General
Type of electric connection	Screw connection
Nominal current	8
Rated control supply voltage Us at AC 50HZ	24
Rated control supply voltage Us at AC 60HZ	24
Rated control supply voltage Us at DC	24
Voltage type for actuating	AC/DC
Drive, polarization	Polarized
Drive, switching attitude	Mono stable
Number of contacts as normally closed contact	0
Number of contacts as normally open contact	0
Number of contacts as change-over contact	2
Type of switch contact	Simple contact
Degree of protection (IP)	IP20
Width	12
Height	67.5
Depth	70
Material of contact surface	Other
Voltage type (operating voltage)	AC/DC
With detachable clamps
With forced-guided contacts
Complete with socket
With LED indication

Programmable logic controllers (PLCs) play a central role in today's industrial automation systems. They connect measuring instruments and actuators connected via conventional cabling to the process. However, a PLC is not completely decoupled from the industrial environment, so overvoltage peaks and transient currents can certainly affect its functionality. In order to adjust the applied voltage and/or current and to provide the PLC with suitable galvanic isolation, the appropriate interface should be installed for each input/output point, which both regulates the voltage and current level and offers isolation protection. The relay and optocoupler series from ABB offer such interfaces. They allow a wide range of adjustment of the voltage (from 5 to 250 V) and current (from 0.01 to 8 A) as well as a high level of isolation between input and output of 2 to 4 kV. Transistor, MOS-FET or triac outputs can be selected for high switching frequencies with low switching loads.