Specifications

Installation and startup procedure
38
3.2 Device installation
RS2-4R
Release 1.0 03/04
3.2.2 6-pin terminal block
The supply voltage and the signal contact are connected via a 6-pin terminal
block with
Rast locking.
Warning!
The RS2-4R devices are designed for operation with safety extra-low
voltage. Thus, they may only be connected to the supply voltage connections
and to the signal contact with PELV circuits or alternatively SELV circuits with
the voltage restrictions in accordance with IEC/EN 60950.
U Supply voltage
The supply voltage can be connected redundantly. Both inputs are
uncoupled. There is no distributed load. With redundant supply, the
transformer supplies the
RS2-4R alone with the higher output voltage.
The supply voltage is electrically isolated from the housing.
U Signal contact:
The signal contact monitors proper functioning of the RS2-4R, thus
enabling remote diagnostics.
A break in contact is reported via the potential-free signal contact (relay
contact, closed circuit):
D The failure of at least one of the two supply voltages (supply voltage 1
or 2 < 18 V).
D A continuous malfunction in the RS2-4R (internal 3.3 VDC voltage).
D The defective link status of at least one port. With the RS2-4R, the
indication of link status can be masked by the management for each
port. Link status is not monitored in the delivery condition.
D The loss of Redundancy guarantee.
D Error during self-test.
The following conditions are reported in RM mode:
D Ring monitoring is not possible, e.g. during software initialization.