Siemens Simatic M7-400 Manual de usuario descargar pdf (Pagina 168)

100

101

Digital Modules

4-46

S7-400, M7-400 Programmable Controllers Module Specifications

A5E00069467-07

Technical Specifications of the SM 421; DI 16 24/60 VUC

Programming package

Associated programming

package

As of STEP 7 V 2.0

Dimensions and Weight

Dimensions W H D

(in millimeters)

25 290 210

Weight Approx. 600 g

Data for Specific Module

Number of inputs 16

Length of cable

• Unshielded

input delay

– 0.5 ms

– 3 ms

– 10 / 20 ms

Max. 100 m

Max. 600 m

• Shielded line length 1000 m

Voltages, Currents, Potentials

Number of inputs that can be

triggered simultaneously

Isolation

• Between channels and

backplane bus

Yes

• Between the channels Yes

– In groups of 1

Permitted potential difference

• Between the different

circuits

75 VDC, 60 VAC

Insulation tested with

• Channels against

backplane bus and load

voltage L+

1500 VAC

• Channels among one

another

1500 VAC

Current consumption

• From the backplane bus Max.150 mA

Power dissipation of the

module

Typ. 8 W

Status, Interrupts, Diagnostics

Status display Green LED per

channel

Interrupts

• Hardware interrupt

• Diagnostic Interrupt

Parameters can be

assigned

Parameters can be

assigned

Diagnostic functions Parameters can be

assigned

• Group error display

– For internal fault Red LED (INTF)

– For external fault Red LED (EXTF)

• Channel error display (F) None

• Diagnostic information can

be displayed

Possible

Monitoring for

• Wire break I > 0.7 mA

Substitute value can be applied No

Sensor Selection Data

Input voltage

• Rated value 24 VUC to 60 VUC

• For signal “1” 15 to 72 VDC

-15 VDC to -72 VDC

15 to 60 VAC

• For signal “0” -6 VDC to +6 VDC

0 VAC to 5 VAC

Frequency range 47 DC/AC to 63 Hz

Input current

• At signal “1” Typ. 4 mA to 10 mA

Input characteristic curve Similar to IEC 61131

Connection of two-wire BEROs

• Permitted bias current

Possible

Max. 0.5 mA to 2 mA

Time, Frequency

Internal preparation time for

• Only hardware interrupt

enable

Max. 450 s

• Enable hardware and

diagnostic interrupts

Max. 2 ms

Input delay

• Parameters can be

assigned

Yes

• Rated value 0.5/3/10/20 ms

Values go into cycle and response times.

Sensor Circuit

Resistance circuit of the sensor

for wire break monitoring

• Rated voltage 24 V

(15 V to 35 V)

• Rated voltage 48 V

(30 V to 60 V)

• Rated voltage 60 V

(50 V to 72V)

18 kΩ

39 kΩ

56 kΩ

) IEC 61131 does not specify any data for UC

modules. The values have been adapted as much

as possible to IEC 61131.

Minimum closed-circuit current is required for wire

break monitoring.

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