dh485 communication interface module for controllogix

mvi56-dh485

the mvi56-dh485 module acts as a gateway between the dh485 network and the allen-bradley"s controllogix backplane. the data transfer from the controllogix processor is asynchronous from the actions on the dh485 network. a 4000-word register space in the module is used to exchange data between the processor and the dh485 network.

features

• the module has a common interface file (cif) with 244 words that can be accessed by remote dh485 nodes
• read and write commands can be sent associated to the following file types: status, bit, timer, counter, control, integer, float, and cif
• user-definable module memory usage
• two ports emulate the dh485 devices (peer-to-peer) with distinct node addresses
• all configuration information contained in a single, user-defined text file
• controllogix backplane interface
• all module-related data is contained in an internal database
• ability to add or remove nodes without disruption of the network
• baud rates: 9600 or 19200 baud

applications

the mvi56-dh485 module can be used in any application where dh485 network connectivity is required with the controllogix platform. compatible devices on a dh485 network include:

• slc 5/03
• slc 5/05 (rs-232 channel)
• 1746 - bas
• mvi56-bas

functional specifications

the mvi56-dh485 module actively issues dh485 commands to other nodes on the dh485 network. one hundred user-defined commands are supported by the module on each port. the controllogix processor can be programmed to control the activity on the port by actively enabling or disabling each command directly from the ladder logic.

the module also accepts dh485 commands from an attached dh485 master unit (e.g., slc 5/03 processor ladder logic msg instruction). the module permits a remote master to interact with all data contained in the module. this data can be derived from other dh485 slave devices on the network through a master port or from the controllogix processor.

physical specifications

• controllogix form factor - single slot

• connections

  - (2) rj45 connectors for support of rs-232, rs-422, or rs-485 interfaces for the dh485 interface drivers

  - (1) rj45 rs-232 configuration tool connector

note: when using an rs-485 connection, the usage of aic+ devices from allen-bradley is required (user-supplied).

hardware specifications

• application serial ports (prt1, prt2)- application port to db-9m pc compatible connector is supplied- rs232/422/485 jumper se-lectable- rs232 handshaking configurable- 500v optical isolation from backplane

• form factor:- single slot - 1756 chassis compatible- local or remote rack
• backplane current load: 800 ma @ 5 v
• operating temperature: 0 to 60 deg c (32 to 140 deg f)
• storage temperature: -40 to 85 deg c (-40 to 185 deg f)
• shock:- 30g operational- 50g non-operational
• vibration: 5 g from 10 - 150 hz
• relative humidity: 5-95% (w/o condensation)
• led indicators:- module status- backplane transfer status- application status- serial activity and error led status
• configuration serial port (prt1):- db-9m pc compatible- rs-232 only- hardware handshaking

ordering information