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the high reliability and long life for which the equipment has been designed and manufactured.
CAUTION
• Before removing a module, ensure that you are at the same electrostatic potential as the
equipment by touching the case.
• Handle the module by its front plate, frame or edges of the printed circuit board. Avoid
touching the electronic components, printed circuit board or connectors.
• Do not pass the module to another person without first ensuring you are both at the same
electrostatic potential. Shaking hands achieves equipotential.
• Place the module on an anti-static surface, or on a conducting surface which is at the same
potential as yourself.
• Do not place modules in polystyrene trays.
It is strongly recommended that detailed investigations on electronic circuitry should be carried
out in a Special Handling Area such as described in the IEC 60747.
5.5 External Connections
External connections are shown in Appendix G.
Electrical interface for telecommunication
The connector should be handled as follows:
• Insert the connector horizontally and tighten both upper and
lower screws alternately.
• Do not touch the connector pin with your bare hand.
In electrical interface to multiplexed communication circuit for GRL100- ∗∗∗∗ - ∗ 9- ∗∗ , the
earthing wire of electrical cable is connected to the earth terminal (E) of the relay as shown in
Figure 5.5.1, if required.
To Multiplexer
CH1
CH2
Figure 5.5.1
Connection of communication cable
235
6 F 2 S 0 8 5 0
Connector
Earthing wire
E
Screw
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