Precautions For Use - Vexta EMP400 Series Operating Manual

2 Safety precautions
2.2

Precautions for use

This section covers limitations and requirements the user should consider when using the controller
EMP400 series and the data setter OP300.
Power capacity
For the controller, use a DC power supply capable of supplying 24VDC ±5% at 0.45A or greater, with
reinforced insulation provided on the primary and secondary sides.
Connecting the OP300 operational unit
Be sure to use the cable supplied with the OP300 operational unit when connecting it to the controller.
The cable comes with two ferrite cores intended for noise prevention. Do not remove these ferrite
cores, since doing so may diminish noise resistance and possibly cause a malfunction.
Preventing electrical noise
Take the following anti-noise measures to prevent malfunction of the controller, driver, and motor
due to external noise:
Wiring the motor
Use an extension cable (sold separately) for connection between the driver and motor.
Wiring the I/O cable
For I/O cables, use a shielded cables with connectors (sold separately).
Minimize the length of the I/O cable.
Wire the I/O cables by maintaining a minimum distance of 300mm (11.8in.) from the inductive loads
of electromagnetic relays, etc., as well as the power lines (the power source and motor, etc.) Do not
wire the I/O cables in the same duct or pipe in which power lines are wired.
Connecting mains filter for power source line
Connect a mains filter to the AC power source input part of the driver in order to prevent externally
generated noise from being transmitted to the driver via the power-source line.
Ground the noise filter's contact terminal using a cable of AWG16 (1.25mm
The use of a cable smaller than AWG16 may cause heat generation.
2-4
2 ) or more in diameter.