DM-634C Oxygen Sensor Assembly
DM-634C O2 Sensor Instruction Manual Rev. .066
Page 8 of 25
3.5.4
Accessibility
Consideration should be given to easy access by maintenance personnel as well as the consequences of close
proximity to contaminants that may foul the sensor prematurely.
Drain
Conduit
"T"
EYS Seal Fitting
PGM 1
PGM 2
MODEL DM-534C
HOUSTON, TEXAS
FLT CAL
MicroSafe O2 Gas Sensor
ALM ALM
TM
Figure 6
Typical Installation
NOTE:
For products utilizing the aluminum junction box option, the conduit seal shall be
placed at the entry to the junction box (see Figure 6 as an example). For products utilizing
the stainless steel junction box option, the conduit seal shall be placed within 18” of the
enclosure. Crouse Hinds type EYS2, EYD2 or equivalent are suitable for this purpose.
3.5.5
Installation Procedure
a)
Remove the junction box cover and un-plug the control circuit by grasping the two thumb
screws and pulling outward.
b)
Securely mount the sensor junction box in accordance with recommended practice. See
dimensional drawing (Figure 7).
c)
Observing correct polarity, terminate 3 conductor field wiring, RS-485 wiring, and applicable
alarm wiring to the sensor base connector board in accordance with the detail shown in Figure
3. Normally open and normally closed Form C dry contacts (rated 5 amp @ 120VAC; 5 amp
@ 30VDC) are provided for Fault, Alarm 1, and Alarm 2.
d)
Position gold plated jumper tabs located on the connector board in accordance with desired
Form C dry con- tact outputs: NO = Normally Open; NC = Normally closed (see Figure 8).
