One Channel Connection; Two Channels Connection With Equivalent Contacts - ABB Sentry SSR32 Product Manual

Safety relays

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7.2

One channel connection

The safety device contact must be closed before the safety relay can be set in active mode.

Opening of the safety device contact inactivates the safe outputs.

One channel connection, +24 VDC static signal

One channel connection from T1

7.3

Both contacts must be closed before the safety relay can be set in active mode. Opening one

or both contacts inactivate the safe outputs. Both contacts must be opened and closed before

the outputs can be activated. A short-circuit between the safety inputs is not monitored by the

safety relay if T connections are not used. In this case category 4 can only be achieved if a

safety device with short-circuit monitored outputs is connected.

Two channels connection with equivalent contacts, +24 VDC static signal

2TLC010067M0201 Rev.G

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