IC694MDL742 DC Positive Logic Output Module: Reliable Solution with Electronic Short Circuit Protection (ESCP)

The IC694MDL742 is a 12/24 Volt DC positive logic output module with a capacity of 1 Amp per point and features Electronic Short Circuit Protection (ESCP). It provides 16 output points, divided into two groups of eight. Each group has a common power output terminal. With its positive logic characteristics, this module sources current to the loads from the user-supplied common or positive power bus. Output devices are connected between the negative power bus and the module output terminals. This module is compatible with a wide range of load devices, such as motor starters, solenoids, and indicators. Power to operate the field devices must be supplied by the user.

Each output point has an individual numbered LED to display its ON/OFF status. The module does not include fuses. The red LED (F) indicates when the electronic short circuit protection is triggered. The blue bands on the label indicate that the MDL742 is a low-voltage module. It can be installed in any I/O slot within an RX3i system.
Electronic Short Circuit Protection

The MDL742 module features two Electronic Short Circuit Protection circuits. The first circuit protects points 1 through 8, while the second circuit protects points 9 through 16. The module electronically monitors the common signal for each group. If a short circuit occurs, the module turns off the output points in that group and turns on the red LED (F). The point LEDs remain ON. The protection does not prevent individual outputs from exceeding their ratings but protects the module in case of a short-circuited load. Electronic Short Circuit Protection is reset by cycling the 12/24 VDC user power to the module.
Technical Specifications and Performance

    Rated Voltage: 12/24 Volts DC
    Output Voltage Range: 12 to 24 Volts DC (+20%, -15%)
    Number of Outputs: 16 (two groups of eight outputs each)
    Isolation: 250 Volts AC continuous, tested up to 1500 Volts AC
    Output Current: Maximum 1 Amp per point
    Maximum Current per Group: 4 Amps @ 50°C, 3 Amps @ 60°C
    Inrush Current Capacity: 5.2 Amps for 10 ms
    Power Consumption: 130 mA (with all outputs on) from the 5-volt bus on the backplane
    Output Voltage Drop: 1.2 Volts maximum
    Off-State Leakage Current: 1 mA maximum
    On and Off Response Time: Maximum 2 ms

Wiring Connections

The terminal connections for each output are as follows:

    Terminal 1: DC +
    Terminals 2-9: Outputs 1 to 8
    Terminal 10: Common return for outputs 1-8
    Terminal 11: DC +
    Terminals 12-19: Outputs 9 to 16
    Terminal 20: Common return for outputs 9-16

Recommendations and Advice

The IC694MDL742 module provides reliable and safe control in industrial automation systems with its positive logic and Electronic Short Circuit Protection (ESCP) features. It is ideal for controlling motor starters, solenoids, and indicator devices in a wide range of applications. The Electronic Short Circuit Protection enhances safety by detecting short circuits and preventing damage to the module. Since the module does not include internal fuses, external protection is recommended.

Overall, the IC694MDL742 is a robust and reliable solution for low-voltage applications, providing enhanced safety and long-term performance.

>> IC694MDL742 Output modules User manual (pdf)

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