P
AGE
32
46131-0598 <90-00018>
The A12-46130-00 Expansion Board subassembly has 32 alarm
inputs and 8 control outputs. Each alarm has a single input that
requires a ground to activate the alarm circuitry. The eight
control outputs can be set with switches for normally open or
normally closed contacts.
The A12-49030-00 202 Modem subassembly operates as a Bell
202 full-duplex tone modem. It has a data rate of 1200 baud.
There are test points to measure the transmit and receive signal
level, a potentiometer to adjust the transmit level, and an LED
to indicate when the carrier signal is present.
Refer to Fig. 1 in the Circuit Description section for a func-
tional schematic of the subassemblies.
U
PGRADE
O
RDERING
I
NFORMATION
♦
To upgrade the -00 option to a -01 option, order the following:
A12-46130-00 Expansion Board subassembly
♦
To upgrade the -00 option to a -20 option, order the following:
A12-49030-00 202 Modem subassembly
♦
To upgrade the -00 option to a -21 option, order the following:
A12-46130-00 Expansion Board subassembly
A12-49030-00 202 Modem subassembly
♦
To upgrade the -01 option to a -21 option, order the following:
A12-49030-00 202 Modem subassembly
♦
To upgrade the -20 option to a -21 option, order the following:
A12-46130-00 Expansion Board subassembly
I
NSTALLATION
To install a subassembly:
1.
Turn off power to the APU.
2.
Open the plastic front cover.
3.
Remove the two screws in the lower left and lower right corners of
the front panel.
4.
Pull the front panel and circuit boards out from the housing.
5.
Disconnect the 10-position connector in the middle of the main
circuit board.
6.
Disconnect the 20-position connector on the left side of the main
circuit board.
7.
Pull the main circuit board out ot the three 56-pin edge connectors
on the front panel.
SUBASSEMBLY INSTALLATION
CONTINUED
. . .
