46023-12-0399 <90-00009>
P
AGE
5
INSTALLATION
1. P
ORT
T
ERMINATION
You can strap the 46023-12 MAC to have its alarm inputs (receive
lines) either terminated or unterminated. The terminating load is
100 ohms. Each alarm port must have a current path at some
point of termination, which is normally set at the MAC.
Thru-Hole Version
♦
If a channel is connected to communications lines, the resistor
is normally strapped IN (position 1-2).
♦
If termination for a channel is provided at the source, strap the
resistor OUT.
Refer to Table A and Fig. 2.
T
ABLE
A - R
ECEIVE
L
INE
T
ERMINATION
(T
HRU
-H
OLE
V
ERSION
)
F
IG
. 2 - S
WITCH
AND
S
TRAP
O
PTION
L
OCATIONS
(T
HRU
-H
OLE
V
ERSION
)
ALARM PORT
NUMBER
1
2
3
4
5
6
7
8
STRAP
NUMBER
X1
X2
X3
X4
X5
X6
X7
X8
1
S 1
2 3 4 5 6 7 8
1
S 2
2 3 4 5 6 7 8
UP IS OFF
UP IS OFF
3 2 1
IN
OUT
X8
X7
X6
X5
X4
X3
X2
X1
NOTE:
Switch S2 is not used.
UPDATED
