Detcon PI-500 User Manual
Page 16
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3.4.4 Installation Procedure
a)
Securely mount the sensor junction box in accordance with recommended practice. See dimensional drawing (Fig. 2).
b)
Remove the junction box cover and un-plug the control circuit by grasping the two thumb screws and pulling out-
ward. Observing correct polarity, connect the DC power f ield wiring to the terminals labeled “+” and “–”. Then
connect the 4-20 mA return wire (reference f igure 3). Reinstall cover.
3.4.5 Remote Mounting Applications
Some sensor mounting applications require that the gas sensor head be remotely mounted away from the sensor trans-
mitter. This is usually true in instances where the gas sensor head must be mounted in a location that is diff icult to
access. Such a location creates problems for maintenance and calibration activities. Detcon provides the PI-500 sensor
in a remote-mount conf iguration in which the sensor (Model PI-500-RS) and the transmitter (Model PI-500-RT) are pro-
vided in their own condulet housing and are interfaced together with a four conductor cable. Reference f igure 4 for
wiring diagram.
PI-500 Toxic Gas Sensors PG.16
WHT
BLK
YEL
BLU
mA
VDC Power In
4-20 mA Output
Sensor
Base Connector Board
Figure 3
4 3/4"
3/4" NPT
1/4" Dia.
Mounting Holes
7 1/4"
6 1/8"
5 1/2"
3/4" NPT
Rain
Shield
2"
2 1/8"