User manual

42 Using the Relay Multiplexer Chapter 2
To connect the HI and LO terminals of bank 0 channel 0 and the HI and LO
terminals of bank 4 channel 0 to their COM terminals, execute:
FUNC 1,WIRE4
!Configures the multiplexer (card #1) for
four-wire operation.
CLOS (@100)
!Connects the HI and LO terminals of bank

4 channel 0 to the bank 4 COM terminals
NOTE If the Status Register switch is set to four-wire operating mode, the FUNC
1,WIRE4 command is not required. In four-wire mode, banks are paired
0/4, 1/5, 2/6, and 3/7. Upper bank pair (4-7) channels cannot be switched
or queried while in this mode.
Figure 2-4. Example:Four-Wire Mode Channel Switching
H
L
COM
BANK 0
SWITCH CARD TERMINAL MODULE
L
H
1 IN
2 IN
1 OUT
2 OUT
4 IN
4 OUT
BANK 4
COM
3 IN
3 OUT
CH0
CH0
H
L
L
H