M7-400 Expansions

12-19

S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
12.3.2 Technical Specifications of the ATM 478 AT Adapter Module

Technical Specifications of the ATM 478

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

module:

ATM 478
6ES7 478-2CA00-0AC0
Performance Features
Number of connectable
AT modules (short) 1
Connection of
expansion modules Yes
Technical Specifications
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 of the AT Module
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.

Calculation of Power Consumption

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