Introduction

An RIO drop consists of one or two racks of Modicon X80 I/O modules and/or third-party PME SWT 0100 modules. An RIO drop is connected to the daisy-chain loop on which the Ethernet RIO network resides. Each remote drop contains one BM•CRA312•0 adapter module. Each rack in a remote drop contains its own power supply module.

Remote adapter modules are available as Ethernet BME and X Bus BMX communicators. To use X80 I/O modules that require Ethernet, choose a BME-style adapter module. If your X80 I/O uses only X Bus for backplane communication, then you can use a BMX-style adapter module.

The adapter modules are:

Adapter

Description

X80 standard EIO adapter

The BMXCRA31200 is a basic adapter module that supports X Bus communications across the remote backplane, but not Ethernet.

It does not support:

  • an extension rack

  • special-purpose or Ethernet I/O modules

  • native timestamping

  • service port

  • I/O to be solved more than once per logic scan in the remote drop. (It only handles MAST tasks. Your application cannot assign FAST and AUX tasks in it.

X80 performance EIO adapter

The BMXCRA31210 adapter module supports X Bus communications across the remote backplane, but not Ethernet.

It supports:

  • an extension rack

  • special-purpose modules

  • native timestamping

  • service port

  • MAST, FAST, and AUX0/AUX1 task customization of the Ethernet I/O scanner service

eX80 performance EIO adapter

The BMECRA31210 adapter supports Ethernet and X Bus communications across the remote backplane. This adapter needs to be installed in an Ethernet backplane.

It supports:

  • the capabilities of a BMXCRA31210 adapter

  • Ethernet I/O modules on rack slots connected to the Ethernet backplane in the remote drop, such as the BMEAHI0812 and BMEAHO0412 HART-compatible analog modules, and PME SWT 0100 weighing module
NOTE: You can also use these BMECRA312•0 eX80 EIO adapter modules in a Quantum EIO system with a high-end CPU (140CPU6••••) configured on the local rack.

RIO Drop Maximum Configuration

The maximum number of channels in an RIO drop depends on the eX80 EIO adapter module:

EIO adapter

Maximum number of Channels

Discrete

Analog

Expert

Sensor bus

BMXCRA31200

128

16

–

–

BMXCRA31210

1024

256

36

2

BMECRA31210

1024

256

36

2
NOTE: The number of available channels could differ from the maximum values shown because the values depend on the CPU reference and the other modules in the same drop. Refer to the description of Modicon X80 I/O Modules.

To configure Quantum RIO drops, refer to the Quantum EIO installation and configuration guide.

Functionality

The adapters exchange data through the Ethernet I/O scanner service in the CPU on the main local rack of your PAC system:

  • The input data from the RIO drop is collected and published to the I/O scanner.

  • The output modules are updated with the data received from the I/O scanner.

  • The protocol used for exchange is EtherNet/IP.

  • The exchanges are deterministic, which means that the RIO logic is scanned regularly in a scheduled and predictable manner.

NOTE: Refer to your system hardware reference manual to select a CPU that supports the Ethernet I/O scanner service.

External Features

These adapter modules have the same dimensions and installation constraints as the other modules in the Modicon X80 product line:

1 LED display

2 rotary switches

3 SERVICE port (ETH 1)

4 DEVICE NETWORK port (ETH 2)

5 DEVICE NETWORK port (ETH 3)

NOTE: Refer to the LEDs.

The Ethernet ports are labeled on the front of the modules.

NOTE: Insert dust covers into the unused Ethernet ports on the adapter modules:

Ruggedized Versions

The BMECRA31210C and BMXCRA31210C (coated) equipment are the ruggedized versions of the respectively BMECRA31210 and BMXCRA31210 (standard) equipment. They can be used at standard temperatures and in harsh chemical environments.

For more information, refer to chapter Installation in More Severe Environments.

Altitude Operating Conditions

The characteristics apply to the eX80 EIO adapter modules BM•CRA312•0(C) for use at altitude up to 2000 m (6560 ft). When the modules operate above 2000 m (6560 ft), apply additional derating.

For detailed information, refer to chapter Operating and Storage Conditions.