The Siemens 3RS7005-1KE00 is a SIRIUS multi-range signal converter — an active, switchable module that takes an analog input (0...10 V, 0...20 mA, or 4...20 mA) and converts it to a frequency output (0...50 Hz, 0...100 Hz, 0...1 kHz, or 0...10 kHz). This is the part you spec when a PLC analog output needs to drive a frequency-sensitive load — a small VFD reference, a pulse-input counter, or a rate meter. The 0.1 % relative metering precision and 0.05 % linearity deviation mean the output tracks the input tightly; the 0.015 %/°C temperature drift keeps it stable across a panel that warms up over a shift.
Snap-on mounting onto standard DIN rail. At 6.2 mm wide and 93 mm tall, it takes up minimal real estate — you can pack a dozen of these in the space of a single contactor. Depth of 72.5 mm leaves clearance for wiring in a standard 80 mm deep enclosure. The IP20 protection class means it's for inside the panel only, not for washdown or outdoor.
The 0.29 W consumed active power is negligible — no thermal derating needed even in a densely packed row of converters. The AC/DC input voltage type (30 V nominal) means it works on either supply without a jumper change. Galvanic isolation between input and output is present, so you can break ground loops between a 4-20 mA transmitter and a PLC input card. The 1-channel design keeps it simple: one signal in, one frequency out, no configuration software needed.