KNX Binary input, 8-gang-2128 REG

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SKU: 2128 REG
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rail mounting device, 4 rail units
8 inputs 12 ... 48 V AC/DC
Auxiliary voltage output DC 24 V (SELV) for polling floating contacts
with status indicator
ETS product family: Input
Product type: Binary input

Intended use
Polling of conventional switching or push-button contacts, window contacts etc. in KNX systems, for reporting of states, meter levels, operation of loads, etc.
Mounting on DIN rail according to EN 60715 in distribution box
Product characteristics
Status LED for each input
Detection of voltage levels and changes on the input
Transmitting of input status to the bus
Transmitting behaviour freely adjustable
Functions: switching, dimming, blinds up/down, brightness values, temperatures, calling up and saving light scenes, etc.
Inputs can be blocked separately
Connection of external AC or DC voltages
Auxiliary voltage output for polling floating contacts
No separate power supply required
Separate reference potentials for inputs
Pulse counter (firmware version V02 or higher), also suitable for S0 pulses


Technical data about Binary input, 8-gang, Rail mounting device, 4 rail units 2128 REG

KNX medium: TP 256
Rated voltage KNX: DC 21 ... 32 V SELV
Power consumption KNX: max. 350 mW
Stand-by: max. 200 mW
Connection, KNX: connection terminal
Ambient temperature: −5 ... +45 °C
Stora/transport temperature: −25 ... +70 °C
Rated voltage: AC/DC 12 ... 48 V
Signal level "0" signal: AC/DC −48 ... +2 V
Signal level "1" signal: AC/DC 8 ... 48 V
Input current at rated voltage:
Input current: 2 mA
Signal duration: min. 30 ms
Rated frequency AC signal: 30 ... 60 Hz
Number of contacts per input
NO contacts: unlimited
NC contacts: max. 20
Output voltage: DC 24 V SELV
Mounting width: 72 mm (4 rail units)
Stand-by power: max. 200 mW
Power loss: max. 1 W
Connection mode: screw terminals
single wire: 1 x 0.2 ... 4 mm²
stranded without ferrule: 1 x 0.34 ... 4 mm²
stranded with ferrule: 1 x 0.14 ... 2.5 mm²
Cable length: max. 100 m