The IS420YDOAS1B belongs to the GE Mark VIeS series. This Discrete Output I/O Pack provides an electrical interface between two Ethernet networks and a discrete output terminal board. It includes a BPPC processor board and surface-mount technology. You can use this IS420YDOAS1B in simplex or TMR configurations. Its compact design delivers fast 6 ms response for turbine control applications.
The IS420YDOAS1B controls up to twelve relays. Each output includes dedicated coil monitoring. The pack also accepts terminal board-specific feedback. All inputs reach the pack through dual RJ-45 Ethernet connectors. A three-pin power input supplies 28 V dc. Outputs connect via a DC-37 pin connector directly to the terminal board.
Power consumption is typical for Mark VIeS I/O packs. The IS420YDOAS1B uses a BPPC processor board. This processor supports firmware V05.01 or later. ControlST Software Suite must be V06.01 or later. The pack operates with either simplex or TMR redundancy.
Twelve yellow LEDs provide visual output status. Each yellow LED indicates that the command is energizing its relay. Additionally, BPPx processor LEDs show system diagnostics. The ATTN LED displays red or green in solid or flashing patterns.
For example, a green ATTN LED flashing at 2 Hz with 50% duty cycle indicates normal operation. Two 4 Hz pulses every four seconds mean the application is online and functioning correctly. These visual diagnostics simplify troubleshooting during turbine operation.
This module operates within -40 to 158°F (-40 to 70°C). Its dimensions are H 3.25 in x W 1.65 in x D 4.78 in. The IS420YDOAS1B uses surface-mount technology for reliable performance. Response time is 6 ms from command to output change. The unit is manufactured in the USA.
First, securely mount the compatible discrete output terminal board. Next, insert one simplex IS420YDOAS1B or three TMR packs directly into the terminal board connectors. Then, use the threaded studs next to the Ethernet ports to secure the pack. Ensure no right-angle force applies to the DC-37 connector.
After mechanical fixing, connect one or two Ethernet cables. The pack works with either ENET1 or ENET2. For dual connections, connect ENET1 to the R controller network. Finally, plug in the 28 V dc power connector. The IS420YDOAS1B includes soft-start capability for safe power connection.
This I/O pack works only with TMR or simplex applications. In TMR mode, you must use three identical packs. Do not mix IS420YDOAS1B with other versions on the same terminal board. The pack supports firmware V05.01 and later. It also runs on ControlST V06.01 and later.
Several diagnostic alarms may appear during operation. Alarm five indicates the I/O pack is in remote I/O mode. This usually means hardware failure or invalid module configuration. To fix this error, replace the I/O pack entirely. Alternatively, rebuild the system and reconfigure the IS420YDOAS1B.
Other alarms include code two and code three. Each alarm has specific causes and solutions. Consult manual GEH-6855 for complete diagnostic information. The IS420YDOAS1B includes a protective outer chassis around its interior circuitry. This design enhances durability in harsh environments.
This module combines fast response, visual diagnostics, and rugged construction. Its twelve relay outputs with coil monitoring suit turbine discrete control applications. The 6 ms response time ensures timely actuator commands. For wind, gas, or steam turbine control, the IS420YDOAS1B is a reliable choice.
IS420YDOAS1B Discrete Output I/O Pack (1 unit)
DC-37 pin connector cover (1 piece)
3-pin power connector (1 piece)
Quick start guide (1 copy)
Note: No certificates or warranty documents are included.
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1. Can I use the IS420YDOAS1B with ControlST V05.00?
No. The IS420YDOAS1B requires ControlST V06.01 or later. Firmware must be V05.01 or above.
2. What is the output response time of this module?
The response time is 6 ms from command to relay energization. This fast speed suits real-time turbine control.
3. Does the IS420YDOAS1B support hot-swapping?
Yes. The soft-start circuit controls inrush current. You can connect or disconnect power without system shutdown.
4. What do the yellow LEDs indicate?
Each yellow LED shows that its corresponding output command is energizing the relay. Twelve yellow LEDs cover all twelve outputs.
5. How do I fix alarm five on the IS420YDOAS1B?
Alarm five means the pack is in remote I/O mode. Replace the I/O pack or rebuild the system configuration. Also check for invalid module settings.
| Brand Name | GE |
| Model No. | IS420YDOAS1B |
| Product Type | Discrete Output I/O Pack |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
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