ALTERNATIVE CONNECTIONS REFERENCE
MAIN INTERFACE
The main serial interface is compatible with the following electrical standards:
RS232
RS485 full-duplex
RS485 half-duplex
CAUTION
Do not connect GND and GND_ISO to different (external) ground
references. GND and GND_ISO are internally connected through filtering
circuitry which can be permanently damaged if subjected to voltage drops
over 0.8 Vdc.
Details regarding the connections and use of the main interface selection are given in the
next paragraphs.
9-pin D-sub Female Connector Pinout
Pin RS232
RS485
Full Duplex
2 TX TX485 +
3 RX RX485 +
5 GND_ISO GND_ISO
7 CTS RX485 -
8 RTS TX485 -
5
1
9
6
9-pin D-sub Female Connector
RS232 Interface
The main serial interface is used for communication with the Host computer through the
PWO and allows both transmission of code data and controller configuration.
The following pins of the 9-pin connector are used for RS232 interface connection:
Pin Name Function
2 TX Transmit
3 RX Receive
5 GND_ISO Main signal ground
7 CTS Clear to send
8 RTS Request to send
The RTS and CTS signals control data transmission and synchronize the connected devices.
If the RTS/CTS hardware protocol is enabled, the SC6000 activates the RTS output to
indicate a message can be transmitted. The Host must activate the CTS input to enable the
transmission.
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