West Control Solutions MRC 7000 Recorder Manual - Manual (Page 52)

52
FIGURE A-3 - SPDT RELAY/SSR DRIVER OUTPUT BOARD
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
TB6 TB7 TB8
TS1 R1 TS2 R2 TS3 R3 TS4 R4 TS5 R5 TS6 R6
C1 C2 C3 C4 C5 C6
K1 K2 K4 K3
P7
TB9
(rly A)
(rly C)
(rly B)
(rly D)
(rly G) (rly H)