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3
Electrical connections
WARNING – Bodily injury
– If the CMF310 controller (or CMF160 indicator) is used in a manner not specified by the Company, the protection provided
by the equipment may be impaired.
– Remove all power from supply, relay, any powered control circuits and high common mode voltages before accessing or
making any connections. Use cable appropriate for the load currents: 3-core cable rated 3 A and 75 °C (167 °F) minimum,
and voltage: 100 / 240 V that conform to either IEC 60227 or IEC 60245, or to the National Electrical Code (NEC) for the
US, or the Canadian Electrical Code for Canada. The terminals accept cables 0.14 to 2.5 mm
– Ensure the correct fuse is fitted – see Fig. 8 for fuse details.
– Replacement of the internal battery must be carried out by an approved technician only.
– The CMF310 controller (or CMF160 indicator) conforms to Insulation Class I of IEC 61010.
– All connections to secondary circuits must have insulation to required local safety standards. After installation, there must
be no access to live parts, for example, terminals. Use screened cable for signal inputs and relay connections.
Route signal leads and power cables separately, preferably in an earthed (grounded) flexible metal conduit.
– All equipment connected to the CMF310 controller (or CMF160 indicator) terminals must comply with local safety
standards (IEC 60950, EN61010-1).
USA and Canada Only
– The supplied cable glands are provided for the connection of signal input and ethernet communication wiring ONLY.
– The supplied cable glands and use of cable / flexible cord for connection of the mains power source to the mains input and
relay contact output terminals is not permitted in the USA or Canada.
– For connection to mains (the mains input and relay contact outputs), use only suitably rated field wiring insulated copper
conductors rated min. 300 V, 14 AWG, 90 °C. Route wires through suitably rated flexible conduits and fittings.
Accessing the connection board
IMPORTANT (NOTE) Before fitting cable glands, identify
the connections required and cable gland entries to be
used.
Referring to Fig. 7:
1. Using a pozi-drive screwdriver, turn the (captive) electronics
section door retaining screw A
and open the door.
2. Turn the cover plate retaining screw B anti-clockwise until
the cover plate C can be removed.
3. Make connections to connection board terminals – see
Fig. 8, page 8.
WARNING In order to comply with General Safety
Insulation Class 1, the mains earth wire must be
connected to the protective earth terminal block
shown,
to the case stud.
NOT
4. Refit cover plate C and secure it by turning retaining screw
B clockwise until finger-tight. Close the door to the
electronics section and turn door retaining screw A
clockwise to secure.
CI/CMF160/310–EN Rev. C
1
/
turn counter-clockwise
4
as
1
/
turn
4
Fig. 7 Accessing the connection board and making electrical connections
2
(26 to 14 AWG).
SK5
I/O MODULE 3
7
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