.%%.
72
33 Reserved -
34 Reserved -
35 Reserved -
36 Selectin In
Notes to the Table
Direction refers to the direction of signal flow as viewed from the printer.
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 sig-
nal and never fail to complete connection 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.
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.
Data transfer must be carried out by recognizing the ACKNLG or BUSY signal.
The cable must have an overall braided shield, Belden 8345 or equivalent.
Connectors must have shielded housings. The overall shield must be bonded to
the shielded housings at both ends of the cable.
Signal Pin No. Signal Description Direction