Erma Electronic SSI 9002, Инструкция по эксплуатации

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4. Electrical connections
4.1. General instructions
• It is forbidden to plug or unplug connectors with voltage applied
• Attach input and output wires to the connectors only without voltages
applied
• Cords must be provided with sleeves
• Attention must be paid that the power supply voltage applied will
agree with voltage noticed at the name plate.
• The instrument has no power-on switch, so it will be in operation as
soon as the power is connected.
4.2. Hints against noisy environment
All inputs and outputs are protected against noisy environment and high voltage
spikes. Nevertheless the location should be selected to ensure that no capacitive or
inductive interference can have an effect on the instrument or the connection lines.
It is advisable:
• To use shielded cables.
• The wiring of shields and ground (0V) should be star-shaped.
• The distance to interference sources should be as long as possible.
If necessary, protective screen or metal enclosures must be provi-
ded.
• Coils of relays must be supplied with filters.
• Parallel wiring of input signals and AC power lines should be avoided.
4. Electrical connections
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