Input channels: 2 channels

Nominal voltage: 24 VDC

Voltage range: 20.4 to 28.8 VDC

Logic 1 threshold: 15 VDC minimum

Logic 0 threshold: 5 VDC maximum

Input current: 3 mA per channel

Input filter: approximately 3 ms, software-configurable on supported CPUs

Galvanic isolation: 500 V between field side and system bus

Backplane power: 30 to 50 mA at 5 VDC

Status indication: 2 green LEDs, one per channel

Terminals: screw or spring-cage depending on variant

Compliance: IEC 61131-2 Type 1 and Type 3 input characteristics

Per-channel diagnostic LED

Short-circuit-protected input circuit

Hot-pluggable operation in DIAS rack configuration

Galvanic isolation between field wiring and bus

Software-adjustable input filtering for contact debounce

Machine control panels

Pushbutton and selector switch monitoring

Proximity sensor and limit-switch acquisition

Small DIAS remote I/O stations

Test benches and packaging machines

3 ms standard filter stabilizes mechanical contact signals

500 V isolation separates field faults from backplane logic

Green LED per channel provides immediate wiring and signal verification

30 to 50 mA backplane current defines rack power budgeting

Housing: polyamide PA6-GF engineering plastic

Terminals: tinned copper screw or spring-cage contacts

Internal circuit: insulated multilayer PCB with optoisolation components

Compact DIAS terminal design

35 mm top-hat DIN-rail mounting

Typical width 12.5 mm

Field terminals on front or side depending on variant

Integrated DIAS bus connection for power and data

A field device applies 24 VDC to the input terminal. The input circuit limits current, filters contact bounce and isolates the signal through a 500 V barrier. The conditioned logic state is transmitted over the DIAS bus to the CPU. The CPU