Siemens Simatic M7-400 Manual de usuario descargar pdf (Pagina 180)

Digital Modules

4-58

S7-400, M7-400 Programmable Controllers Module Specifications

A5E00069467-07

Technical Specifications of the SM 421; DI 32 120 VUC

Dimensions and Weight

Dimensions W H D (mm) 25 290 210

Weight Approx. 600 g

Data for Specific Module

Number of inputs 32

Length of cable

• Unshielded

• Shielded

600 m

1000 m

Voltages, Currents, Potentials

Rated load voltage L+ 79 to 132 VAC

80 to 132 VDC

• Reverse polarity protection Yes

Number of inputs that can be

triggered simultaneously

32

Isolation

• Between channels and

backplane bus

Yes

• Between the channels Yes

– In groups of 8

Permitted potential difference

• Between M

internal

and the

inputs

120 VAC

• Between the inputs of the

different groups

250 VAC

Insulation tested with 1500 VAC

Current consumption

• From the backplane bus Max. 0.2 A

Power dissipation of the

module

Typ. 6.5 W

Status, Interrupts, Diagnostics

Status display Green LED per

channel

Interrupts None

Diagnostic functions None

Data for Selecting a Sensor

Input voltage

• Rated value

• For signal “1”

• For signal “0”

120 VUC

79 to 132 VAC

80 VDC to 132 VDC

0 to 20 V

• Frequency range 47 to 63 Hz

Input current

• At signal “1”

• At signal “0”

2 mA to 5 mA

0 to 1 mA

Input delay

• At “0” to “1”

• At “1” to “0”

5 to 25 ms

5 to 25 ms

Input characteristic curve To IEC 61131; type 1

Connection of two-wire BEROs

• Permitted bias current

Possible

Max.1 mA

1 2 ... 175 176 177 178 179 180 181 182 183 184 185 ... 637 638

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