Siemens M7-400 Benutzerhandbuch

12-19

S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07

The table below contains the technical specifications of the ATM 478 AT adapter
module:

Number of connectable
AT modules (short)

1

Connection of
expansion modules

Yes

Supply voltage

5 VDC

Current consumption
(without AT module)

0.12 A

Current consumption of
the AT module

See calculation of
current consumption

Power losses
(without AT module)

0.6 W

Permissible power losses
(with AT module)

•

Without forced
ventilation

•

With forced ventilation

max. 10 W

max. 12 W

Dimensions
W x H x D (mm)

25 x 290 x 230

Weight (without AT module) 0.74 kg

Supply voltage

max. current

+ 5 V (4.75 V to 5.25 V)

4 A

- 5 V (- 4.4 V to - 5.3 V)

70 mA

+ 12 V (11.7 V to 12.3 V)

500 mA

- 12 V (- 10.9 V to - 13.5 V)

100 mA

The supply voltages -5 V, +12 V, and -12 V are
monitored. In the event of a fault, the “INTF” LED
on the CPU or application module lights up.

You can calculate the power consumption of the short AT module using the
following formula:

I

(AT module)

 = I

(- 5 V

) x 1.3 + (I

(+ 12 V)

 + I

(- 12V)

) x 3.12