
Chapter 7 EIA-422 Asynchronous Interface 31
EIA-422 Hardware Handshaking (Ready/Busy) Cable
Use the following table as a guide for EIA-422 wiring. Pin numbers have
been omitted because they vary from product to product. For Digi pin
numbers, see the section titled "Digi EIA-422 Connector Wiring" on page
29. For peripheral device pin numbers, see the documentation for your
peripheral device.
EIA-422 DTE to DCE (Modem) Cable
Use the chart below as a guide for EIA-422 modem wiring. Pin numbers
have been omitted because they vary from product to product. For Digi pin
numbers, see the section titled "Digi EIA-422 Connector Wiring" on page
29. For modem pin numbers, see your modem's documentation.
DTE (Digi End) DTE (Peripheral)
Signal Lead Lead Signal
TxD
+
Connected to
+
RxD
-
Connected to
-
RxD
+
Connected to
+
TxD
-
Connected to
-
RTS
+
Connected to
+
CTS
-
Connected to
-
CTS
+
Connected to
+
RTS
-
Connected to
-
GND Connected to GND
DTE (Digi End) DCE (Modem)
Signal Lead Lead Signal
TxD
+
Connected to
+
TxD
-
Connected to
-
RxD
+
Connected to
+
RxD
-
Connected to
-
RTS
+
Connected to
+
RTS
-
Connected to
-
CTS
+
Connected to
+
CTS
-
Connected to
-
GND Connected to GND
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