46022-20-0398 <90-00066>
P
AGE
3
F
IG
. 1 -F
UNCTIONAL
S
CHEMATIC
, 46022-20 M
ULTIPLE
A
LARM
C
OMBINER
- BATT
45 +5 VDC
47 +12 VDC
49 -12 VDC
CTS
DCD
DSR
TXD
DTR
RTS
39
43
40
37
41
38
42
D3
D4
D2
D1
53
RXD
CA
54
18
55
56
36
DATA
XMT
DATA
RCV
CF
35
17
GND
-
+
-
+
SUBASS'Y
OUT
IN
OUT
IN
OUT
IN
OUT
IN
MODULE
SUASS'Y
POWER
SUPPLY
CIRCUIT DESCRIPTION
INSTALLATION
B
efore mounting the module in the equipment housing, note
the following information about strapping and subassem-
blies:
S
TRAPPING
The 46022-20 MAC has strapping points to place the signal
isolation diodes IN or OUT of the circuit (refer to Figs. 1 and 2).
They are normally strapped IN.
If you need to replace a module in the field, strap the replace-
ment unit to match the one you’re replacing or contact Dantel’s
Customer Support Services Department. Set all subassembly
straps or switches in accordance with the practice for that
subassembly.
M
OUNTING
A
S
UBASSEMBLY
1. To install a subassembly, follow these steps:
♦
If there is a hole plug in the front panel of the module, re-
move the plug.
♦
Remove the three screws from the subassembly standoffs
and remove any existing subassembly (see Fig. 2).
♦
Place the subassembly on the board.
• Insert P4 into J4 and P5 into J5.
CONTINUED
. . .
