Product Description:

The R-IB IL AI 8/IS-PAC analog input interface module is manufactured by Bosch Rexroth Indramat and belongs to the R-IB Interface Modules series. It is intended to collect low-level process signals from field transmitters and forward the digitized data to a higher-level controller through the local bus. This gives distributed I/O capability to industrial automation systems. It also allows analog measurements to be captured near the sensing point, reducing long signal runs between field devices and the main control cabinet.

Physical and signal-conditioning parameters govern cabinet layout and measurement fidelity. An enclosure rated at IP20 protects the electronics against finger contact and limits dust ingress for indoor panels. The slice occupies only 48.8 mm of horizontal DIN-rail space while standing 136.8 mm tall, so eight channels can be added without significant width growth. Each input presents an impedance of 25 Ω, which matches typical two-wire loop sources and minimizes loading errors. The analog front end transmits signal components up to 3.5 kHz, which is adequate for most temperature, pressure, or position sensors that do not exceed low audio frequencies. Eight non-multiplexed channels share these characteristics, allowing simultaneous acquisition of multiple process variables.

Communication and auxiliary power specifications determine how the slice integrates with the bus coupler and sensors. The local internal bus exchanges data at 500 kbps, so channel values update quickly enough for medium-speed control loops. Logic circuitry is powered from a backplane feed of 7.5 V DC, isolating sensitive converter stages from higher external voltages. Connected transducers receive a field supply of 24 V DC, delivered directly at the terminal block, and each channel can source up to 20 mA to drive two-wire current loops, active potentiometers, or other low-power sensors without separate power wiring.