AB Cat. No. 1794-ACNR FLEX I/O ControlNet Redundant Media Adapter

AB Cat. No. 1794-ACNR FLEX I/O ControlNet Redundant Media Adapter

Component Description: Describes in detail the components of the adapter, including the ControlNet adapter module, indicator lights, ControlNet network cable BNC connectors (3a, 3b, 3b 1794-ACNR15 only), ControlNet node selector jog wheel switch, programming terminal connector port, module locking tab, +24V dc connector, 24V common connector, and Flexbus connector, clarifying the location and basic function of each component in the device.

Mounting Procedure

Mounting to DIN rail: Place the adapter module on the 35 x 7.5mm DIN rail at an angle, hang the hook on the back of the adapter and rotate it onto the rail, press it against the rail and the locking tab will automatically snap into place. If it does not lock properly, use a screwdriver or other tool to press down on the locking tab and operate the adapter until it locks, and then proceed with wiring.

Note: When installing the adapter, make sure that the hooks on the terminal block are correctly hooked into the adapter, otherwise backplane communication may be interrupted.

Interpretation of Status Indicators: The indicators provide a visual indication of the operating status of the adapter. For example, if Comm A and Comm B are off at the same time, it may indicate that there is no power supply or it is in the reset state; if they show red colour at the same time, it means that the adapter is not working; if they flash red/green alternately, it means that the adapter is performing self-test; if they flash red/black alternately, it may mean that the node is mis-configured (the address is duplicated). Comm A or Comm B display different status individually, such as off means the channel is disabled, green means the channel is running normally, etc. There are also other status indicators corresponding to different statuses such as online but not connected, connected normally, recoverable fault, adapter failure, etc.

Specification

Electrical Parameters: Input voltage range is 19.2V to 31.2V dc (with 5% AC ripple) and communication rate is up to 5M Bits/s. Current consumption is 640mA at 5V dc and 400mA from external 24V power supply; maximum power consumption is 4.6W at 19.2V dc and thermal dissipation is 15.7 BTU/hr.

Environmental parameters: Operating temperature range is 0 to 55°C (32 to 131°F), non-operating temperature range is -40 to 85°C (-40 to 185°F), and relative humidity is 5% to 95% non-condensing. In terms of shock and vibration, it can withstand 30g peak acceleration, 11 (+1) ms pulse width in operation, 50g peak acceleration, 11 (+1) ms pulse width in non-operation, and has been tested to withstand vibration of 5g @ 10 - 500Hz (in accordance with IEC 68 - 2 - 6).

Other parameters: I/O capacity for connecting 8 modules, cable for Belden RG-6/U, 12 gauge (4mm²) stranded wire, maximum insulation thickness 3/64 inch (1.2mm), terminal screw torque requirement 7-9 in-lb.

Approval information: The adapter is certified by several authorities, such as CSA certification, CSA Class I, Division 2 Groups A, B, C, D, UL listing and CE marking (in accordance with all applicable directives), which indicates that the product meets the relevant safety and quality standards and is legal for sale and use in the respective markets.

Performance characteristics

Communication Performance

High-speed communication: Supporting a communication rate of 5M Bits/s, it can achieve high-speed data transmission in ControlNet network to meet industrial automation scenarios requiring high real-time performance, such as data interaction and cooperative control between a large number of devices in industrial production lines, to ensure fast and accurate data transmission and to reduce the delay in system response.

Redundant design: Equipped with two ControlNet network cable BNC connectors (3a and 3b, model 1794 - ACNR15), with communication redundancy function. When one communication link fails, it automatically switches to the other, guaranteeing communication continuity, increasing system reliability and reducing the risk of production downtime due to communication interruptions.

Adaptability

I/O module connection: The I/O capacity is 8 modules, which can connect various types of FLEX I/O modules, such as digital, analogue, thermocouple and RTD modules, to meet the diversified needs of different industrial equipment for the number and type of I/O points, and facilitate the construction of complex automation control systems.

Network Adaptation: It can be used as a node of ControlNet network, and the address setting can be done through the node selection dial switch, which can be well adapted with other ControlNet network devices to achieve interconnection and intercommunication among devices, and flexible networking in the industrial network architecture.

Stability

Wide voltage range: The operating voltage range is from 19.2V to 31.2V dc (including 5% AC ripple), which is highly adaptable to the power supply and can operate stably under different power supply conditions, reducing equipment failures due to power supply fluctuations and ensuring normal operation in complex industrial power supply environments.