Accessories
9.3 Auxiliary switch blocks
SIRIUS - SIRIUS 3RT Contactors/Contactor assemblies
264 Manual, 09/2017, A5E03656507120A/RS-AE/006
Selection guide for mountable auxiliary switch blocks for power contactors and
contactor relays
Terminal designations and identification numbers for auxiliary contacts
Terminal designations
The terminal designations are 2-digit, e.g. 13, 14, 21, 22:
● Tens digit: Sequence number
– Related terminals have the same sequence number
● Units digit: Function number
– 1 to 2 for NC contact
– 3 to 4 for NO contacts
The identification number indicates the number and type of the auxiliary contacts, e.g. 40,
31, 22, 13:
● First digit: Number of NO contacts
● Second digit: Number of NC contacts
● 31 = 3 NO contacts + 1 NC contact
● 40 = 4 NO contacts
Selection guide for mountable auxiliary switch blocks for power contactors and contactor relays
The 3RH29 auxiliary switch blocks for mounting on the front and laterally can be used for
both the power contactors and the contactor relays.
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