Page 4 of 39 Rev. 13
1.2 RS-232 CONNECTION
The RS-232 standard allows only a single point-to-point connection. The cable needed for the RS-232 communication is
a standard one with DB9 male and female connectors. The DB9 male is connected at the PCOM side and the DB9
female is connected at the customer DTE. The cable can be 15.2m (50 ft) long maximum. To connect to the RS232 via
(DB9), the switch SW7 must be set to (off/off/off) as shown below.
232RS
7S
DTE
232RS
PCOM
TXD
RXD
TXD
RXD
)(GSgroundSignal
RTS
CTS
RTS
CTS
1ground
2ground
connec tioncableRSFigure 232:2
PCOM_TXD
PCOM_RXD
Ground 2
J14
DB9 Female connector
5
9
4
8
3
7
2
6
1
1.3 RS-485 CONNECTION
To connect to the RS485 port, the switch SW7, must be set to (on/on/on) as shown below
on
1
485
S
7SW
Figure 3, provides the wiring connection to the RS485.
GS
)(BTD )(ATD
)(BRD
)(ARD
1
2
3
4
5
485RS
15JHEADER
5: GS
4: TD (B)
3: TD (A)
2: RD (B)
1: RD (A)
Figure3: Connector RS485
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