Chapter 2 | SMART I/O User’s Manual | |||
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2.5.5 RS232 Telephone Connector (BU1)
In order to meet the needs of widespread standards, the RS232 connector is selected as a telephone connector, an
Pin Nr. | Signal | Description |
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| 8 |
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1 | DSR | Data Set Ready |
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2 | RTS | Ready to Send |
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3 | System GND | System GND |
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4 | TxD | Transmit Line |
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5 | RxD | Receive Line |
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6 | DCD | Data Carrier Detect |
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7 | CTS | Clear to Send |
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8 | DTR | Data Terminal Ready |
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2.5.6 RS485
Pin Nr. | Signal | Description | Pin Nr. | Signal | Description |
1 | SHIELD | Shield Isolation | 6 | Aux. +5V | Auxiliary +5V |
2 | N/C | Not Connected | 7 | N/C | Not Connected |
3 | T/RxD + | Transmit / Receive Line | 8 | T/RxD - | Transmit / Receive Line |
4 | CNTR +* | Control Line | 9 | CNTR | Control Line |
5Aux. GND Auxiliary Ground
*optional, for
9
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March 12, 1996 | ©1996 PEP Modular Computers GmbH | Page 2 - 15 | |
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