Regulus uREG, User Manual

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uREG User Manual
38
RECOMMENDATION
In order to maintain uniform equipment for different substations, it is always recommended
to use a PS module relay (associated with terminals 2, 3 and 4) to signal the Alarm state. This
relay can be used with both topologies applied to the AL circuit: serial and parallel.
For the serial topology, AL signaling is activated by opening the normally closed circuit.
Thus, terminals #3 and #4 of the module must be connected to the series circuit. Terminal #3
should be connected up on the side of positive potential of the voltage source (uAwUp).
For the parallel topology, signaling is prompted by shorting the normally open circuit. This
task is performed by a pair of contacts connected with terminals #2 and #3, wherein terminal
#3 must be connected to the circuitous busbar to the positive potential (uAwUp; there
is a silicon diode to polarize the circuit by a cathode along the route of terminals #2 and #3).
Once the negative potential (relative to the potential of terminal #3) is applied, terminal #1
provides effective exclusion of faulty or non-supplied
uREG
from the signaling circuit and
restoration of Alarm bus readiness.
The
SS-0 module is a functional equivalent to the PS-0 module; it has no switching-mode power
unit.
7.12. PS -1 MODULE (SLOTS 3 & 6)
The PS-1 is a 24 V DC switching power unit module dedicated to
u REG
.
Rated supply voltage:
24 V DC
Admissible range of supply voltage changes: 21 ÷ 38 V DC
Power input at 24 V DC <15 W (type 7W)
Undervoltage protective interlock threshold: none
Other parameters → see PS-0.