Description
Technical Parameters
Product Introduction
The Discrete Input (IS420YDIAS1B) I/O pack provides the electrical interface between one or two I/O Ethernet networks and a discrete input terminal board. The YDIA contains a common processor board and an acquisition board specific to the discrete input function. The YDIA I/O pack accepts up to 24 contact inputs and terminal board specific feedback signals, and supports three different voltage levels.
Technical Specifications
|
Manufacture |
General Electric(GE) |
|
Model |
IS420YDIAS1B |
| Part Number | IS420YDIAS1B |
|
Description |
Mark VIeS YDIA Discrete Input Pack
|
|
Origin |
USA |
|
Dimension |
22*13*10cm |
|
Weight |
0.55kg |
Product Details
System input to the pack is through dual RJ-45 Ethernet connectors and a three-pin power input. Discrete signal input is through a DC-37 pin connector that connects directly with the associated terminal board connector. Visual diagnostics are provided through indicator LEDs.
The YDIA I/O pack contains an internal processor board. The following table lists the available versions of the YDIA.
|
I/O Pack
|
Processor Board
|
Compatible (Supported) Firmware
|
ControlST Software Suite Versions
|
|
IS420YDIAS1B
|
BPPC
|
V05.01 and later
|
Supported in V06.01 and later versions
|
The YDIA I/O pack is compatible with seven discrete contact input terminal boards, including the TBCI and STCI boards.
|
Terminal Board
|
Processor Board
|
I/O Pack Redundancy
|
||
|
Simplex
|
Dual
|
TMR
|
||
|
TBCIS2C, S3C
|
TMR Contact input terminal board with group isolation
|
Yes
|
Yes
|
Yes
|
|
STCIS2A, S4A
|
Simplex Contact input terminal board
|
Yes
|
No
|
No
|
I/O pack redundancy refers to the number of I/O packs used in a signal path, as follows:
• Simplex uses one I/O pack.
• Dual uses two I/O packs.
• TMR uses three I/O packs.
YDIA I/O pack Input Signals：
The discrete input acquisition board provides the second stage of signal conditioning and level shifting to interface the terminal board inputs to the control logic. Initial signal conditioning is provided on the terminal board. The discrete input acquisition input circuit is a comparator with a variable threshold. Each input is isolated from the control logic through an opto-coupler and an isolated power supply. The inputs are not isolated from each other. Each of the twenty-four inputs has filtering, hysteresis, and a yellow status LED, which indicates when an input is picked up. The LED will be OFF when the input is dropped-out.
YDIA I/O pack Variable Threshold：
The input threshold is derived from the contact wetting voltage input terminal. In most applications this voltage is scaled to provide a 50% input threshold. This threshold is clamped to 13% to prevent an indeterminate state if the contact wetting voltage drops to zero. If the contact wetting voltage drops below 40% of the nominal voltage, the under-voltage detector annunciates this condition to the control. A special test mode is provided to force the inputs from the control pack. Every four seconds, the threshold is pulsed high and then low and the response of the opto-couplers is checked. Non-responding inputs are alarmed.
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