Campbell Scientific PS12LA, PS512M, CH12R, CH512R Power Supplies/Regulators - Manual (Page 8)

PS12LA, PS512M, CH12R, CH512R Power Supplies and Charging Regulators
4
1 1
2
7
3
8
4
9
5
+5 V
GND
HS
Ring
+12 V
RX
TX
ME
Ring
RX
TX
ME
2
3
4
5
6
7
8
9
+12 V +5 V
1.85 A
Thermal
Fuse
FIGURE 3. Null Modem Connections