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
2
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
0
18
19
20
21
22
23
24
25
26
27
28
29
30
Power Supply Voltage
Dist
ance in f
t.
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.