ABB CM30 - Electrical Connections

ControlMaster CM30 and CM50
Universal process controllers,
1
/4 and
1
/2 DIN 4 Installation
IM/CM/ED–EN Rev. B 11
4.5 Electrical Connections
Warning.
 The controller is 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.
 The switch must be mounted in close proximity to the controller within easy reach of the operator
and must be marked clearly as the disconnection device for the controller.
 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
2
).
 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.
 The instrument conforms to Mains Power Input Overvoltage Category 2, Pollution Degree 2
(EN601010–1). (This equipment is protected through double insulation – Class II.)
 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, for example terminals.
 Terminals for external circuits are for use with equipment with no accessible live parts only.
 If the controller is used in a manner not specified by the Company, the protection provided by the
equipment may be impaired.
 All equipment connected to the controller'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.).