Document: 1784en02.doc
QWTIME III MASTER CLOCK
Author: PM
Date: 2008-11-07
User Manual
Page: 10 of 61
WESTERSTRAND URFABRIK AB
P.O. Box 133
Tel. +46 506 48000
Internet:: http://www.westerstrand.se
SE-545 23 TÖREBODA
Fax. +46 506 48051
E-mail:
Serial port RS232/RS485
General
The Master Clock has a serial port for connection to a PC or other similar equipment. The serial port is factory
set to RS232. If RS485 connection is used the Master Clock has to be reconfigured according to the jumper
instruction below.
Please see section
SPECIALFUNKTION/SETUP/RS232
for details about protocol, baudrate etc.
Connection via RS232
Example:
Master Clock External equipment DTE (9-polig D-sub)
(25-polig D-sub)
GND (29) -------------------------------------------------------- 5 -------------------- 7
TD (30) -------------------------------------------------------- 2 -------------------- 3
RD (31) -------------------------------------------------------- 3 -------------------- 2
1
7
4 8
6 20
7 4
8 5
Connection via RS485
1. Turn off power.
2. Open the Master Clock by loosening the four screws holding the front panel. Lift the panel and set the
jumpers B7-B9 according to the instruction below.
3. Remount the front panel and turn on the power again.
5. Connect the RS485 signal to screw terminal 29, 30 and 31.
B9
B8
B7
X
X
X
PREPARED FOR RS232
PREPARED FOR RS485
FACTORY DEFAULT
