Campbell Scientific COM320 Voice Communications Modem - Manual (Page 26)

COM320 Voice Communications Modem
SE 1 2 3 4 5 6 7 8
H
1 2 3 4
L
DIFF
H EX1 H L H L L P2 P1
12V G
DC ONLY CAUTION
LUG GROUND
POWER IN
WIRING PANEL
CR1000
PERIPHERAL PORT
RS-232 (Not Isolated)
SN:
CS I/O
MADE IN USA
11 10 9 SE 15 16 13 14 12
H L
DIFF
H EX2 H L H L L EX3
5 6 7 8
SW
-12
5V 12V 12V C5 C4 G G G G C1 C2 C3 G G C6 C7 C8
Tx
COM1
Rx Tx Rx Tx Rx Tx Rx
COM2 COM3 COM4 POWER OUT
SDM
G 12V
SC12 Cable
Earth
Ground
Telephone Wall
Jack
Earth Ground
FIGURE 2. COM320 Hardware Connection Using Standard RJ11
Phone Jack
20