PLCs, Power Supplies & Others

The Siemens 405-4DAC-2 converts digital PLC commands into analog voltage signals. This module belongs to the Siemens 405 series product family. You will find this output board in valve positioning and speed control applications. It drives actuators, recorders, and other analog field devices.

Manufacturer: Siemens
Series: 405 (TI405)
Category: Analog Output Module (4-Channel)

Physical Dimensions and Weight

The Siemens 405-4DAC-2 measures 11.5 inches in length. Its width reaches 1.6 inches for single-slot occupancy. The board thickness sits at 5.2 inches including components. This standard form factor fits into any 405 series rack. The total weight comes to approximately 0.35 kilograms.

Technical Specifications and Channel Configuration

This analog output module provides four isolated output channels. Each channel delivers 0 to 10V signals to field devices. The module converts each digital value with 12-bit resolution. Therefore, you get 4,095 discrete steps across the full range. The update time for all channels reaches 15 milliseconds.

Output Drive and Load Capacity

The Siemens 405-4DAC-2 drives up to 5 mA load current per channel. Each output can source 10V into a 2k ohm minimum load. The module includes short circuit protection on every channel. Consequently, a wiring fault on one output does not affect the others. You can connect multiple analog inputs without external amplifiers.

Energy Storage and Filtering

This output module includes a capacitor bank for signal smoothing. Each channel has 0.47 microfarads of storage capacitance. These capacitors reduce output ripple to less than 5mV peak-to-peak. Additionally, the board stores configuration data in non-volatile memory. This storage retains your settings during power cycles or module swaps.

Interface and Connectivity

The Siemens 405-4DAC-2 uses a 40-pin edge connector for backplane communication. A removable terminal block accepts field wiring for all four channels. Each channel provides two terminals for signal and return. LED indicators show active communication with the CPU. You can verify output status without measuring tools.

Component Layout and Construction

The Siemens 405-4DAC-2 contains 52 discrete components on a four-layer PCB. Key parts include four DAC chips and twelve precision resistors. An onboard microprocessor handles all digital-to-analog conversion tasks. All components meet industrial temperature ratings from 0°C to 60°C. This robust construction ensures reliable operation for many years.

Integration and Compatibility

Use the Siemens 405-4DAC-2 with any 405 series CPU module. It works alongside 405-4DAC-1 or 405-4ADC-1 I/O boards. This analog output supports all standard 405 series rack configurations. Order this original Siemens module to expand your analog output capacity today.

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