12
System Wiring Connections
Power Supplies & Relay Card
The AC power cord from the MC512B power supply is plugged into the AC surge protector power strip on the cabi-
net. The power cord from the MC2626B power supply is also plugged into the same power strip.
(See Figure 9).
Power supply output wiring is grouped into cables, each ending with a keyed connector. Two of the cables from the
MC512A are connected to P3 and P2 on the card frame back plane. The cable from the MC2626B is connected to
J6 on the MCAPI2 and from the MCAPI2 to P1 back plane.
The MCRC relay card is used only in the cabinet-mounted version of the Multicom 2000 System. The card contains
24 (each) program and intercom relays and 24 sets of terminals (4 pins per set) for connection with station wiring.
Station numbers are assigned to the MCRC relay card in ascending order, from left to right.
Each station/analog card pair connects to a corresponding relay card via the card frame back plane “J” connectors,
using two ribbon cables (MCCA ribbon cable assembly). The 36" long cable connects to the analog card “J”
connector (on the back plane) to connector J26 on the relay card. The 30" long cable connects to the station card
“J” connector (on back plane) to connector J25 on the relay card.
Figure 9 - System Wiring
Station
1
Numbers increase
from left to right
NOTE 1:
The cable connector must be
positioned as shown in this detail. It does
not cover all pins – eight pins towards the
center of the back plane are left exposed.
The back plane screening indicates the
correct position of the connector. The flat
cable’s striped (red) conductor must be
on the side with the exposed pins.
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