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Connect Tech Xtreme/104-Plus, PCI-104 and PCI/104 Express Family User Manual

Revision 0.08

Connectors/Pinouts

Xtreme/104 Plus

Figure 12: 40 Pin Connector: Pin Numbering

Table 1: I/O Signal Assignments for RS-423 Models

Header

Port Number

Header

Pin Number

RS-423

Direction

RxD+

Input

CTS-

Input

RxD-

Input

RTSRef (RTS+)

Signal Reference

TxDRef (TxD+)

Signal Reference

CTS+

Input

TxD-

Output

RTS-

Output

GND

Ground [1]

N/C

No connection

RxD+

Input

CTS-

Input

RxD-

Input

RTSRef (RTS+)

Signal Reference

TxDRef (TxD+)

Signal Reference

CTS+

Input

TxD-

Output

RTS-

Output

GND

Ground [1]

N/C

No connection

RxD+

Input

CTS-

Input

RxD-

Input

RTSRef (RTS+)

Signal Reference

TxDRef (TxD+)

Signal Reference

CTS+

Input

TxD-

Output

RTS-

Output

GND

Ground [1]

N/C

No connection

RxD+

Input

CTS-

Input

RxD-

Input

RTSRef (RTS+)

Signal Reference

TxDRef (TxD+)

Signal Reference

CTS+

Input

TxD-

Output

RTS-

Output

GND

Ground [1]

N/C

No connection

Note: [1] 47Ω to GND. Ground is connected to the DC ground by a 47Ω

resistor to reduce ground loop current.

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 32 33

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