Epson TM U200D Technical Reference - Page 149
Appendix, RS-485 Serial Interface
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Appendix TM-U200D/U200PD Technical Manual RS-485 Serial Interface Data transmission: Synchronization: Handshaking: Signal levels: Baud rates: Data word lengths: Parity settings: Stop bits: Bit serial Asynchronous Depend on the DIP switch settings (DTR/DSR or XON/XOFF control ) 2.0 V to 5.0 V: Logic 1 0.0 V to 0.8 V: Logic 0 Depend on the settings of the TM series printers (2400 to 19200) Depend on the settings of the TM series printers (7 or 8 bits) Depend on the settings of the TM series printers (None, even, odd) Depend on the settings of the TM series printers (1 or more) NOTES: t The handshaking is set through the DIP switches on the TM series printers. The choices indicated in parentheses above are typical choices or a typical range of choices that are supported by the TM series printers. t DR1 > DR2 CS1 > CS2 indicates that: Channel 1 is high. Channel 2 is low. t DR1 < DR2 CS1 < CS2 indicates that: Channel 2 is high. Channel 1 is low. Signal levels and communication control functions CS1 CS2 Function H L Communication is available L H Communication is not available Rev. B Appendix A-1