The GE IS200AEADH4A IS200AEADH4ADA input terminal board connects digital field devices to Mark VI systems. This board reads status signals from sensors, switches, and relay contacts. You will find this input board in Speedtronic Mark VI turbine control cabinets. Its high-density design packs twenty-four inputs into a single slot.
Input Architecture
This input terminal board provides twenty-four digital input channels. Consequently, it monitors many field devices without multiple boards. The GE IS200AEADH4A IS200AEADH4ADA accepts both dry contacts and voltage-driven signals. Moreover, each channel includes an LED status indicator. You can quickly identify active inputs without external tools.
Technical Specifications
| Parameter | Value |
|---|---|
| Input Channels | 24, opto-isolated |
| Input Type | Dry contact or 24V DC sourcing |
| Input Voltage Range | 10-30V DC (24V DC nominal) |
| Input Current | 5 mA typical at 24V DC |
| Response Time | 5 ms maximum (on to off, off to on) |
| Contact Wetting Current | 2 mA (for dry contact mode) |
| Dimensions | 230mm x 170mm x 25mm |
| Weight | 0.55 kg (1.21 lbs) |
| PCB Layers | 4 |
| Onboard Components | 24 optocouplers, 24 LEDs, 24 debounce filters |
| Connector Count | 3 (field input, backplane, status) |
| Status Indicators | 24 LEDs (one per channel, input active) |
| Energy Storage | 470 µF (input filtering capacitance) |
| Isolation Voltage | 1500V (field side to logic side) |
| Input-to-Input Isolation | None (common reference) |
| Operating Temperature | 0°C to +50°C |
| Storage Temperature | -20°C to +70°C |
Input Filtering and Status Indication
The unit includes debounce filters on all twenty-four input channels. Therefore, it rejects contact bounce from mechanical switches and relays. This board replaces the IS200AEADH4ADA version without any configuration changes. Simply remove the old board and install this one. GE designed this input board for single-slot installation. Hence, it fits directly into existing Mark VI rack positions.
Four PCB layers separate field input traces from logic circuits effectively. Three connectors handle all field, backplane, and status signals. The GE IS200AEADH4A IS200AEADH4ADA includes software-selectable filtering on each channel. Accordingly, you can adjust the response time for different switch types. Twenty-four LEDs provide immediate visual feedback for every channel.
Input Configuration and Installation Guide
You can configure each channel for dry contact or voltage input modes. Jumper settings on the board select the input type per channel. The GE IS200AEADH4A IS200AEADH4ADA works with limit switches, push buttons, and relay contacts. Always use shielded cable for input wiring longer than 30 meters. Proper grounding of the common reference prevents false triggering.
The board supplies 2 mA wetting current for dry contact cleaning. This current prevents oxide buildup on unused relay contacts. The GE IS200AEADH4A IS200AEADH4ADA works with all GE Mark VI control systems. Installation requires only a screwdriver for terminal connections. This board operates reliably in non-condensing environments only.
Details
| Weight | 0.1 kg |
|---|---|
| Dimensions | 25 × 108 × 127 mm |
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