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Auxiliary Port
The Auxiliary Port
34
P1059693-001 Rev. A ZKDU User’s Guide 6/4/2013
The Auxiliary Port
The Auxiliary port is capable of supporting a single wedge device (barcode scanner, weight
scale, 10-key pad, etc.). The key features are:
• Only receives input data for auxiliary device.
• It is only active during Form data entry operations.
• It is active in both EPL and ZPL Form data entry operations.
• Includes low current +5 volt DC to power wedge devices.
• The port is configured as a Data Terminal Equipment (DTE) port.
Auxiliary Port Communication Configuration
Auxiliary port communication settings:
• Baud Rate: 4800
• Parity: none
• Data bits: 8
• Stop bits: 1
• Flow control: Hardware
• Data flow: Input only
ZKDU Pinout Configuration
The Auxiliary port connector is a Female DB-9. Low current +5 volt DC is supplied on pin 9
of the auxiliary port to retain backward compatibility to the KDU classic.
The + 5 Volt DC power supplied to the ZKDU via the printer, draws 50 mA for the ZKDU.
The remaining current is available to power peripheral devices attached to the ZKDU via the
Auxiliary Port. The current available depends upon the Zebra label printer type attached to the
port.
• Printers with ZPL allow 750 mA - 50 mA (ZKDU draw) = 700mA
• EPL only printer allow 250 mA - 50 mA (ZKDU draw) = 200mA
PIN NAME DIRECTION
1 DCD NOT USED
2 TXD NOT USED
3 RXD FROM AUX DEVICE
4 DTR NOT USED
5 GND
6 DSR TO AUX DEVICE
7 RTS NOT USED
8 CTS TO AUX DEVICE
9 +5V (RI) TO AUX DEVICE