CHAPTER 2: QUICK START
SNAP PAC S-Series User’s Guide
23
23
Wiring SNAP-PAC-S2 Controllers to a SNAP PAC SB-Series Brain
Also see
“SNAP-PAC-S2 Connectors, Indicators, and Pinouts” on page 55
and
“SNAP-PAC-S2-W
Connectors and Indicators (Wired+Wireless)” on page 56
.
Two-wire
Pin 1
2-wire termination, end of link
Switches 3 & 2 OFF
Switch 1 ON
1 2
3
ON
1 2
3
ON
2-wire, middle of link.
All switches OFF
Earth GND
TX/RX +
TX/RX –
COM
TX/RX +
TX/RX –
COM
TX/RX +
TX/RX –
COM
Four-wire
TX/RX +
TX/RX -
COM
RX -
RX +
TX/RX +
TX/RX -
COM
RX -
RX +
4-wire termination, end of link
Switch 3 OFF
Switches 2 & 1 ON
1 2
3
ON
1 2
3
ON
4-wire, middle of link
All switches OFF
RX +
RX –
COM
TX/RX –
TX/RX +
Earth GND
4
5
3
1
2
NOTE: The connector pins
on an actual SNAP-PAC-S2
are in a different order than
shown here.
