
Quick Start Guide ePowerSwitch 8 M/S (M8 / S8) V.11/2006 Page
21
7. Serial port pin assignment
ePowerSwitch master
Connector:
9-pin Sub-D female connector
Pin
assignment
Connection
settings
Pin 2: TxD (transmit data to the PC)
Bits per second:
9600
Pin 3: RxD (receive commands)
Data bits:
8
Pin 5: GnD (ground)
Parity:
None
Stop bits:
1
Flow control:
None
Notes:
−
The serial cable supplied with the ePowerSwitch M8 is a standard straight extension cable
with DB9 connectors. This cable is intended for connecting the serial port of the
ePowerSwitch M8 to a serial port of a PC.
−
You can use any other straight serial cable, but for EMC reasons, we advise you not to use
cables longer than 2.9 metres.
ePowerSwitch slave
Connector:
RJ9 female
Pin
assignment
Connection
settings
1
(yellow):
Ground Bits
per
second:
9600
2 (white):
RxD (receive commands)
Data bits:
8
3
(blue):
TxD
(transmit
data)
Parity:
None
4
(orange):
Ground Stop
bits:
1
Flow
control:
None
A short connection cable is delivered with each ePowerSwitch S8 slave to connect its RJ9 input
connector to the RJ9 output connector of an ePowerSwitch M8 master or another
ePowerSwitch S8.
Note:
The total length of all serial cables must not exceed 2.9 metres.
If you want to connect the ePowerSwitch S8 directly to the serial port of a PC, assemble a serial
cable as shown in the drawing below or contact your dealer to order one.