Rockwell Automation 161 SERIES A - Manual (Page 14)

Bulletin 161
8
4.2 Connection and description of the control terminals
When using the transistor outputs 11, 12 - CM2 install a recovery diode parallel to the relay used. Otherwise
the switching relay could damage the output. Do not short-circuit the terminals H and L or P24 and L.
The control wires must be installed separately from the power lines and motor lines. They may not exceed 20
m in length. To improve noise immunity, the control wires should be screened (refer to Appendix A).
If unavoidable, transpositions between the power lines or motor lines and the control wires should be installed
at right angles.
Example of a connection
•
Wait at least 2s after turning on the power supply before issuing a start command and do not switch
off the mains supply during operation of the device.
•
Each signal must be applied to the digital inputs 1 …5 for at least 12 ms.
•
If input 5 is programmed as a PTC resistor (parameter C05 ), terminal L will be the corresponding
reference potential.
pot 1 - 2 k
Ω
frequency reference
fault indication relay
230 VAC