Ecograph T, RSG35 Electrical connection
Endress+Hauser 13
6 Electrical connection
6.1 Connection conditions
L
WARNING
Danger! Electric voltage!
‣
The entire connection of the device must take place while the device is de-energized.
‣
The mixed connection of safety extra-low voltage and dangerous contact voltage to the
relay is not permitted.
‣
Apart from the relays and the supply voltage, only energy-limited circuits according to
IEC/EN 61010-1 may be connected.
Danger if protective ground is disconnected
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The ground connection must be made before all other connections.
NOTICE
Cable heat load
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Use suitable cables for temperatures of 5 °C (9 °F) above ambient temperature.
Incorrect supply voltage can damage the device or cause malfunctions
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Before commissioning the device, make sure that the supply voltage matches the
voltage specifications on the nameplate.
Check emergency shutdown for device
‣
Provide suitable switch or circuit breaker in building installation. This switch must be
provided close to the device (within easy reach) and marked as a circuit breaker.
Protect the device from overload
‣
Provide overload protection (nominal current = 10 A) for power cable.
Incorrect wiring may result in the device being destroyed
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Note terminal designation on the rear of the device.
Energy-rich transients in the case of long signal lines
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Install suitable overvoltage protection (e.g. E+H HAW562) upstream.
6.2 Connection instructions
6.2.1 Cable specification
Cable specification, spring terminals
All connections on the rear of the device are designed as pluggable screw or spring
terminal blocks with reverse polarity protection. This makes the connection very quick and
easy. The spring terminals are unlocked with a slotted screwdriver (size 0).
Please note the following when connecting:
• Wire cross-section, auxiliary voltage output, digital I/O and analog I/O: max. 1.5 mm
2
(14 AWG) (spring terminals)
• Wire cross-section, mains: max. 2.5 mm
2
(13 AWG) (screw terminals)
• Wire cross-section, relays: max. 2.5 mm
2
(13 AWG) (spring terminals)
• Stripping length: 10 mm (0.39 in)
No ferrules must be used when connecting flexible wires to spring terminals.
Shielding and grounding
Optimum electromagnetic compatibility (EMC) can only be guaranteed if the system
components and, in particular, the lines - both sensor lines and communication lines - are
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