B&B Electronics ESP904 - Manual User Manual

Page 86

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Original mode

RS-485 Connections

Appendix C

Manual Documentation Number: ESP904-4513m

B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 – www.bb-elec.com

B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 – www.bb-europe.com

To connect 4-Wire RS-485 devices, the RS-422 Mode can be used provided
the ESP904 will be connected as a master in a single master system. If using
multiple masters, the ESP904 cannot be used, as it does not tri-state the
transmitter in RS-422 mode.