GE IS200ISBDG1A IS200ISBDG1AAA | Insync Delay Board

Core Function and System Role

The GE IS200ISBDG1A provides programmable signal delays for Mark VI systems. Specifically, this board synchronizes input signals with turbine timing requirements. Moreover, it filters out transient noise from field contacts. The IS200ISBDG1AAA variant includes extended delay ranges for slow process signals.

Technical Specifications Overview

This insync delay board features eight independent programmable delay channels. Each channel accepts 24 Vdc input signals. Furthermore, the board provides adjustable delay from 1 millisecond to 10 seconds.

Parameter	Specification
Part Number	IS200ISBDG1A / IS200ISBDG1AAA
Type	Insync Delay Board / Signal Timing Module
Delay Channels	8 Channels
Input Voltage	24 Vdc ±20%
Delay Range	1 ms to 10 s (Programmable)
Delay Accuracy	±1% of Setting
Output Type	24 Vdc, Open Collector
Output Current	50 mA per Channel
Resolution	1 ms Steps
Status Indicators	8 Green LEDs
Power Supply	24 Vdc ±15%
Connector Types	2 x 50-pin D-sub, 2 x Terminal Blocks
Dimensions (W x H x D)	185 x 110 x 25 mm
Weight	0.55 kg
Onboard Energy Storage	4 x 100 µF, 35V Capacitors

Connector Layout and Component Count

The board uses two terminal blocks for input and output wiring. For instance, block TB1 accepts 24 Vdc input signals from field devices. Meanwhile, block TB2 provides delayed output signals to the controller. Two 50-pin D-sub connectors allow programming and monitoring. The IS200ISBDG1AAA adds six additional timing capacitors for extended ranges.

Energy Storage and Signal Integrity

This delay board includes local capacitance for stable timing. Specifically, four 100 µF capacitors filter the 24 Vdc supply. Therefore, the board maintains accurate delays during power fluctuations. Additionally, onboard LED indicators show each channel’s status. For example, a green LED illuminates when an input is active. A flashing LED indicates the delay period is in progress.

Diagnostic Features and Fault Detection

The board continuously monitors each channel for timing errors. Consequently, it detects stuck inputs or output faults immediately. Moreover, the GE IS200ISBDG1A IS200ISBDG1AAA includes watchdog timers for each channel. This feature prevents outputs from remaining active indefinitely. An onboard status register reports all channel health to the main controller.

Maintenance and Hot Replacement

You can replace this delay board without powering down the turbine. Thus, mean time to repair remains under ten minutes. The board stores its delay settings in non-volatile memory. Therefore, configurations persist through power cycles and board replacements.

Industrial Applications

This insync delay board works inside GE Mark VI control cabinets. For reliable GE signal timing, the IS200ISBDG1A and IS200ISBDG1AAA deliver exceptional performance. They provide precise delay control for steam and gas turbine sequencing and protection circuits.