SPECIFICATIONS
Part No.: IC660BBA024
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Size: 8.83” (22.44cm) x 3.34” (8.48cm) x 3.91” (9.93cm)
Weight: 4 lbs. (1.8 kg)
LEDs (I/O Block): Unit OK, I/O Enabled
Block to Block Isolation: 1500V for one minute
Group to Group Isolation: 1500V RMS
Heat Dissipation: 12 Watts maximum
Operating temperature: 0o C to +6oC
Storage temperature: -40o to +100o C
Humidity: 5% to 95% (non-condensing)
Product Type: Analog I/O block
Availability: In Stock
Series: Mark I and II
Functional Description
IC660BBA024 is an Analog I/O block developed by GE. It is part of the Mark I and II control system. It is part of the GE Fanuc Genius I/O Series, designed to interface with devices that accept 4mA to 20mA analog signals. It operates on a rated voltage of 24/48 VDC. It features isolated power for all six circuits—four inputs and two outputs. This isolation eliminates the need to separate power supplies for 4mA to 20mA devices, simplifying system wiring and improving reliability.
Features
- Input Channels: The block is equipped with four independent input channels, each of which has a 24V current loop power supply capable of providing 25mA of current. These channels utilize voltage-to-frequency converters and counters to convert the analog signals into digital data. The signals are then converted into engineering units before being sent to the central processing unit (CPU).
- Input Accuracy and Resolution: Each input channel is isolated from the other circuits within the block, ensuring accurate signal processing and minimizing interference. The input accuracy is 0.1%, providing precise measurements for process control. Input resolution is programmable, with a 1 micro A resolution for a 200mS conversion time. The conversion times are adjustable, ranging from 16mS to 400mS, with longer conversion times offering increased resolution.
- Output Channels: The block features two independent output circuits, each possessing the same electrical configuration as the inputs but isolated from other circuits. These output channels utilize a dual 12-bit digital-to-analog converter (DAC), enabling precise control of the output currents, which range from 0mA to 24mA. Output accuracy is 0.15% at 25oC, with a 6µA resolution for each output.
- Configuration and Diagnostics: The block is fully configurable using software, and its diagnostics are built into the system. The block can be used with or without a 24/48 VDC Bus Switching Module in a redundant bus cable system. The Genius series comes with diagnostic capabilities, ensuring that the block’s performance can be monitored and maintained without needing additional calibration from the user.
- Maintenance and Installation: One of the key advantages is the ease of maintenance and upgrades. The block features a modular design that allows the user to replace the electronics assembly without disturbing the existing field wiring. The terminal assembly and electronics assembly are separate, and the electronics can be swapped out easily. To remove the electronics assembly, simply unscrew the holding screws at the top and bottom, and use a block puller tool to detach the terminal assembly.
- User-Friendly Interface: A handheld monitor can be used to view the output as engineering units, user-friendly for operators and technicians. This feature simplifies the task of monitoring real-time data and ensuring the system is operating correctly.
- Redundancy and System Integration: When installed in a redundant bus cable system, the block benefits from dedicated digital outputs that facilitate pairing with a 24/48 VDC Bus Switching Module. This redundancy helps ensure the reliability of the system, especially in critical applications where continuous operation is required.
Diagnostics
- The Analog I/O Block is equipped with various built-in diagnostic features that help ensure its reliable operation and simplify maintenance by identifying potential issues early. These diagnostics monitor both the input and output signals, as well as the internal health of the block, providing real-time feedback to the user.
- One of the key features is input low and high alarm detection, which continuously monitors the input signals to ensure they stay within the specified range. If an input signal exceeds either the low or high threshold, the system triggers an alarm, notifying the operator of a potential issue. This ensures that only valid data is processed and prevents incorrect control actions that might result from faulty input signals.
- The block also includes overrange and underrange detection for both inputs and outputs. This diagnostic feature ensures that the signal levels for both inputs and outputs do not exceed the allowable range. If an input or output signal goes beyond the acceptable boundaries—either too high (overrange) or too low (underrange)—the system flags the condition. This helps to prevent erroneous data from being sent to the central processing unit (CPU), ensuring that the control process remains accurate and reliable.
- Another critical diagnostic is input open wire detection, which monitors the input wiring for any open circuits or disconnections. If any of the input wires become disconnected or there is a fault within the wiring, the system will detect it and trigger an alert. This helps prevent the system from continuing to operate with missing or incorrect input signals, which could lead to failures or miscalculations in the control process.
- Output feedback error detection is another important feature that ensures the integrity of feedback signals coming from output devices. This diagnostic compares the feedback signal from devices such as actuators or valves with the expected value. If there is a discrepancy or an error in the feedback signal, the system reports the issue. Detecting these feedback errors helps to maintain control accuracy, particularly in systems that rely on closed-loop feedback for precise operation.
- Lastly, the internal fault reporting feature detects and reports any internal faults within the block itself. This diagnostic checks the internal circuits, communication paths, and power supplies, and if any failure is detected, it will be reported to the user. This ensures that hardware problems are identified quickly, preventing further system degradation and reducing downtime.
Output Specifications
- Output accuracy at 250 C: 0.15% of full scale reading
- Output resolution: 6microA
- Output update frequency: 6ms to 8ms typical
- Range: 4mA to 20mA
- Overrange capacity: 0mA to 24mA
- Output diagnostics :Underrange, Overrange, Feedback error
- Output load: 0 Ohms to 850 Ohms
- Thermal drift (from 25°C): 35 PPM per degree C typical
Input Specifications
- Input accuracy: (at 25o C) 0.1% of full scale reading
- Input resolution: 1microA
- Input conversion time: 16.6ms to 400ms (user selectable)
- Range: 4mA to 20mA
- Overrange capacity: 0mA to 25mA
- Input diagnostics: Under / Overrange, High /Low Alarm, Open Wire
- Channel to channel isolation: 1500V rms
- Thermal drift (from 25o C): 70 PPM per degree C typical
- Input Impedance: 100 Ohms +/-5%
- Normal Mode Rejection: -45 dB at 50, 60 Hz
Compatibility
- The Analog I/O Block requires specific hardware and software versions for proper configuration and operation. The Hand-held Monitor, model IC66*HHM501E (version 3.7) or later, is necessary to configure the block. This monitor serves as the interface for configuring parameters, viewing diagnostics, and ensuring the block functions properly within the system.
- For IC697 series PLCs, compatibility depends on the specific CPU version:
- CPU731 must be version G or later.
- CPU771 must be version E or later. Additionally, the programming software for these PLCs must be version 2.02 or later, and a Bus Controller of model IC697BEM731C or later is required to ensure proper communication with the block.
- For IC600 series PLCs, the CPU must be revision 105 or later. If using an IC600 Plus series PLC, the revision must be 110 or later. The corresponding programming software must be release 4.02 or later to ensure full compatibility.
- For IC550 series PLCs, the CPU must be revision 3.0 or later, and the programming software must be release 2.01 or later for successful integration with the block.
- In the case of using a Bus Switching Module directly connected to the block, it must be the 24/48 VDC version (IC66*BSM021) to ensure compatibility and proper functioning within the system.
Installation Instructions
Before installation, it's crucial to carefully inspect all shipping containers for any visible damage. If any equipment is found to be damaged, immediately notify the delivery service, and keep the damaged shipping container for their inspection. Once the equipment is unpacked, record all serial numbers for inventory and tracking purposes. It's recommended to save the shipping containers and packing materials, as these may be needed if any part of the system requires future transportation or shipping.
Block Mounting
- The Genius I/O blocks, including the Analog I/O Block, are classified as "open equipment," meaning they must be installed within a protective enclosure to prevent environmental damage and ensure safe operation. The installation location should be free of airborne contaminants and provide adequate cooling airflow to prevent overheating.
- The block can be mounted either right side up or upside down, depending on the preferred layout. However, it's essential to leave at least 2 inches of space between the blocks to allow proper ventilation and prevent overheating.
- To mount the block, begin by drilling two screw or bolt holes for 8-32 hardware. Position the block such that the notches in the upper and lower flanges align with the mounting holes. Secure the block in place using 8-32 screws. To maintain ground integrity, it's important to use star washers when attaching the block to ensure a solid electrical connection and prevent potential grounding issues during operation.
The WOC team is always available to help you with your Mark I and II requirements. For more information, please contact WOC.
Frequently Asked Questions
What is IC660BBA024?
It is an Analog I/O block developed by GE under the Mark I and II series.
How do I install the block?
Installation requires careful inspection of shipping containers for any damage before unpacking. Upon receiving the equipment, record serial numbers and save shipping materials. Ensure the block is mounted in a protective enclosure in a clean, well-ventilated area with sufficient cooling airflow. The block can be mounted right side up or upside down, but at least 2 inches of space should be left between blocks. Use 8-32 screws and star washers to secure the block.
Can the block be installed in any orientation?
Yes, the block can be mounted either right side up or upside down. However, it’s crucial to maintain at least 2 inches of clearance between blocks for proper cooling and ventilation.
How do I replace the electronics assembly in the block?
The electronics assembly of the block can be replaced without disturbing the field wiring. To replace the assembly, unscrew the holding screws at the top and bottom of the assembly. Then, use a block puller tool to remove the terminal assembly. This makes upgrading and repairs easier.
What kind of power supply is required for the block?
The Analog I/O Block operates with a 24/48 VDC power supply. This power configuration is necessary to ensure the correct functionality of the block and to interface with the connected PLC systems.
