ABB ControlMaster CM10 Manual page 16

ControlMaster CM10, CM15, CM30, CM50, CMF160 and CMF310
Universal process controllers and indicator,
Warning.

ControlMaster controllers and indicator are not fitted with a switch therefore a disconnecting device such as a switch or circuit breaker
conforming to local safety standards must be fitted to the final installation.

It must be mounted in close proximity to the ControlMaster within easy reach of the operator and must be marked clearly as the
disconnection device for the instrument.

Remove all power from supply, relay and any powered control circuits and high common mode voltages before accessing or making any
connections.

Use cable appropriate for the load currents. The terminals accept cables from 18 to 14 AWG (0.8 to 2.5mm

Always route signal leads and power cables separately, preferably in earthed (grounded) metal conduit.

It is strongly recommended that screened cable is used for signal inputs and relay connections.

ControlMaster CM10, CM30 and CM50 controllers and CM15 indicator conform to Mains Power Input Overvoltage Category 2, Pollution
Degree 2 (EN601010–1) and are protected through double insulation – Class II.

ControlMaster CMF160 and CMF310 conform to Overvoltage Class III on mains, Class II on inputs and outputs and Pollution degree 2,
Insulation class 1.

Analog / digital inputs and outputs, transmitter power supply and DC power supply are SELV (Safety Extra Low Voltage) circuits.

All connections to secondary circuits must have basic insulation.

After installation, there must be no access to live parts, e.g. terminals.

Terminals for external circuits are for use only with equipment with no accessible live parts.

If a ControlMaster is used in a manner not specified by the Company, the protection provided by the equipment may be impaired.

All equipment connected to the instrument's terminals must comply with local safety standards (IEC 60950, EN601010–1).
Note. Terminal screws must be tightened to a torque of 0.1 Nm (0.9 lbf/in.).
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5 MODBUS Communications
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IM/CM/C–EN Rev. H