User's Manual
Arctic Communication Gateway
Firmware Version 3.1.5
12
Document Version 1.0
Figure 4. DB9 male connector
The serial port 1 (RS1) is a full RS-232 port. The pin description of this port is
as follows:
Table 2: RS-232 Port PIN Description
Pin Number Name
Direction Explanation
1
DCD
IN
Data Carrier Detect
2
RXD
IN
Received Data
3
TXD
OUT
Transmitted Data
4
DTR
OUT
Data Terminal Ready. Handshake output
5
GND
-
Signal ground.
6
DSR
IN
Data Set Ready. Handshake input
7
RTS
OUT
Ready To Send. Handshake output
8
CTS
IN
Clear To Send. Handshake input
9
RI
IN
Ring Indicator
The serial port 2 (RS2) can be configured either as a half RS-232 or an
RS-422/485 (DTE Master). The Pin description is same as in RS1, when in
RS-232 mode. The pin description of this port is as follows in RS-485 mode.
Table 3: RS-485 Port PIN Description
Pin Number
RS-485,Full duplex (4-wire)
RS-485 Half duplex (2-wire)
1
NC
NC
2
RXD+ (in)
NC
3
TXD–(out)
TXD/RXD- (out/in)
4
NC
NC
5
GND
GND
6
NC
NC
7
TXD+ (out)
TXD/RXD+ (out/in)
8
RXD–(in)
NC
9
NC
NC
Note!
Make sure that you DO NOT connect RS-422 or RS-485 devices to a port
which has been configured to operate as an RS-232 port.
Ethernet Connector
Arctic has an RJ45 connector for 10/100 Mbps Ethernet connection. Maximum
length of the Ethernet cable is 100m.
