M.1301.4145 Danaher
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The Danaher M.1301.4145 is part of the Block IO Analog Modules series and features 4 input channels with a ±10 V input voltage range and 14-bit input resolution. It provides 4 output channels with a ±10 V output voltage range, 16-bit output resolution, and an output accuracy of ±0.375% FSR. The module has a sample rate of 800 microseconds and a module current draw of 120 mA.
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Product Description:
The M.1301.4145 is an analog block I/O module produced by Danaher for the Block IO Analog Modules series. It combines four voltage-sensing inputs and four voltage outputs in a compact slice that plugs directly into distributed control racks. In an automation cell, it converts sensor signals into digital words and returns calculated commands to actuators, allowing a PLC to monitor and adjust process variables without separate signal conditioners.
The input section provides four differential channels that accept ±10 V signals with an input resolution of 14 bits. Each conversion maintains an accuracy of ±0.25% FSR, so the numerical error stays within one-quarter of a percent of the full-scale range. Unwanted broadband noise is limited by a common-mode filter with a cutoff of 3 dB at 10 kHz, while line-frequency and machinery ripple is further suppressed by a differential filter with a cutoff of 3 dB at 475 Hz. A complete sample of all inputs is captured every 800 µs, ensuring that slow thermal or pressure sensor signals are digitized without aliasing. The ±10 V span combines with the 14-bit code width to provide 1.22 mV per count, matching the resolution needed for typical transducer outputs in motion or tension control loops.
The output section has four voltage channels that drive ±10 V with a resolution of 16 bits, providing a 305 µV step size for precise actuator positioning. Each channel maintains an accuracy of ±0.375% FSR and can source or sink up to ±10 mA for analog valves or reference inputs. At power-up or when network scanning stops, the outputs default to 0 V ±100 mV so downstream equipment remains inactive. During normal operation, the outputs refresh every 200 µs, keeping control loops responsive. The module draws 120 mA from the backplane supply to power its converters and line drivers. Its four-input, four-output architecture supports installations that require equal input and output channel counts.
