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021-1BB10 - Signal modules digital | Digital input modules

Order no.


TypeSM 021
Module ID000A 1F02

General information

Features2x DI (fast)
DC 24 V
Input filter time delay parameterizable 2 µs...4 ms

Current consumption/power loss

Current consumption from backplane bus100 mA
Power loss0.9 W

Technical data digital inputs

Number of inputs2
Cable length, shielded1000 m
Cable length, unshielded600 m
Rated load voltageDC 20.4...28.8 V
Current consumption from load voltage L+ (without load)12 mA
Rated valueDC 20.4...28.8 V
Input voltage for signal "0"DC 0...5 V
Input voltage for signal "1"DC 15...28.8 V
Input voltage hysteresis-
Signal logic inputSinking input
Frequency range-
Input resistance-
Input capacitance-
Input current for signal "1"3 mA
Connection of Two-Wire-BEROs possible
Max. permissible BERO quiescent current0.5 mA
Input delay of "0" to "1"parameterizable 2µs - 3ms
Input delay of "1" to "0"parameterizable 2µs - 3ms
Number of simultaneously utilizable inputs horizontal configuration2
Number of simultaneously utilizable inputs vertical configuration2
Input characteristic curveIEC 61131-2, type 1
Initial data size2 Bit

Status information, alarms, diagnostics

Status displaygreen LED per channel
Interruptsyes, parameterizable
Process alarmyes, parameterizable
Diagnostic interruptyes, parameterizable
Diagnostic functionsyes
Diagnostics information read-outpossible
Module stategreen LED
Module error displayred LED
Channel error displaynone


Between channels-
Between channels of groups to-
Between channels and backplane bus
Insulation tested withDC 500 V


Safety protocol-
Safety requirements-
Secure user address-
Two channels-
Test pulse outputs-


Input bytes1
Output bytes0
Parameter bytes9
Diagnostic bytes20


MaterialPPE / PPE GF10
MountingProfile rail 35 mm

Mechanical data

Dimensions (WxHxD)12.9 mm x 109 mm x 76.5 mm
Net weight58 g
Weight including accessories58 g
Gross weight73 g

Environmental conditions

Operating temperature0 °C to 60 °C
Storage temperature-25 °C to 70 °C


UL certificationyes
KC certificationyes