The logic control signals are operated with 24V DC. There are two control signals (ON and OFF_N) and a common reference (COM). For the control signals, the function is guaranteed from 15V DC (6mA) to 33V DC (20mA).
The contactor is closed by a common signal ON and opened by removal of control signal from OFF_N. The functions are described in the provided diagram.
- “ 1 “ means 24V DC between the control signal and COM.
- “ 0 “ means no voltage between the control signal and COM.
Minimum control signal pulse length for opening and closing is 10ms. To connect the PLC interface, use cable dimension of max 1.5mm².
CA6 Vs. CA9
The CA9-__-EI electronic interface functionality is equipped differently within the CA9 range of contactors.
On the lower range of CA9 contactors between the amps of 116A...370A, there is a selection option to purchase the contactor with or without the integrated "EI" functionality.
CA9-116...370-EI-11-* inclusive with ‘ EI ‘ electronic interface feature
CA9-116...370-11-* without ‘ EI ‘ electronic interface feature
It is important to know that the selection of a CA9-116...370-EI contactor requires the ‘ EI ‘ function to be utilized and the device would be expecting an input from separate logic control signals.
The higher range of CA9 contactors at 400A and larger have the ‘ EI ‘ electronic interface feature integrated into the device as a standard. These contactors at CA9-400-EI and larger have the potential to energize the coil by either one of two ways:
- Control by switching voltage on A1 and A2
- Control with separate logic control signals
Selection of control method is done with switch S1. (see provided illustration)