B&B Electronics ESR901, ESR902, ESR904 - page 27

Making the Hardware Connections
Manual Documentation Number: ESR90x-0508m Chapter 2 17
B&B Electronics Mfg Co Inc – 707 Dayton Rd - 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
Port Interface Type
Jumper
Number Pull up/pull down
1
485 half duplex J22 pull up
J17 pull down
422/485 full duplex J7 pull up
J21 pull down
CTS J13 pull up
J9 pull down
2
485 half duplex J3 pull up
J2 pull down
422/485 full duplex J8 pull up
J20 pull down
CTS J14 pull up
J28 pull down
3
485 half duplex J12 pull up
J27 pull down
422/485 full duplex J6 pull up
J19 pull down
CTS J11 pull up
J26 pull down
4
485 half duplex J16 pull up
J24 pull down
422/485 full duplex J5 pull up
J18 pull down
CTS J10 pull up
J25 pull down
Figure 11. ESR904 Bias Jumpers
N
No ot te e: :
(For more information on RS-485 Receiver Biasing, see B&B Electronics RS-
422/485 Application Note available at www.bb-elec.com)