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Siemens 6ES7421-7DH00-0AB0

SIMATIC S7-400, digital input SM 421, isolated 16 DI; UC 24 - 60 V, alarm, diagnostics

SiemensMFR # 6ES7421-7DH00-0AB0SKU # CEY-8EF3B02F13E4

from backplane bus 5 V DC, max.150 mA

Number of digital inputs16

Type of input voltageAC/DC

Rated value (UC)24 V; 24 V UC to 60 V UC (47 ... 63 Hz)

for signal "0"-6 to +6 V DC/ 0 to 5 V AC

for signal "1", typ.4 mA; 4 to 10 mA

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About This Product

SIMATIC S7-400, digital input SM 421, isolated 16 DI; UC 24 - 60 V, alarm, diagnostics

Siemens 6ES7421-7DH00-0AB0

Genuine, certified Siemens product
Fast sourcing through a worldwide supply network
Product selection and compatibility support from our technical team
Equivalent and alternative product suggestions
Quotation and lead time tailored to your request

Specifications

Input current

from backplane bus 5 V DC, max.150 mA

Power loss

Power loss, typ.8 W; 3.5 W (24 V DC); 6.5 W (48 V DC); 8.0 W (60 V DC)

Digital inputs

Number of digital inputs16

Input characteristic according to IEC 61131similar to IEC 61131-2

Number of simultaneously controllable inputs

Number of simultaneously controllable inputs16

Input voltage

Type of input voltageAC/DC

Rated value (UC)24 V; 24 V UC to 60 V UC (47 ... 63 Hz)

for signal "0"-6 to +6 V DC/ 0 to 5 V AC

for signal "1"15 to 72 V DC; -15 to -72 V DC; 15 to 60 V AC

Input current

for signal "1", typ.4 mA; 4 to 10 mA

for standard inputs

— ParameterizableYes

— Rated value0.5 ms; 0.5 / 3 / 10 / 20 ms

Encoder connection

Fixed current limitation for wire-break monitoring, min.18 kΩ; 18 kohms: Rated voltage 24 V (15 to 35 V); 39 kohms: Rated voltage 48 V (30 to 60 V)

Fixed current limitation for wire-break monitoring, max.56 kΩ; Rated voltage 60 V (50 to 72 V)

Cable length

shielded, max.1 000 m

unshielded, max.600 m; 600 m: 3, 10, 20 ms; 100 m: 0,5 ms

Connectable encoders

2-wire sensorYes

— permissible quiescent current (2-wire sensor), max.0.5 mA; 0.5 to 2 mA

Interrupts/diagnostics/status information

Diagnostics functionYes; Parameterizable

Alarms

Diagnostic alarmYes; Parameterizable

Hardware interruptYes; Parameterizable

Diagnoses

Diagnostic information readableYes; possible

Wire breakYes; I> 0.7 mA

Diagnostics indication LED

Status indicator digital input (green)Yes

Channel fault indicator F (red)No

Potential separation digital inputs

between the channelsYes

between the channels, in groups of1

between the channels and backplane busYes

Isolation

Isolation tested with1 500 V AC

Dimensions

Width25 mm

Height290 mm

Depth210 mm

Weights

Weight, approx.600 g

Accessories 1

Genuine accessories that can be used with the Siemens 6ES7421-7DH00-0AB0 motor and are supplied separately are listed below. Click a code to open the accessory page and see the other compatible motors.