Note:

•All interface conditions are based on TTL level. Both the rise and fall of each signal must be less than 0.2 microseconds.

*Data transfer must be carried out by observing the ACKNLG or BUSY signal. (Data transfer to this printer can be carried out only after the receipt of the ACKNLG signal or when the level of the BUSY signal is LOW).

The column heading "Direction" refers to the direction of the signal flow as viewed from the printer.

“Return” denotes the twisted-pair return to be connected at signal ground level. For the interface wiring, be sure to use a twisted-pair cable for each signal and to complete: the connection on the return side.

Interface timing

The figure below shows the timing for the parallel interface.

Technical Specifications B-9