QMS Magicolor WX, User Manual

Page: 233 / 248

Centronics
Parallel Cable
Specifications
B-5 Technical Specifications
Notes to the Parallel Pinouts Table
n
Direction refers to the direction of signal flow as viewed from the
printer.
n
Return denotes “twisted-pair return” and is to be connected at
signal-ground level. When wiring the interface, be sure to use a
twisted-pair cable for each signal and never fail to complete con-
nection on the return side. To prevent noise effectively, these
cables should be shielded and connected to the chassis of the
system unit and printer, respectively.
n
All interface conditions are based on Transistor-Transistor Logic
(TTL) level. Both the rise and fall times of each signal must be
less than 0.2 microseconds.
n
Data transfer must be carried out by recognizing the ACKNLG or
BUSY signal.
10 Acnlg- Out
11 Busy+ Out
12 Pe+ Out
13 Select Out
14 Autofeed In
15 Reserved -
16 Ground -
17 Ground -
18 Vcc Test -
19-30 Ground -
31 Iprime In
32 Fault- Out
33 Reserved -
34 Reserved -
35 Reserved -
36 Selectin In
Signal Pin No. Signal Description Direction