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021-1DF00 - Signal modules digital | Digital input modules

Order no.


TypeSM 021
Module ID0012 1F41

General information

Features8x DI
DC 24 V
Diagnostic of wiring errors

Current consumption/power loss

Current consumption from backplane bus60 mA
Power loss1.1 W

Technical data digital inputs

Number of inputs8
Cable length, shielded1000 m
Cable length, unshielded600 m
Rated load voltage-
Current consumption from load voltage L+ (without load)-
Rated valueDC 20.4...28.8 V
Input voltage for signal "0"DC 0...5 V
Input voltage for signal "1"DC 10,8...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 current1.5 mA
Input delay of "0" to "1"parameterizable 100µs - 20ms
Input delay of "1" to "0"parameterizable 100µs - 20ms
Number of simultaneously utilizable inputs horizontal configuration8
Number of simultaneously utilizable inputs vertical configuration8
Input characteristic curveIEC 61131-2, type 3
Initial data size8 Bit

Status information, alarms, diagnostics

Status displaygreen LED per channel
Process alarmno
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 bytes12
Diagnostic bytes20


MaterialPPE / PPE GF10
MountingProfile rail 35 mm

Mechanical data

Dimensions (WxHxD)12.9 mm x 109 mm x 76.5 mm
Net weight57 g
Weight including accessories57 g
Gross weight71 g

Environmental conditions

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


UL certificationyes
KC certificationyes