Detcon IR-700 - Field Wiring; Operation

Model IR-700
IR-700 Instruction Manual Rev. 4.3 Page 11 of 46
NOTE: The Detcon Warranty does not cover water damage resulting from water leaking into
the enclosure through the conduit connections. However, since the electronics are 100% epoxy
encapsulated, only the wire terminations could get wet. Moisture could cause abnormal
operation and possibly corrosion to the terminal connections, but permanent damage to the sensor
would not be expected.
Plug any unused
ports
Explosion Proof
Housing
(J-Box)
Drain
IR-700
Sensor
Assembly
Conduit
"T"
EYS Seal Fitting
(+)
mA
(-)
A(+)
B(-)
Wiring to
Sensor Assembly
Wht
Blu
Red
Grn
Blk
Explosion
Proof
Junction Box
(+)
mA
(-)
N/U
A(+)
B(-)
Customer
Supplied Wiring
Transient Protection Module
(TPM) P/N 500-003087-100
Mount TPM in Explosion
Proof Enclosure to ground
unit properly. Mount to
bottom of enclosure using
6-32 screws.
+
6-Pin Pheonix Plug
P/N 306-175705-100
detcon inc.
LEL
MODEL
IR-700
Figure 13 Typical Installation
NOTE: Any unused ports should be blocked with suitable ¾” male NPT plugs. Detcon Supplies
one ¾” NPT male plug with their accessory J-box enclosures. If connections are other than ¾”
NPT, use an appropriate male plug of like construction material.
2.6 Field Wiring
Detcon Model IR-700 combustible hydrocarbon gas sensor assemblies require three conductor connections
between power supplies and host electronic controller’s 4-20mA output, and 2 conductor connections for the
Modbus™ RS-485 serial interface. Wiring designations are + (DC), – (DC), mA (sensor signal), and Modbus™
RS-485 A (+), and B (-). Maximum wire size for termination in the Detcon J-Box accessory is 14AWG.