Connect-tech Blue Heat/PCI PCI Serial Communications Manual de usuario descargar pdf (Pagina 32)

Blue Heat/PCI User’s Manual, Connect Tech Inc.

Revision 0.11 32

Blue Heat/PCI RS-422/485 (6+2 model)

The Blue Heat/PCI RS-422/485 (6+2 model) offers full RS-422/485 support in hardware like the

other Blue Heat/PCI RS-422/485 models. The modes include full duplex, half duplex, and multi-

drop slave. The Blue Heat/PCI RS-422/485 (6+2 model) offers the following additional

functionality.

Tri-state Control

The Blue Heat/PCI RS-422/485 6+2 model allows you to tri-state the line drivers on power up.

To tri-state the drivers on power up please make certain there is no jumper installed across the

pins on jumper block JI. Please refer to Figure 4 for the location of J1.

Line Bias/Termination

You can use jumpers J2, J3, J4, J5, J6, J7, J8, J9, J10, J11, J12, and J13 to terminate and bias

TxD ±, RxD ±, RTS ±, and CTS ± on the RS-422/485 ports 7 and 8. Please refer to Figure 11 for

a partial schematic of the RS-422/485 circuit for the Blue Heat/PCI RS-422/485 (6+2 model)

and Figure 4 for the location of J2, J3, J4, J5, J6, J7, J8, J9, J10, J11, J12, and J13.

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Connect-tech Blue Heat/PCI PCI Serial Communications Manual de usuario Pagina 32