Niagara NPB-2X-485 Install Sheet Download Page 4

RS-485 Option Card Install Sheet

Updated: January 16, 2012

Part Number 11873  Rev 1.1

COM Port Usage

COM Port Usage

 

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Summary of Contents for NPB-2X-485

Page 1: ...ors Note An earlier NPB 2X 485 option card does not have Bias jumpers It operates like the newer option card in factory shipped state jumper blocks not installed no biasing Installing jumpers to enable biasing adds two onboard 3 3K ohm resistors into an RS 485 port s circuit from RS 485 to 5V from RS 485 to Ground Biasing sometimes improves RS 485 communications by eliminating indeterminate idle s...

Page 2: ...t the cover off Note If accessory modules are plugged into the JACE you may need to slide them away from the unit to get to the cover tabs For the T 202 602 XPR first remove the right cover then the left cover retaining the two screws that secure each cover 3 If a T 200 600 series or Security JACE remove the battery and bracket assembly by taking out the screws holding it in place setting screws a...

Page 3: ...r each port are described as follows TX yellow Transmit indicates that the JACE is sending data to a device connected on the RS 485 trunk RX green Receive indicates that the JACE is receiving data from a device connected on the RS 485 trunk COM Port Usage The NPB 2X 485 option card has two onboard UARTs and so adds two COM ports on the installed JACE controller The hosted station automatically res...

Page 4: ... fea tures contained herein are covered by one or more U S or foreign patents This document may be copied by parties who are authorized to distribute Tridium prod ucts in connection with distribution of those products subject to the contracts that authorize such distribution It may not otherwise in whole or in part be copied photocopied reproduced translated or reduced to any electronic medium or ...

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