Honeywell 900S75-0460 I/O Scanner 2 Module

Honeywell 900S75-0460 I/O Scanner 2 Module

Description

The I/O Scanner 2 module resides in a remote I/O rack along with its I/O in a Redundant Controller System. The Scanner 2 has two I/O connections I/O A is connected to CPU-A and I/O B is connected to CPU-B in the Redundant Controller rack. The scanner 2 collects data from the Input modules populated in its remote rack and communicates the information to the Lead controller. Output data is sent from the Lead controller to the Scanner 2 module which in turn sends the data to appropriate output module. Data exchanges are synchronous with the controller scan time to maintain deterministic operation. Diagnostic status of I/O modules is also monitored and reported to the controller when detected.

The Rack address of a Scanner 2 module is set via switches on the module. Connection to both of the redundant controllers is made using both ports, each conforming uses IEEE 802.4 Ethernet 100baseTxPhysical Layer. An external Ethernet switch is required when multiple I/O scanners are used with a single controller. Scanner modules do support removal and insertion under power.

Status indicators：

  Scanner: Red/Green LED indicates mode or error

  I/O A Port: Green and Yellow LEDs indicate receive/transmit

  I/O A Port: Green and Yellow LEDs indicate receive/transmit 

Power supply loading：5V; 770mA max

Technical Specifications