CHAPTER 3: SYSTEM INFORMATION
SNAP PAC R-Series Controller User’s Guide
31
Connectors and LEDs—Wired+Wireless Models
The following information applies to Wired+Wireless models (SNAP-PAC-R1-W and SNAP-PAC-R2-W). For
details on LED blink codes, see
** Minimum requirements for wiring an RS-232 serial cable to connect to a PC. If you want to connect the controller to a
modem, see
for all eight pin connections.
LEDs*
Indicator
Description
ACT
Ethernet network activity
LNK
Link established with Ethernet network
STAT
Startup status, control program operational
status, MicroSD card access
232
RS-232 serial activity
WLAN
Wireless LAN status
* The WLAN LED replaces the PPP LED on -W models.
These models can still communicate using PPP even
though they do not have the indicator.
RS-232 Port (Port 0)
Pin
Description
1
TX
2
RX
3
COM
4
RTS
5
CTS
6
COM
7
DTR
8
DCD
Independent 10/100 Mbps
Ethernet interfaces
(RJ-45 connectors)
RS-232 serial
communications
Status and
activity LEDs
Controller reset
button
Ethernet LEDs
MicroSD card
slot
Wireless LAN antenna
PC
Controller
DB9
RX
TX
SIGNAL
2
3
5
1
2
3
TX
RX
COM
COM
RS-232 Serial Cable Wiring**
6
GROUND
