Appendix k, Wiring – Det-Tronics UD10 FlexVu Explosion-Proof Universal Display Unit User Manual

Page 53

4.2

K-1

95-8661

AppenDix K

UD10 with NTmOS H

S DETECTOR

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For complete information regarding the nTMoS Gas Detector, refer to instruction manual 95-8604.

WirinG

4000

3500

3000

2500

2000

1500

1000

500

Power Supply Voltage

Dist

ance in f

UD10 with PIRECL/OPECL/Model 505/NTMOS

12
14
16
18

AWG

Wire Size

Notes: Maximum cable length from power source to UD10 is 2000 feet.

Maximum cable length from UD10 to detector/STB termination box is 2000 feet.

instAllAtion notes

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never use silicone grease with the nTMoS
detector.

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A junction box spacer or standoff may be used to
increase the distance between the device and the
mounting surface, thereby facilitating installation
and use of the ampoule calibrator.

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For non-HART applications, the nTMoS detector
can be wired to the Sensor Connector terminals
(J3) on the UD10 module. If HART communication
will be used, the nTMoS detector must be wired
to the optional nTMoS Connector Board, located
on the inside bottom of the UD10 housing. Refer
to the appropriate wiring diagram.

proper Termination of Orange and grey wires
The orange and grey wires on the NTMOS detector are

for factory use only. Proper field termination of these

wires can be accomplished in any of the following ways:
– If wiring to optional NTMOS Connector Board, use the

terminals provided (grey to COM 1 & orange to COM 2).

– If codes allow, they can be taped off and left

unconnected.

– Connect both wires to the “Shield” terminal (J3-1).
– Connect both wires to Power Supply Minus (24 Vdc –).
– Connect to unused terminals in the STB Sensor

Termination Box.