Siemens SIMATIC S7-1500 Manual page 91

Technical specifications
Derating information for total current of outputs
If the digital outputs of the TM PosInput 2 are operated with inductive loads, you should
derate the total current of the loads at the digital outputs of the respective channel. The total
current is the sum of the load currents at all digital outputs of a channel (without encoder
supply).
The following derating curve shows the load capacity of the digital outputs depending on the
ambient temperature and mounting position under the following conditions:
● Maximum switching frequency at digital outputs of 0.5 Hz
● Load resistance: 48 Ω (IEC 947-5-1)
● Load inductance: 1150 mH (IEC 947-5-1)
①
Vertical installation of the system
②
Horizontal installation of the system
Figure 6-1 Total current depending on ambient temperature and mounting position for inductive loads
Note
If the switching frequency is greater than 0.5 Hz or there is greater inductance at the digital
outputs, the total current must be reduced further.
90
Technology module TM PosInput 2 (6ES7551-1AB00-0AB0)
Manual, 06/2018, A5E03982218-AB