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RS-232 Connections
Manual Documentation Number: MES1A/MES1B-2106m PN7138-rev001
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
58
Signal Name Label Direction Terminal
Not used Not
used
- 1
Not used Not
Used
- 2
DataB (+) TDB(+) In/Out 3
DataA (-) TDA(-) In/Out 4
Signal Ground GND --- 5
Figure 39. MES1B Terminal Block Pin-out for RS-485 Two-Wire
Operation