ST650EX / ST650-CO
2
/ ST350EX
v3.16
13
WIRING DIAGRAM ST650EX-REMOTE:
For mounting on high locations, the ST650EX is optionally available in a REMOTE version. This
version features two junction boxes in which the sensor and the transmitter are mounted
separately. The sensor has to be installed in a high location (where higher gas concentrations
can be expected). The transmitter box can be mounted at normal height at approximately 1.5
meters above ground.
Between the sensor and the transmitter boxes a 3-core cable (shielded) and tubing should be
used. This configuration should be connected as follows:
Temperature range remote version:
The standard remote version can be used within a temperature range up to 60°C (T6) (with
sensor type 3, 6, 25 and 41, SC#, IRs, PID). The high temperature remote version (with HT
sensor) can be used within a temperature range up to 120°C (T3). Only the sensor junction box
(without transmitter/PCB) is allowed to be mounted within a high temperature environment.
The high temperature remote version requires a heat resistance cable, a blind plug and cable
gland, specified temperature > 130°C.
Connector CON 1 Connector CON 4
Sensor type: GND Heater Sense A+ B -
3, 6, 25, 41, SCA,
SCF, SCV, PID
Red Blue Green - -
IRs Red Blue Green Black White
HT sensor White Pink Green - -
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