West-control-solutions MRC 7000 Controller Manual Manuale Utente Pagina 64

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64
If the relay is connected to a
high impedance AC device,
the snubber network used to
protect the relay contact may
cause the output to appear
to be activated when the
relay is off. To cure the
problem, cut the snubber
resistor for the output that is
being affected.
Resistor Relay
R1, R2 Relay A
R3, R4 Relay B
R5 Relay C
R6 Relay D
FIGURE A-3 - SPDT RELAY/SSR DRIVER OUTPUT BOARD
TB6 TB7 TB8
TS1
R1 TS2 R2 TS3 R3
TS4
R4 TS5
R5
TS6
R6
C1 C2
C3 C4 C5 C6
K1 K2
K3
K4
P7
TB9
(rlyA) (rlyB)
(rlyC) (rlyD)
(rlyG)
(rlyH)
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