Vision Systems VScom 200E PCIex Uživatelský manuál stáhnout pdf (Strana 50)

8 Connector Deﬁnitions

The VScom Industrial cards provide various connectors for the signals of the serial ports. Either

DB9 male connectors are directly available on the card, or a common connector for all ports is

mounted on the bracket. This way each model only needs one slot to ﬁt in.

The signal assignment for RS 232 on DB9 male connectors is deﬁned by the term “RS 232” already.

However there is no such standard for RS 422 or RS 485 exists. Even a de-facto standard for

industrial connectors is not available. Some manufacturers selected similar assignments, some

invented their own deﬁnition.

Below is the signal deﬁnition for all connectors used by the VScom Industrial cards. RS 232 signals

are mentioned for completeness. RTS and CTS signals are not given for RS 485 modes, even when

they are available. They are not mentioned because they can not be used anyway, RS 485 usually

connects more than two devices/stations with each other. In Half-Duplex mode (“2-wire”) the

same pair of wires is used to transmit and receive. So these signals change their name to “Data”.

8.1 DB9 male

Usually this type of connector is used by customers. “4w” denotes the Full-Duplex mode, usually

named “4-wire”. Similarly “2w” denotes the Half-Duplex modes.

Pin RS 232 RS 422 RS 485 “4w” RS 485 “2w”

1 DCD Tx− Tx− Data−

2 RxD Tx+ Tx+ Data+

3 TxD Rx+ Rx+

4 DTR Rx− Rx−

5 GND GND GND GND

6 DSR RTS−

7 RTS RTS+

8 CTS CTS+

9 RI CTS−

Table 15: DB9 male Connector

Figure 28: DB9 male Connector

8.2 DB37 female

This common connector is for four serial ports. So each signal name appears four times, it will

have an index like (3) for the third serial port of the card. The serial ports are neither isolated nor

isolated from each other, so GND is common and has no index. Pin 1 is a no-connect pin.

July 2011 VScom Industrial Card User Manual 50

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Vision Systems VScom 200E PCIex Uživatelský manuál Strana 50