The IC693MDL645 is a 24 Volt DC Positive/Negative Logic Input module for the Series 90-30 PLC system. It provides 16 input points in one group, all sharing a common power input terminal. Here’s a simple yet detailed overview for technicians:

How It Works:

    The module can operate in either positive logic or negative logic mode.
        Positive logic means it sinks current from input devices to the common or negative bus.
        Negative logic means it sources current through the input device to the common or positive bus.
    When current flows into one of the input points, it results in a logic 1 in the input status table (%I). The field devices can be powered by the user or by an isolated +24V DC supply from the module.

LED Indicators:

    There are 16 green LEDs split across two rows (A1-A8 for points 1-8, B1-B8 for points 9-16). These LEDs indicate whether each input is ON or OFF.
    The blue color-coded insert on the left edge of the module marks it as a low-voltage module.

Installation:

    It can be installed in any I/O slot of a 5 or 10-slot baseplate in a Series 90-30 PLC system.

Key Technical Details:

    Rated Voltage: 24V DC
    Input Voltage Range: 0 to 30V DC
    Number of Inputs: 16 (in one group with a common terminal)
    Isolation: 1500V between the field and logic sides
    Input Current: 7 mA typical at rated voltage
    On-State Voltage: 11.5V to 30V DC
    Off-State Voltage: 0 to 5V DC
    On/Off Response Time: 7 ms typical
    Power Consumption:
        80 mA (from the 5V bus when all inputs are ON)
        125 mA (from the isolated 24V bus or user-supplied power)

Wiring and Connections:

    The module's wiring diagram shows how to connect input devices and a power source. Both positive and negative logic wiring setups are supported.

Temperature and Input Load:

    The number of active inputs decreases as the ambient temperature rises. For instance, at 50°C, a maximum of 8 inputs can be ON with a 30V power supply.

This module is ideal for applications that require multiple inputs while maintaining flexibility between positive and negative logic operations. It's also well-suited for controlling devices like pushbuttons, limit switches, and proximity sensors in 24V DC systems.

>> IC693MDL645 User manual (pdf)

++ Other 90-30 PLC modules

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