Configured for 24 V DC logic acquisition in Modicon X80 PLC systems, the BMXDDI1602H, also cataloged as the BMXDDI1602 discrete input module, provides direct physical execution of isolated sinking input signal detection for industrial control backplanes.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Brand | Schneider Electric |
| Origin | France |
| Weight | 0.115 kg |
| Dimensions | 25 mm x 102 mm x 102 mm |
| Operating Temperature | -40 to 70 degC |
| Power Consumption | 2.5 W |
| Input Voltage | 24 V DC (Logic Positive) |
| Input Type | Current Sink (Positive Logic) |
| Number of Inputs | 16 (Isolated) |
| Input Current | 3.5 mA |
| Input Impedance | 6800 Ohm |
| Response Time | 4 ms typical / 7 ms max |
| MTBF | 775000 Hours |
Backplane Bus Communication and Firmware Flash Compatibility
The module interfaces with the X80 backplane via a high-speed bus connector, requiring firmware flash compatibility validation against the host processor firmware revision. Channel density scaling is managed through the Unity Pro software configuration, where input paralleling must be enabled to aggregate multiple discrete points into a single logical status word. The module consumes 76 mA at 3.3 V DC from the backplane power budget.
Frequently Asked Questions
Q: Does the BMXDDI1602H support hot-swapping on a live backplane?
A: No. Power must be removed from the X80 rack before inserting or removing the module to prevent backplane bus communication errors and potential damage to the connector pins.
Q: What is the required sensor power supply range for operation at maximum ambient temperature?
A: At 70 degC, the sensor power supply must be maintained between 21.1 V DC and 26.4 V DC to guarantee state 1 current levels greater than 2 mA.
Q: Are the input channels galvanically isolated from each other?
A: Yes. Each of the 16 inputs is electrically isolated, allowing connection to different reference potentials within the 24 V DC sourcing network.
Field Installation Guidelines
Mount the module on a standard 35 mm DIN rail within the X80 chassis. Ensure proper seating by verifying the locking tab engagement. Use ferrules on all field wiring terminations to prevent strand shorting. For severe environment applications, confirm that the enclosure maintains an IP20 rating and that external 0.5 A fast-blow fuses are installed on each input group to protect against overcurrent conditions. Ground the shield of incoming cables to the chassis ground point at a single location to mitigate EMI.
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