IS420YDOAS1B

About the IS420YDOAS1B

The IS420YDOAS1B is a Discrete Output I/O Pack that was manufactured by GE Energy. This module was designed to be used within the Mark VIeS Series. 

Hardware Tips and Specifications

The Discrete Output I/O Pack IS420YDOAS1B can provide:

• electrical interfaces between up to two Ethernet input-output networks
• a discrete output terminal board
• diagnostic LEDs; typically the twelve LEDs will be yellow to provide an indication for each output that command is energizing the relay

This pack can control up to twelve relays and will accept terminal board-specific feedback. All of the inputs to the I/O pack will be sent through dual Ethernet RJ454 connectors as well as a  three-pin power input. A DC37 pin connector is used for the outputs which will connect directly to the associated terminal board connectors. If visual diagnostics are needed they will be provided through the LED indicators on the front of the pack. 

IS420YDOAS1B Diagnostic/Revision Information

The BPPC processor LEDs will be used to indicate the diagnostics needed as well. There is an ATTN LED that will be red or green and either solid or flashing. Some of the patterns for the green ATTN LED are 2 Hz 50% and two 4 HZ pulses every four seconds; the latter of the patterns indicates that the application is online and functioning as needed. 

There are a variety of common diagnostic alarms that can pop up during the operation of the IS420YDOAS1B pack, some examples are two, three, and five. All of these alarms have different causes and solutions. The description, causes, and potential solutions for alarm five are the I/O pack being in remote I/O mode. Some causes for this are that the hardware has failed and the module configuration of the I/O pack might be invalid. To fix these errors replace the I/O pack or module entirely or rebuild the system and reconfigure the I/O pack.