SM 021 - Digital input
8x DI
DC 24 V

The SM 021 digital input module (021-1BF00) is an ideal solution for capturing digital input signals in automation systems. It provides 8 digital inputs (DI) with a nominal voltage of DC 24 V, making it perfect for applications where fast and reliable signal acquisition is crucial. The module features a green status LED for each channel to display the state of each input, as well as a green LED for module status and a red LED to indicate module errors. The ability to connect two-wire BEROs adds flexibility to its application. Its compact design allows for easy installation in both horizontal and vertical configurations.

Technical Data:

Order No.:

• 021-1BF00

Type:

• SM 021 - Digital Input

Module ID:

• 0005 9FC1

General Information:

• Note:-

Features:

• 8x DI
• DC 24 V

Current Consumption/Power Loss:

• Current consumption from backplane bus:65 mA
• Power loss:0.9 W

Technical Data Digital Inputs:

• Number of inputs:8
• Cable length, shielded:1000 m
• Cable length, unshielded:600 m
• Rated load voltage:-
• Current consumption from load voltage L+ (without load):-
• Rated value DC:20.4...28.8 V
• Input voltage for signal "0 cm ( 0 inch ):DC 0...5 V
• Input voltage for signal "2,5 cm ( 1 inch ):DC 15...28.8 V
• Input voltage hysteresis:-
• Signal logic input:Sinking input
• Frequency range:-
• Input resistance:-
• Input capacitance:-
• Input current for signal "2,5 cm ( 1 inch ):3 mA
• Connection of two-wire BEROs possible:Yes
• Max. permissible BERO quiescent current:0.5 mA
• Input delay of 0 cm ( 0 inch ) to "1:3 ms
• Input delay of 2,5 cm ( 1 inch ) to "0:3 ms
• Number of simultaneously usable inputs in horizontal configuration:8
• Number of simultaneously usable inputs in vertical configuration:8
• Input characteristic curve:IEC 61131-2, type 1
• Initial data size:8 Bit

Status Information, Alarms, Diagnostics:

• Status display:Green LED per channel
• Interrupts:No
• Process alarm:No
• Diagnostic interrupt:No
• Diagnostic functions:No
• Diagnostics information read-out:None
• Module state:Green LED
• Module error display:Red LED