Brady 200M - Manual (Page 56)

Parallel Cabling Requirements
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:
1. Keep data cables as short as possible.
Maximum length: 10 ft.
2. Do not bundle the data cables tightly with power cords.
3. Do not tie data cables to power wire conduits.
Parallel Interface
The Parallel Interface provides a means of communication which
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 HI while others are active LOW. The voltage levels
which represent these conditions are:
Data Signal Voltage Level
HIGH +5 VDC
LOW 0 VDC
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M-Series User ’s Guide Interconnections
5-5