Product Description:

The 502-03642-03R3 analog input module is produced by Kollmorgen and belongs to the PIC900 Drives series. Installed inside the control section of a PIC900 rack, the board converts process signals into digital data for the drive’s internal processor. Its eight differential inputs accept 4–20 mA or voltage feedback from pressure, flow, or position transmitters so that closed-loop motor regulation can be synchronized with measured plant variables.

Signal precision is held to an accuracy of 0.2% FSR @ 25 °C when a channel is set for 4–20 mA, while voltage ranges hold 0.5% FSR under the same ambient condition. Input stages survive up to ±40 V of common-mode stress and operate without clipping at ±11 V. The card provides 8 isolated channels whose buffers present 1 MΩ of input impedance, minimizing loading on high-resistance transducers. Each sample is quantized with 12 bits of resolution, so small variations remain visible after scaling. A 250-ohm sense resistor establishes the 5 V span for current loops, and its 0.12 W rating keeps temperature rise within limits. Logic circuitry draws 112 mA from +15 V and 120 mA from +5 V. Field conductors terminate on a 40-pin card edge with screw blocks for accessible wiring.

Module layout complies with standard PIC900 mechanical slots. A depth of 213 mm, a height of 305 mm, and a slender 41 mm width allow adjacent drive cards to maintain cooling clearances inside the enclosure. Analog accuracy remains stable with a temperature coefficient of ±100 ppm/°C, so full-scale error drifts only slightly over normal cabinet temperature changes. Because the sensing resistors are limited to 0.12 W and the common-mode window is tightly controlled, no additional heat sinks or clamp networks are required at the terminal block. The field connector’s screw lugs accept shielded pairs, preserving 12-bit fidelity in electrically noisy motor rooms while the 1 MΩ front end keeps burden negligible on transmitter outputs.