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A-B Remote I/O Communication Interface Module How to Identify Module Functions

From:A-B | author:Mr.Chen | Time :2024-07-22 | 242 view: | Share:

ControlLogix AutoMax DCSNet and AutoMax

Remote I/O Communication Interface Modules

Identifying Module Functions

Refer to the following diagram to identify the hardware components of the 56AMXN/B module.

The module has

- Labels that identify the AutoMax DCSNet scanner and remote I/O

- A 4-character scrolling display (XXXX)

- 3 LEDs labelled NET, CLX, and OK to indicate network status, connection to the ControlLogix processor, and its own internal status

- A 9-pin D-type connector for connection to a DCS or remote I/O network

- Switches on the top of the module to set the mode of operation, number of drop-downs, and depth of drop-downs

Switches to set network type and node address

The switches on the top of the module must be used to set the network type, dropdown number, and dropdown depth before installing the module.

The two switches on the left set the dropdown depth and the two switches on the right set the dropdown number.

The following table shows how to set the switches for each mode of operation.

For example, to configure the 56AMXN/B as a DCS slave with a dropdown number of 17 and a dropdown depth of 5. set the switches from left to right to 0. 5. 1. and 7.

Any other setting is invalid and causes the module to enter the Fingerwheel Test mode. In Fingerwheel Test mode, the display shows the current switch settings.

It will not exit the thumbwheel test mode until power is removed.

In the Thumb Wheel Test Mode, the 56AMXN/B initially displays ‘Thumb Test Mode’ on the 4-character display, the

The display switch is set for 5 seconds, then the display resumes showing ‘Thumb Test Mode’.

For DCS slave operation, if the air drop number and air drop depth are individually valid but combined produce an invalid melt

If the drop number and drop depth are valid individually, but the combination produces an invalid drop number (e.g., drop number 55.), the module will display the drop number in the 4-character display,

then the module will display an error message on the 4-character display, but will not enter the thumbwheel test mode.

but will not enter the thumbwheel test mode.

Determining Module Slot Location

The following figure shows the slot numbering for a 4-slot chassis. Slot 0 is the first slot

Always the leftmost slot in the rack (first slot to the right of the power supply).

You can use any size ControlLogix chassis and install modules in any slot.

You can also install multiple 56AMXN/B modules in the same chassis. The number of modules the power supply can hold (i.e., the power supply's rating).

Installing or Removing Modules When the Power Supply is Connected

56AMXN hardware versions prior to O-57677-1 do not support the removal and insertion of modules while powered on.

Hardware versions can be identified by looking for a sticker with part number

O-57677-1 or later stickers (near the serial number - you do not need to disassemble the 56AMXN module.

(You do not need to disassemble the 56AMXN to find the sticker). Modules without stickers are hardware version O-57677 and do not support removal and insertion while powered on.

For modules with hardware version O-57677-1 and above, you can install or remove the module with the chassis powered on if the following precautions are followed.

Wiring the AutoMax Network Connector

Connect the module to the coaxial network cable using the 612574-36R step-down cable and passive tap changer M/N 57C380 provided by Rockwell Automation Systems Business Unit.

The cable is down-turned and has a ferrite to reduce EMI. it must be used for CE applications. You can also use the drop cable 612403-036R, but it points upward.

The drop cable is a 3 ft long multi-core cable with a 9-pin D-shell connector on each end. One end connects to the connector on the module and the other end connects to the passive splitter.

The passive splitter has two BNC connectors for connecting the coaxial cable to the termination load.

The network coaxial cable must be connected to the splitter at the physical end of the network using a 75-ohm termination load. There should be and only two terminators on the network.

For DCS, the network cable can be either RG-59/U or RG-11/U. For remote I/O, the cable must be RG-59/U.

Powering Up the Rack

Turn on the rack power.

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