At a Glance

The BMX DDI 3232 is fitted with a removable 40-pin terminal block for the connection of thirty-two input channels.

Input Circuit Diagram

The following diagram shows the circuit of a direct current input (positive logic).

The following diagram shows the circuit of a direct current input (negative logic).

Module Connection

The following diagrams show the connection of the module to the sensors:

Positive logic (sink)

Negative logic (source)

1 fast blow fuse of 0.5A

2 Sensor power supply (SPS) 12 VDC/24 VDC

The following diagram shows an example of mixed sink/source input:

1 fast blow fuse of 0.5A

2 Sensor power supply (SPS) 12 VDC/24 VDC

NOTE: In the above example, inputs of group A are in positive or negative logic (sink or source), whereas inputs of group B are only in positive logic (sink). SPS A and SPS B terminals are not connected and power supply monitoring should be disabled for both groups.

Sensor Power Outage

After a power sensor outage, if the Supply monitoring check box is not selected in the module configuration screen then the digital input can stay active.

To access the Supply monitoring check box, refer to chapter How to Modify the External Power Supply Error Monitoring Parameter.

After the sensor power outage, the I/O (red) LED of the module switches on and the last recorded position of the sensor is displayed by the input channel status LED's.