Measurement Computing Extender488 - Manual (Page 14)

Section 2 Getting Started
2. 4
Extender488 Data Format Selection
DOT
Switch
Side
View
OPEN
1 2 3 4 0
1
8 data Bits
OPEN
1 2 3 4
7 data Bits
Note: Factory default is 8 data bits.
2.2.3 Extender488 Serial Port Cabling
The Extender488 is shipped from the factory for RS-422 transmission medium, which
prescribes differential receivers for high noise immunity. T o insure signal integrity, only use
shielded cable for the serial port connections. If you are not using a cable provided by the factory,
below is the appropriate connections for proper operation.
Signal Pin # Signal Pin #
1
2
5
6
7
Receive Data -
Receive Data +
Ground (shield)
Transmit Data -
Transmit Data +
1
2
6
7
5
Transmit Data +
Transmit Data -
Ground (shield)
Receive Data +
Receive Data -
Local Extender Remote Extender