Ground The Printer Power Cables; Printer Power Cable Voltage - Intermec 6820 Installation Instructions Manual

Printer Power Cable Voltage

Voltmeter Readings for Printer Power Cable
Voltmeter Voltmeter
red lead black lead
Pin 1 Pin 2
Pin 1 Pin 3
Pin 2 Pin 3
6820 Printer Installation Instructions

Ground the Printer Power Cables

The printer power cable has a ground strap that must fasten to vehicle
sheet-metal to ensure proper cable shielding. This ground strap is the wire
with a ring terminal by the white connectors between the dc power cable
and the vehicle battery cable.
Follow these steps to fasten the ground strap:
1 Drill a small hole (slightly smaller than the screw diameter) where to fasten
the chassis ground strap for the power cable connector. Use a punch to
dimple and enlarge the hole.
2 Scrape a small circle of paint from around the hole to ensure a good elec-
trical connection.
3 Use a #8 x 5/8" screw and flat washer to secure the strap.
Note: This is the correct polarity for 6820 Printers.
Verify the printer power cable voltage and polarity (as indicated), then plug
the printer dc power cable into the printer power connector.
Use a volt meter to test the cable before connecting the cable to the 6820
Printer. Set the voltmeter for dc volts.
Reading
Meaning
DC Volts
• If zero volts, check the battery connections.
12-15
• If a negative voltage, the wires on the battery are reversed. Do not con-
nect to printer.
• If less than 12 volts, vehicle battery or connections are bad.
• If more than 15 volts, connection is across more than one 12-volt bat-
tery or truck charging system is faulty. Do not connect to printer.
12-15 If zero volts, check the connection done on the previous page.
0 If not zero volts, check the connection to the battery negative terminal
and the connection done on the previous page.
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