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Installing accessories
Relay module
Intended use
Relay module – to order:
— For switching of actuators, alarm generators, etc. on the basis of the measured
gas concentration.
— The unit must be disconnected from the mains!
Preparing the docking station
● Remove any existing explosion-protection label from the docking station.
1 Release the measuring unit with an Allen key by turning the eccentric catches
counter-clockwise ( ⇒ = approx. 180
o
).
2 Slide the measuring unit halfway upwards and then pull it forward out of the dock-
ing station.
Converting the measuring unit
3 Bend the snap-hooks on the cover of the measuring unit slightly outwards to re-
lease them.
● Remove the cover.
4 Plug the connection cable into the male connector behind the display, ensuring
that the cable is not twisted.
● Place the relay module on the measuring unit and snap it into position on both
sides.
In order to make this step easier, the relay cover may be removed.
Caution:
If a Polytron 7000 is subsequently equipped with the relay module and/or
the pump module, the complete unit loses its explosion-protection approval.
The user must ensure that no related approval markings are left on the Poly-
tron 7000. The explosion-protection markings has to be removed from the
transmitter.
The use of the Polytron 7000 with a pump module and/or relay module
installed is not permitted in explosion-hazard areas! Explosion hazard!
Note:
For operation with the relay module, the transmitter must have a 3-wire con-
nection to the control unit.
Caution! Use only a 5 mm Allen key without a ball head.
5 Attention:
Take care that pressure is applied only to the sleeve of measuring unit.
Pressure on the inner structure can damage the unit.
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