Siemens SIMATIC ET 200SP Manual page 52

Derating information for total current of digital outputs
If the digital outputs of the TM PTO 2x24V are operated with resistive or inductive loads, you
should derate the total current of the loads at the digital outputs of the technology module.
The total current is the sum of the load currents at the two digital outputs CH0.ED and
CH1.ED of the module.
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 0.5 Hz
• Load resistance: 48 Ω (IEC 947-5-1)
• Load inductance: 1150 mH (IEC 947-5-1)
①
②
Figure 6-1
Note
If the switching frequency is greater than 0.5 Hz or there is greater inductance at the digital
outputs (CHn.ED), the total current must be further reduced.
Technology module TM PTO 2x24V (6ES7138‑6EB00‑0BA0)
Equipment Manual, 09/2021, A5E50983437-AA
Vertical installation of the system
Horizontal installation of the system
Total current (CHn.ED) by ambient temperature and mounting position for resistive or
inductive loads
Technical specifications
51