Epson 440 - Manual (Page 215)

Reverse channel
Transmission mode: IEEE-1284 Nibble mode
Connector: 57-30360 Amphenol Connector or equivalent
Synchronization: Refer to the IEEE-1284 specification
Handshaking: Refer to the IEEE-1284 specification
Signal level: IEEE-1284 Level 1 device
Data transmission
timing:
Refer to the IEEE-1284 specification
Serial interface
The printer’s built-in serial interface is based on the RS-423 standard. This
interface has the following characteristics:
Standard: Based on RS-423
Synchronization: Synchronous
Bit rate: Approx. 1.8 Mbps
Handshaking: X-ON/X-OFF DTR protocol
Word format:
Data bit 8 bits
Parity bit None
Start bit 1 bit
Stop bit 1 bit
Connector: 8-pin mini-circular connector
Recommended cable: Apple System Peripheral-8 cable
(Part number M0197)
Optional interface
The available interfaces are listed in Chapter 8. Please see the
specifications in the user’s guide packed with the optional interface card.
C
R Easter2 Ref. Guide
Rev.b
A5 size Appendix c
05-29-97 DR, pass 2
Specifications C-11