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10 Electrical and Mechanical Interfaces

PCLTA-21 Board Layout

The following figure shows the layout of the PCLTA-21 card Models 74501, 74502, 74503, and

74504.

The PCLTA-21 card Model 74504 (TP-RS485) includes jumpers that must be configured to set the

correct speed on the RS-485 channel.

P1 and P2 PCI Bus Connector

The pinout of the PCI connector is the standard pinout for the 32-bit PCI bus used in Windows-

compatible computers. The power drawn from the host is 250 mA @ 5 VDC, typical.

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Echelon PCLTA Network Interface Manuale Utente Pagina 18