Siemens 6ES7221-1BF22-0XA8 SIMATIC S7-200 CN EM 221 8DI 24V DC Modulus Ingressus

Conspectus

Siemens SIMATIC S7-200 CN

6ES7221-1BF22-0XA8 SIMATIC S7-200 CN EM 221 8DI 24V DC Input Module

An eight-input EM 221 expansion module for S7-200 CN systems, using 24 V DC sink/source inputs in a 46 mm-wide housing.

Ad Primum Aspectum

Nota	Siemens
Modellum	6ES7221-1BF22-0XA8
Typus Producti	EM 221 digital input expansion module
Functio principalis	Reading DC switch and sensor signals
Applicatio	Supported S7-22X CPUs

DC sensor inputs

Eight sink/source inputs accept 24 V DC field signals.

CPU power budget

The expansion module needs 30 mA from the CPU’s 5 V supply.

Defined response

The expansion inputs have a maximum 4.5 ms input delay.

Product Overview

6ES7221-1BF22-0XA8 Adds eight 24 V DC digital inputs to a supported S7-22X CPU in the SIMATIC S7-200 CN system.

Its sink/source wiring supports suitable field switches and proximity sensors, while optical isolation, signal thresholds and fixed expansion-input delay determine how the module should be connected and used.

Focus ordinandi: Retain the CN suffix 0XA8, check CPU expansion capacity and the 5 V power budget, and match the common wiring to the selected sensor polarity.

Key Functions

Wire sinking or sourcing field devices

The DC input circuit supports sink/source arrangements, with a minimum ON threshold of 15 V DC at 2.5 mA and a maximum OFF threshold of 5 V DC at 1 mA.

Extend ordinary digital acquisition

The module provides eight expansion inputs with a maximum delay of 4.5 ms, making signal duration an important selection criterion.

Plan the CPU and sensor supplies

Allow 30 mA from the 5 V expansion supply and approximately 4 mA per active input from the field circuit.

Official Specifications

Digital Input Points	8
Rated Input Signal	24 V CC a 4 mA
Circuitus inputus	Sink/source; IEC Type 1 sinking input
Maximum Continuous Input Voltage	30 V DC
Maximum Surge Input Voltage	35 V DC for 0.5 s
ON-State Threshold	At least 15 V DC at 2.5 mA
OFF-Statusumbrag	Maximal 5 V DC bei 1 mA
Délai d’entrée maximal	4.5 ms
Maximale Zwei-Draht-Sensor-Leckage	1 mA
Isolatio inter campum et logicam	Optisch; 500 V AC-Test für 1 Minute
Longitudo maxima cavi signali	500 m shielded; 300 m unshielded
Gleichzeitiger Eingangsbetrieb	Alle Eingänge bei 55 °C horizontal oder 45 °C vertikal
5-V-Erweiterungsversorgungsanforderung	30 mA
Dissipatio Energiae Typica	2 W
Abmessungen (Breite × Höhe × Tiefe)	46 × 80 × 62 mm

Fons officialis: Manuscriptum systēmatis Siemens S7-200

Quaestiones Frequenter Rogatae

Welche CPU-Generation wird für 6ES7221-1BF22-0XA8 benötigt?

Modulus expansionis EM 221 destinatus est ad CPUs S7-22X supportatas.

Num potest 6ES7221-1BF22-0XA8 connecti esse tam pro sensoribus in dispositione sinking quam pro sensoribus in dispositione sourcing?

Circuits intrantis 24 V DC sustinet dispositiones sinking et sourcing, dum communis intrantis ad polariatem sensoris electam connectitur.

Num impulsum valde brevem 6ES7221-1BF22-0XA8 certe capiet?

Intrantes expansionis habent moram maximam 4,5 ms; ergo applicationes signa intrantia longa satis praebere debent ut certe agnoscantur.

Quanta pars copiae potentiae 5 V CPU ab 6ES7221-1BF22-0XA8 consumitur?

Hic modulus 30 mA ex supply expansionis 5 V requirit.

Quod limitum de fuga applicatur sensoribus duorum filorum in 6ES7221-1BF22-0XA8?

Maxima currentis fuga permittenda pro sensoribus proximitatis duorum filorum est 1 mA.

Quousque cymbalum sensoris ad 6ES7221-1BF22-0XA8 protrahi potest?

Longitudo maxima cavi introducti est 500 m si scutatum est, aut 300 m si non scutatum est.

Potestne omnis canalus 6ES7221-1BF22-0XA8 manere activus ad temperaturam superiorem installationis?

Omnes introitus possunt esse simul activi ad 55 °C in installatione horizontali aut ad 45 °C in installatione verticali.

Compatibility & Ordering Notes

Antequam ordinatur 6ES7221-1BF22-0XA8: Specifica totum articulum S7-200 CN, verifica limitem expansionis CPU S7-22X et currentem 5 V disponibilem, et elige connexionem sensoris quae conveniat dispositioni communis introitus moduli.

Index compatibilitatis pro 6ES7221-1BF22-0XA8

• Utere EM 221 cum CPU S7-22X suffragata et includere eum in calculationibus moduli expansionis CPU et rationis potestatis.
• Retine 0XA8 dum ordinatur variatio CN; referentia transversa Siemens eam connectit ad EM 221 8 × 24 V DC specificationes connexionis et operationis.
• Elige connexionem descendens vel ascendens pro sensore et observa dispositionem communis introitus.
• Tenere l’ingresso continuamente a 30 V CC o inferiore e dimensionare la durata del segnale per il ritardo massimo di 4,5 ms.
• Consentire limiti di temperatura ridotti per l’ingresso completo nelle installazioni verticali e fornire la ventilazione richiesta per l’involucro.

Hot Selling Models