.)
22 20 (65 ft.) 50 (162 ft.)
20 0.5 30 (97 ft.) 80 (260 ft.)
18 50 (162 ft.) 120 (390 ft.)*
16 1.0 80 (260 ft.)* 200 (650 ft.)*
* Frequency of zero calibration may increase due to the changes in wire resistance at different
temperatures
.
2.4 Cable Connections
The sensor is connected by three wires:
Connections Color Code
Sensitive (S) Brown
Non-sensitive (NS) Blue
Common (01) White
A 3-way terminal block is provided in the terminal enclosure to enable connection
to be made to the control unit. Earthing facilities are available if required.
NOTe
The black and red wires from the MPD are not used with the XNX mV Personality
Board. Insure they are properly isolated from live connections. DO NOT CUT.
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