For Siemens Plc S7 400

Supply voltage

Load voltage L+

● Rated value (DC)

24 V; Only required for supplying 2-wire transmitters

● Reverse polarity protection

Yes

Input current

from load voltage L+ (without load), max.

200 mA; for 8 connected, fully controlled 2-wire transmitters

from backplane bus 5 V DC, max.

1 000 mA

Power loss

Power loss, typ.

4.9 W

Analog inputs

Number of analog inputs

8

● For voltage/current measurement

8

● For resistance measurement

4

permissible input voltage for voltage input (destruction limit), max.

18 V; 18 V continuous, 75 V for 1 ms (mark to space ratio 1:20)

permissible input current for current input (destruction limit), max.

40 mA; Permanent

Input ranges

● Voltage

Yes

● Current

Yes

● Thermocouple

No

● Resistance thermometer

No

● Resistance

Yes

Input ranges (rated values), voltages

● 1 V to 5 V

Yes

● Input resistance (1 V to 5 V)

10 MΩ

● -1 V to +1 V

Yes

● Input resistance (-1 V to +1 V)

10 MΩ

● -10 V to +10 V

Yes

● Input resistance (-10 V to +10 V)

100 kΩ

Input ranges (rated values), currents

● -20 mA to +20 mA

Yes

● Input resistance (-20 mA to +20 mA)

50 Ω

● 4 mA to 20 mA

Yes

● Input resistance (4 mA to 20 mA)

50 kΩ

Input ranges (rated values), resistors

● 0 to 600 ohms

Yes

Cable length

● shielded, max.

200 m

Analog value generation for the inputs

Integration and conversion time/resolution per channel

● Resolution with overrange (bit including sign), max.

14 bit; 14 / 14 / 14

● Integration time, parameterizable

Yes

● Basic conversion time (ms)

52 µs

● Interference voltage suppression for interference frequency f1 in Hz

none / 400 / 60 / 50 Hz

Encoder

Connection of signal encoders

● for voltage measurement

Yes; possible

● for current measurement as 2-wire transducer

Yes

● for current measurement as 4-wire transducer

Yes

● for resistance measurement with two-wire connection

Yes; Line resistances are also measured

● for resistance measurement with three-wire connection

Yes; Line resistances are also measured

● for resistance measurement with four-wire connection

Yes

Errors/accuracies

Operational error limit in overall temperature range

● Voltage, relative to input range, (+/-)

0.7 %; ±0.7 % at ±1 V; ±0.9 % at ±10 V, 1 to 5 V

● Current, relative to input range, (+/-)

0.8 %; at ±20 mA, 4 to 20 mA

● Resistance, relative to input range, (+/-)

1 %

Basic error limit (operational limit at 25 °C)

● Voltage, relative to input range, (+/-)

0.6 %; 0.6 % at ±1 V; 0.75 % at ±10 V, 1 to 5 V

● Current, relative to input range, (+/-)

0.7 %; at ±20 mA, 4 to 20 mA

● Resistance, relative to input range, (+/-)

0.7 %; 0 to 600 ohms

Potential separation

Potential separation analog inputs

● Potential separation analog inputs

Yes; internal/external

● between the channels

No

Isolation

Isolation tested with

2 120 V DC between bus and analog section; 500 V DC between bus and local ground; 500 V DC between analog part and L+/M; 2 120 V DC between analog part and local ground; 2 120 V DC between L+/M and local ground

Dimensions

Width

25 mm

Height

290 mm

Depth

210 mm

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