User manual

76 Relay Multiplexer Command Reference Chapter 3
When closing a channel in three-wire mode, only the lower bank (0-3) is
specified and the upper bank pair (4-7) will automatically close. A
maximum of 32 three-wire channels can be switched. Selecting an upper
bank (4-7) channel causes an error.
NOTE In three-wire mode, do not connect user wiring to the HI terminal in the
upper bank pair (4-7). This terminal is switched during three-wire operation,
and dependent on relay configurations, could be switched to

the HI COM terminal.
Four-Wire Mode (WIRE4): Banks are paired 0/4, 1/5, 2/6, and 3/7.
Switches both the HI and LO terminal of a channel in bank 0-3, to that
bank’s HI COM and LO COM terminals. Also switches the HI and LO
terminal of the channel in pair bank 4-7, to that bank’s HI and LO COM
terminals. When closing a channel in four-wire mode, only the lower bank
(0-3) is specified, and the upper bank pair (4-7) will automatically close.
A maximum of 32 four-wire channels can be switched. Selecting an
upper bank (4-7) channel causes an error.
Related Commands: [ROUTe:]OPEN, [ROUTe:]CLOSe, [ROUTe:]SCAN
*RST: *RST does not change the selected mode.
Example Configuring Multiplexer Mode
This example configures card 01 of a single-module switchbox to
four-wire mode.
FUNC 1,WIRE4
!Configures card #1 to four-wire mode
[ROUTe:]FUNCtion?
[ROUTe:]FUNCtion? <card_number> returns the current operating mode
of the card(s) queried. See [ROUTe:]FUNCtion for card_number
definition. The command returns "WIRE1" if in the one-wire mode,
"WIRE2" if in the two-wire mode, "WIRE3" if in the three-wire mode, or
"WIRE4" if in the four-wire mode.
Example Query Operating Mode
This example sets card #1 in a single-module switchbox to one-wire
mode and queries the operating state. Since the one-wire mode is
selected, "WIRE1" is returned.
FUNC 1,WIRE1
!Configure card #1 to one-wire mode
FUNC? 1
!Query mode of card #1