
ALTERNATIVE CONNECTIONS REFERENCE
MAIN INTERFACE
A
The main serial interface is compatible with the following electrical standards:
RS232
RS485 full-duplex
RS485 half-duplex
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
CAUTION over 0.8 Vdc.
Details regarding the connections and use of the main interface selection are given in the next paragraphs.
Pin | RS232 | RS485 |
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| |
Full Duplex | 5 | 1 | |||
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| ||||
2 | TX | TX485 + |
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| |
3 | RX | RX485 + | 9 | 6 | |
5 | GND_ISO | GND_ISO | |||
7 | CTS | RX485 - | |||
8 | RTS | TX485 - |
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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
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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