B&B Electronics 3PXCC1A Communication Jumper Settings, RS-232 Mode, RS-422 Mode, RS-485 Mode

Chapter 5: Communication Jumper Settings

This chapter will cover all of the jumper settings to set your B&B Serial Card for the proper communications that you desire.

CAUTION: Electrostatic Sensitive Device.

Use ESD precautions for safe handling.

RS-232 Mode

To configure a port for RS-232 mode, 5 jumpers must be checked. The following settings will configure Port 1 as RS-232.

1.JP1A - must be set in the "232" (left) position.

2.JP1F - all four jumpers must be set in the "232" (left) position.

Jumpers JP1B - JP1E have no meaning in RS-232 mode and may be in either position. Figure 2 shows the jumper configuration to set both ports for RS-232 mode.

Figure 2. RS-232 Mode Jumper Settings

Documentation No.3PXCC1x-2x-3903 35

RS-422 Mode

To configure a port for RS-422 mode, 7 jumpers must be checked. The following settings configure Port 1 as RS-422.

1.JP1A, JP1B, JP1C - must be set in the "422" (right) position.

2.JP1F - all four jumpers must be in the "422" (right) position.

Figure 3 shows the jumper configuration to set both ports for RS-422 mode.

Figure 3. RS-422 Mode Jumper Settings

Note that the EIA RS-422 Specification labels data lines with an "A" and "B" designator. Some RS-422 equipment uses a "+" and "-" designator. In almost all cases, the "A" line is the equivalent of the "-" line and the "B" line is the equivalent of the "+" line. More information on RS-422 communications can be found in B&B Electronics’ free RS-422/RS-485 Application Note.

RS-485 Mode

To configure a port for RS-485 mode, 9 jumpers must be checked. The following settings configure Port 1 as RS-485.

1.JP1A - must be set in the "422" (right) position.

2.JP1B, JP1C - must be set in the "485" (left) position.

3.JP1D, JP1E - set to match software and installation requirements.

4.JP1F - all four jumpers must be in the "422" (right) position.

36 Documentation No.3PXCC1x-2x-3903

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B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445	B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445