Reer MZERO - Electrical Connections; Instructions Concerning Connection Cables

STAND ALONE PROGRAMMABLE SAFETY CONTROLLER
10 8541403 • 19/07/2021 • Rev.1
English
Electrical connections
Figure 2
The MZERO controller is provided with
terminal blocks for the electrical
connections.
The unit provides 40 terminals.
➔ Terminal tightening torque: 5...7lb-in
(0,6...0,7 Nm).
 Install the safety controller in an enclosure with a protection class of at least IP54.
 Connect the module when it is not powered.
 The supply voltage to the units must be 24Vdc 20% (PELV, in compliance with the
standard EN 60204-1 (Chapter 6.4)).
 Do not use the MZERO to supply external devices.
 The same ground connection (0VDC) must be used for all system components.
Instructions concerning connection cables.
➔ Wire size range: AWG 12...30, (solid/stranded) (UL).
➔ Use 60/75°C copper (Cu) conductor only.
➔ We recommend the use of separate power supplies for the safety controller and for other
electrical power equipment (electric motors, inverters, frequency converters) or other
sources of disturbance.
➔ Cables used for connections longer than 50m must have a cross-section of at least 1mm
2
(AWG16).