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Unit 3: Installation
S8400 Series Operator Manual
3-12 PN: 9001160B
IEEE1284 PARALLEL INTERFACE
The parallel interface is a plug-in module that can be installed by the user and conforms to IEEE1284
specifications. It automatically detects the IEEE1284 signals and operates in the high speed mode. If the
IEEE1284 signals are not detected, it will operate in the slower standard Centronics mode. For this reason, an
interface cable and host interface conforming to the IEEE1284 specification must be present to fully utilize the
speed capabilities. This interface also operates bi-directionally and can report the status of the printer back to the
host.
Figure 3-9, Parallel Connector Pin Assignments
X-ON/X-OFF CABLE REQUIREMENTS
Communicates with the host to determine if the printer is ready to receive data by sending “XON” (HEX 11H) or “XOFF” (HEX
13H) code to the TD line. The single and multiple item buffers are switchable in the Interface Mode of the printer.
DB9 DB25 HOST DIRECTION DB25 PRINTER
1 1 FG (Frame Ground) Bi-Directional 1 FG (Frame Ground)
2 3 RD (Receive Data) To Host 2 TD (Transmit Data)
3 2 TD (Transmit Data) To Printer 3 RD (Receive Data)
5 7 SG (Signal Ground) Bi-Directional 7 SG (Signal Ground)
NOTE: Depending on the host used, it may be required to loop CS and RS
(maintaining at high-level) on the host side. For more information, refer to the host
computer documentation.
NOTE: Refer to the Charts & Diagrams unit of this manual to view timing charts for
Ready/Busy and X-ON/X-OFF.
SPECIFICATIONS
Printer Connector AMP 57-40360 DDK (or equivalent)
Cable Connector AMP 57-30360 DDK (or equivalent)
Cable 1.5 meter or less
Signal Level High = +2.4V to +5.0V, Low = 0V to -0.4V
Data Stream <ESC>A . . Job#1 . . <ESC>Z<ESC>A . . Job#n . . <ESC>Z