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Zebra S-Series User’s Guide 49
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The required cable must have a standard 36-pin parallel connector on one
end, which is plugged into the mating connector located at the upper rear
of the printer. The parallel interface cable is connected using bail clips,
instead of screws, in a similar position to that of the serial data cable.
The other end of the parallel interface cable connects to an appropriate
point at the host computer.
Data cables must be fully shielded and fitted with metal or metallized
connector shells. Shielded cables and connectors are required to prevent
radiation and reception of electrical noise.
To minimize electrical noise pickup in the cable:
• Keep data cables as short as possible (maximum length: 10 ft.).
• Do not bundle the data cables tightly with power cords.
• Do not tie data cables to power wire conduits.
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The parallel interface provides a means of communication that is typically
faster than the previously mentioned serial interface method. In this
method, the bits of data which make up a character are sent all at one time
over several wires in the cable, one bit per wire.
Data signals are defined as either HIGH or LOW, while control signals are
either Active or Inactive. Some control signals are active HIGH while
others are active LOW. The voltage levels which represent these
conditions are:
Data Signal
Voltage Level
HIGH +5 VDC
LOW 0 VDC