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PCI Communication
User Manual
46
For DTE to DCE connections, use a straight-through cable (i.e., you do not need to reverse
Lines 2 and 3, Lines 4 and 5, or Lines 6 and 20 since, in general, DCE RS-232 interfaces are
reversed themselves).
Therefore, if you are not using CTS, RTS, DSR, DTR, or DCD signals, short Pins 4 and 5
together, and short Pins 6, 8, and 20 together.
5.2.2
RS-422 Signal Wiring
The RS-422 interface wiring is based on the one-on-one principle. The transmit lines
on one side connect to the receive lines on the other side (and vice versa). With RS-
422, you can transmit and receive data simultaneously (full duplex). The connections
are as follows:
Termination Resistors Setup
Termination resistors are onboard and can be selected by using a jumper for 120 or
300
Ω
. Each pair of signal lines has a separate resistor (RxD+/-, TxD+/-).
Table 5.17: Terminal Without Handshake
DB-25 Male
Terminal, PC (DTE)
Pin
Signal
Pin
Signal
2
TxD
3
RxD
3
RxD
2
TxD
4
RTS
5
CTS
7
GND
7
GND
6
DSR
20
DTR
8
DCD
Table 5.18: RS-422 DB9 Pin Assignment
DTE (Male DB-9)
Terminal DTE
Pin
Signal
Pin
Signal
1
TxD-
1
RxD-
2
TxD+
2
RxD+
3
RxD+
3
TxD+
4
RxD-
4
TxD-
5
GND
5
GND
6
RTS-
6
CTS-
7
RTS+
7
CTS+
8
CTS+
8
CTS+
Summary of Contents for PCI Series
Page 1: ...User Manual PCI COMM Series User Manual Industrial Serial Communication Cards ...
Page 10: ...PCI Communication User Manual x ...
Page 11: ...Chapter 1 1 Introduction ...
Page 16: ...PCI Communication User Manual 6 ...
Page 17: ...Chapter 2 2 Hardware Configuration ...
Page 22: ...PCI Communication User Manual 12 2 2 7 PCI 1622C Figure 2 7 PCI 1622C Silk Screen ...
Page 28: ...PCI Communication User Manual 18 ...
Page 29: ...Chapter 3 3 Driver Setup and Installation ...
Page 32: ...PCI Communication User Manual 22 ...
Page 34: ...PCI Communication User Manual 24 ...
Page 35: ...Chapter 4 4 ICOM Tools ...
Page 45: ...Chapter 5 5 Pin Assignments and Wiring ...
Page 58: ...PCI Communication User Manual 48 ...