SPECIFICATIONS
Part Number: IS220PDIOH1A, REV G
Manufacturer: General Electric
Series: Mark VIe
Product Type: Discrete Input/Output Module
Number of input channels: 24 dry contact voltage input channels
Input Filter: Hardware filter, 4 ms
Number of relay command channels: 12 relays
Availability: In Stock
Country of Manufacturer: United States (USA)
Functional Description
IS220PDIOH1A, REV G is a Discrete Input/Output Module revision G version manufactured by General Electrics. It is a part of the Mark VIe control system. The I/O pack is an interface component used in control systems, specifically designed to bridge one or two Ethernet networks with a discrete input/output terminal board. It includes a processor board, which is standard across all Mark VIeTM distributed I/O packs, and an acquisition board tailored for discrete input/output functionality. This pack can manage up to 24 contact inputs and control up to 12 relay outputs, and it also monitors feedback signals specific to the terminal board it is connected to. The terminal board associated with the PDIO determines the pack's voltage handling capabilities.
Features
- System connections to the PDIO pack are established via two RJ45 Ethernet connectors for network communication and a three-pin power connector for power input. Discrete signal input and output pass through a DC-62 connector, which directly interfaces with the associated terminal board.
- Additionally, the PDIO provides visual diagnostic support through LED indicators, with local diagnostic communications enabled via an infrared port.
- The PDIO is the functional equivalent of the PDIA and PDOA I/O packs combined into a single unit. In simplex applications, it connects to a TDBS terminal board, which combines the functionalities of an SRLY relay terminal board and an STCI contact input terminal board.
- For Triple Modular Redundant (TMR) applications, it is installed on a TDBT terminal board with a WROB option, providing the equivalent capabilities of a TRLYH1B relay terminal board paired with a TBCI contact input terminal board.
Installation
- Mount the Terminal Board: Securely attach the selected terminal board to its designated mounting location, ensuring it is stable and properly aligned.
- Connect the Pack(s): For simplex configurations, insert one PDIO I/O pack into the terminal board’s connector. For Triple Modular Redundant (TMR) configurations, insert three I/O packs, each connecting to the terminal board’s connectors.
- Mechanically Secure the PDIO Packs: Use the threaded studs located next to the Ethernet ports to secure the PDIO packs to the terminal board. These studs fit into a mounting bracket designed for the terminal board type. Adjust the mounting bracket so that no right-angle stress is placed on the DC-62 connector between the PDIO pack and the terminal board. This adjustment typically only needs to be done once for the product’s lifetime, ensuring a secure and stable connection.
- Connect Ethernet Cables: Depending on your system’s configuration, connect one or two Ethernet cables to the pack. The PDIO pack is designed to function using either Ethernet port. In dual-connection setups, it’s standard to connect ENET1 to the network associated with the R controller for improved redundancy and system performance.
- Apply Power: Connect the power cable to the PDIO pack using the three-pin power input on the side of the pack. Power does not need to be turned off while connecting the cable, as the I/O pack features a soft-start capability that controls inrush current when power is applied.
- Configure the PDIO Pack: Once the pack is powered on, configure it according to your system requirements to ensure compatibility with other connected components and overall system functionality.
Contact Input Signals
- The discrete input/output acquisition board in the PDIO pack performs advanced signal conditioning and level shifting, linking the terminal board inputs to the control logic. Initial signal conditioning occurs on the terminal board, while the acquisition board handles secondary conditioning. The input circuit for discrete inputs consists of a comparator with a configurable threshold, allowing for precise detection of input states.
- Each input signal is electrically isolated from the control logic using an opto-coupler and an isolated power supply, ensuring reliable signal transmission without direct electrical connections. However, the inputs themselves are not isolated from each other.
- Key features of each of the 24 inputs include:
- Filtering: Reduces signal noise for more accurate input detection.
- Hysteresis: Minimizes the effects of small fluctuations or noise around the threshold, enhancing stability in input signal interpretation.
Status LED Indicator: A yellow LED for each input provides a visual indication of input status:
- ON (Picked-Up): Indicates the input signal is active or picked-up.
- OFF (Dropped-Out): Shows the input signal is inactive.
- The 24 yellow status LEDs are arranged in a group at the bottom left of the PDIO pack, providing a clear visual reference for monitoring the state of each input at a glance.
WOC supports a large number of GE Speedtronic Mark VIe parts. Contact us if you require additional information or have a question.
Frequently Asked Questions
What is IS220PDIOH1A, REV G?
It is a Discrete Input/Output Module revision G version manufactured by General Electric.
What is the role of the contact input signals in the PDIO I/O pack?
The contact input signals allow the pack to receive and process discrete (on/off) signals from external devices, interfacing them with the system’s control logic for further processing and monitoring.
How does signal conditioning work in the pack?
Signal conditioning happens in two stages - the initial conditioning on the terminal board and the secondary conditioning on the discrete input/output acquisition board. This prepares the signals to be accurately interpreted by the control system.
What is the function of the comparator in the input circuit?
The comparator is used to detect discrete input signals by setting a variable threshold. This allows the system to accurately distinguish between active (picked-up) and inactive (dropped-out) input states.
Are the input signals isolated from each other?
No, while each input signal is isolated from the control logic through an optocoupler and an isolated power supply, the inputs are not isolated from one another.
