DX6400
2
RS485 Half-Duplex Interface
The RS485 half-duplex interface can be used for multidrop connections with a Datalogic
multiplexer or it can also be used for a master/slave layout. The overall maximum cable
length should not exceed 1200 m (3937 ft).
The following pins of the 25-pin and 26-pin connector are used for RS485 half-duplex
interface connection:
Pin Name Function
2 RTX485 + RS485 input/output (+)
4 RTX485 - RS485 input/output (-)
7 GND_ISO Main signal ground
DX6400
7 GND_ISO
RTX485+
2
RTX485-
4
RS485REF
MULTIPLEXER
RTX485-
RTX485+
1
Earth
Ground
CHASSIS
Figure 14 – RS485 Half-Duplex Interface Connections
Auxiliary Interface
The auxiliary serial interface is equipped with RS232 full-duplex interface connections. The
interface type is exclusive and is selectable through the Genius™ configuration program. The
overall maximum cable length should not exceed 15 m (50 ft).
The following pins of the 25-pin and 26-pin connector are used for RS232 full-duplex
interface connection:
Pin Name Function
20 RXAUX Receive data
21 TXAUX Transmit data
23 SGND AUX Auxiliary signal ground
DX6400 USER INTERFACE
23 GNDAUX GND
TXD
RXAUX
20
RXD
TXAUX
21
1
Earth
Ground
CHASSIS
Figure 15 - RS232 Auxiliary Interface Connections
14