Month: May 2025

About the IS220PDIOH1B

The IS220PDIOH1B unit is a Discrete I/O Pack part of the General Electric Speedtronic Mark VI/VIe/VIeS gas turbine control modules with accessory combinations approved for use in hazardous locations. When the IS220PDIOH1B model is being operated in the chosen system, it is used with several terminal boards; some of the terminal boards used are labeled as follows:

ISx0yTDBSH2A

ISx0yTDBSH8A

ISx0yTDBTH2A

ISx0yTDBTH8A

These terminal boards extend the PDIO packs functionality, as the previous PDIO pack can only work with two accessory terminal boards. The terminal boards are labeled as Intrinsically Safe Apparatus Relay Contact terminal boards.

This unit contains two Ethernet ports, a local processor, and a data acquisition board for use within the GE Mark VI Speedtronic Series. The electronics technology for the Mark VIe I/O packs introduced in 2004 is obsolete. The front panel of the IS220PDIOH1B includes LED indicators for both ethernet ports for the unit’s power and an “attn” LED. Additional LEDs are related to relay connections.

The IS220PDIOH1B has a minimum voltage rating of 27.4 VDC, while the nominal rating is 28.0 VDC. The unit and its associated terminal boards have specific field wiring connection instructions that must be followed, including wire size and screw torque.

There are twenty-four field terminals when using the TDBS or TDBT boards on the IS220PDIOH1B. All of the positive terminals are labeled as contact-wetting inputs. Each of the terminals on the model differs between negative and positive terminals. For more information on the terminals, refer to the last page of the data sheet above.

Features

The VMIVME-1182 features are outlined below.

• 64 optically isolated inputs

• Multiple-functions available per channel:– SOE reporting– Pulse accumulation reporting– Time tag reporting– Programmable debounce times

• Available in 5 to 250VDC or 4 to 240VAC options

• Available in contact sensing or voltage sensing options

• 1500VDC or 1100VRMS channel-to-channel and channel-to-VME isolation (1minute)

• Pulse accumulation for up to 65.535 pulses per channel

• SOE monitoring on a channel-by-channel basis

• Debounce time software controlled on a channel-by-channel basis

• COS monitoring software controlled on a channel-by-channel basis

• A24/A16 addressing capability

• Supervisory bus access, nonprivileged bus access, or both

• Release-On-Acknowledge (ROAK) interrupts on all VME levels

The board is initialized with the following default conditions:

• Fail LED is ON

• All interrupts are disabled

• All flags are cleared

• Test mode is enabled

• Interrupt Vector Register (IVR) is cleared

• COS registers are cleared

• Pulse Accumulation Interrupt (PAI) registers are cleared

• Input Debounce/Select Registers (DSRs) are cleared

• Input Pulse Accumulation Count (PAC) registers are cleared

• Time tag clock is set to zero (0) and stopped

• SOE maximum count is cleared

• SOE count is cleared

• SOE buffers contain test data, if self-test fails. If self-test passes, then the SOE buffers are cleared.

• Self-Test Complete bit is set in the CSR

FEATURES:

Topology: ARCNET supports both bus and star topologies. In a bus topology, all devices share a common communication medium, while in a star topology, each device is connected to a central hub.

Data Transfer Rate: ARCNET typically operates at speeds of 2.5 Mbps (Megabits per second) or 10 Mbps, depending on the version and implementation. It might not be as fast as some modern LAN technologies but was suitable for its time.

Medium Access Control: ARCNET uses a token-passing protocol for medium access control. A token is passed from one node to another, allowing the node holding the token to transmit data.

Cabling: The cabling used in ARCNET can vary, but it commonly employs coaxial cables. The type of cable and connectors used may depend on the specific implementation and version of ARCNET.

Network Size: ARCNET networks can support a limited number of nodes, typically ranging from a dozen to a few dozen devices. This makes it suitable for smaller networks.

Addressing: ARCNET devices are assigned unique addresses to enable communication within the network. These addresses are used to identify the source and destination of data packets.

Reliability: ARCNET is known for its deterministic and predictable behavior, making it suitable for real-time applications. The token-passing protocol helps ensure controlled access to the network.

Protocol Stack: ARCNET has its protocol stack, which includes the physical layer, data link layer, and a portion of the network layer. It is not directly compatible with the more common TCP/IP protocol stack.

DS200IIBDG1A Board Replacement

The board is mounted in the drive’s printed circuit board cabinet. Since the cabinet contains multiple boards and multiple cables routed throughout the cabinet, it is critical to follow some basic guidelines to prevent board damage.

When inserting or removing boards, avoid touching other boards in the cabinet and breaking components.

In some cases, you may need to remove a board to access a board that needs to be replaced.

Install the board back in the same position it was in when you removed it. Then reconnect all cables.

The board has multiple connectors and you must ensure that the cables are connected to the same connectors when installing the replacement board.

To reconnect them to the same connectors, inspect the defective boards and make a note of the connector identifier that indicates the connector to which the cables have been connected.

Then, make labels and attach them to the cables to indicate where the devices should be connected on the new board.

The board contains a 32-pin ribbon cable connector, and you must consider how the ribbon cable will be disconnected and reconnected during the replacement process.

If any of the thin wires are cut, the signal it carries will not be sent to or received by the board.

Two tabs on either side of the ribbon cable hold the connector in place.

To remove the ribbon cable, grasp the connector on both sides while releasing the two tabs. Then, remove the connector from the board.

In addition, the board contains one or more jumpers that configure the board to handle drive data in a particular way.

Other jumpers are set at the factory for testing purposes only. The board’s documentation identifies the jumpers and describes the jumper settings and how they affect the board’s behaviour.