ABB CL Series Applications Manual page 279

Glossary
Function relay
Impulse relay
Input
Interface
Local expansion
276
Function relays can be used for complex control tasks.
The logic relay features the following function relays:
• Timing relay
• 7-day time switch
• Year time switch
• Counter, up/down, high-speed, frequency
• Analog value comparator/threshold value switch
• Operating hours counter
• Master reset
• Text marker relay
An impulse relay is a relay which changes its switching state
and retains its new state (latched) when a voltage is applied
to the relay coil for a short time.
The inputs are used to connect up external contacts. In the
circuit diagram, inputs are evaluated via contacts I1 to I12
and R1 to R12.
CL-AC1, CL-DC1 and CL-DC2 can receive additional analog
data via the inputs I7, I8 and I11, I 12.
The CL interface is used to exchange and save circuit
diagrams to a memory module or PC.
A memory module stores a circuit diagram and the CL
settings.
The CL-SOFT PC software allows you to control the logic
relay from the PC. For this the PC and the logic relay are
connected via the CL-LAS.TD001 cable.
I/O expansion with the expansion device (e.g.
CL-LET.20DC2) is installed directly on the basic unit. The
connector is always supplied with the expansion unit.
1SVC 440 795 M0100