Network Controllers Manual 47
RS-485 Driver Ship (SN 75176) Designation
Device Class B (Style 4) Class A (Style 7)
Acp Audio Control Board
(P/N 150048)
U2 N/A
ACP6 U2 N/A
FCCD U19 U20
IRC-1 Optical Isolation
Board (P/N 150055)
U3 U2
REM (P/N 150031) U10 U11
SAN CPU (P/N 150125) U3 U4
Note: Red striped edge of ribbon cable assembly always installed
toward notched (pins 1 and 8) end of IC sockets.
Field Wiring
TB1-1 & 2 DATA IN - 20 mA loop wiring from the previous
device. Observe polarity.
TB2-1 & 2 24 VDC from the power supply.
TB2-3 3 Earth ground.
TB3-1 & 2 DATA OUT - 20mA loop wiring to the next device.
Observe polarity.
Jumper Setup
Specifications
JUMPER
NAME
JUMPER STATE
(BOLD INDICATES
NORMAL CONDITION)
CONDITION
J1
OUT
Not Used
J2
OUT
Not Used
J3 As Required Selects P3 as I/O connector for
use with ACP(6), IRC-1, MST,
REM, SAN-CPU.
J4 As Required Selects P1/P2 as I/O connectors
for use with CM1/2(N) and RMDP-
1N.
Indicators
LD-1 Red LED. Indicates local module transmitting data.
LD-2 Red LED. Indicates local module receiving data.
LD-3 Red LED. Indicates module power. Extinguished indicates
module bypass mode.
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