Serial Port Pin Connectors - Omega Engineering OMB-NETSCAN 1500 User Manual

Micro-
switch #
1
2,3
4,5
6,7,8
9
Note 1: At 9600 and 19200 baud rates, Handshake should be set for "Hardware Handshake
only," 10.
Note 2: ChartView software will not run when Handshake is set for "Software Handshake
only," 01.

Serial Port Pin Connectors

NetScan is equipped with two DB9 connectors, both located on the rear panel. The DB9
connector labeled CONFIG is for ethernet configuration only. The DB9 connector labeled
RS-232/422 is for serial interface applications. The serial port default is for the RS-232
connector configured as DTE (Data Terminal Equipment) for an IBM AT at RS-232 levels.
An optional CA-47 cable (or equivalent) connects the NetScan with the computer. The NetScan side of the cable has
a male DB9 connector for use with the RS-232/422 serial port. The cable's computer side has 2 connectors: one for
DB9, and the other for DB25. Other crossover-type cables can be used if wired as shown in the figure. The
following table lists the RS-232 and RS-422 pin connections for a DB9.
C o m p uter
D B2 5
2 3 4 5 7
7-8
Configuration Settings on Rear Panel DIP Switch
Label
COMM SELECT
1
HANDSHAKE (H/S)
PARITY
SERIAL BAUD RATE
RS-232
RS-422
N etS ca n C o m p uter
D B2 5 D B9
D B9
TX D 2 2 R XD
2 3 5
R XD 3 3 TX D
C TS 5 5 G N D
G N D 7 7 R T S
7 8
RT S 4
8 C T S
Interface W iring Diagram
Setting Description
0 Selects serial communication
1 Not applicable to NetScan
00 No Handshake
01
Software Handshake only
(XON/XOFF)
10 Hardware Handshake only
(RTS/CTS)
11 Both Hardware/ Software
Handshake
00 No Parity
01 Odd Parity
10 Even Parity
11 (N/A)
000 300 baud
001 600 baud
010 1200 baud
011 2400 baud
100 4800 baud
1
101 9600 baud
110 19200 baud
111 (N/A)
0 Selects RS-232 Serial
1 Selects RS-422 Serial
Pin #
N etScan
1
D B9 D B9
2
R XD 2 2 R XD
TX D 3 3 TX D
3
G N D 5 5 G N D
4
RT S 7
7 R T S
5
C TS 8 8 C T S
6
7
8
9
2
1
RS-232
Pin Description
No connection
Receive Data (RxD-)
Transmit Data (TxD-)
No connection
Ground
No connection
Request to send (RTS-)
Clear to send (CTS-)
No connection
NetScan User's Manual
Signal
N/A
Input
Output
N/A
Ground
N/A
Output
Input
N/A