Siemens SINUMERIK 840D sl TCU 30.3 Equipment Manual

8.2 Supplementary electrical conditions
8.2.1 Power supply
Requirements for DC power supplies
WARNING
Electric shock due to connection of an unsuitable power supply
When equipment is connected to an unsuitable power supply and/or insu󹪟ciently grounded
(Page27), exposed components may carry a hazardous voltage that might result in serious
injury or death.
• Only use power supplies that provide SELV (Safety Extra Low Voltage) or PELV (Protective
Extra Low Voltage) output voltages acc. to UL 61010 for all connections and terminals of the
electronics modules.
WARNING
Inadequately fused supply cables can be life-threatening
In the case of supply lines >30 m, protectors must be installed at the device input to protect
against lightning (surge).
The DC power supply must be connected to the ground/shield of the NC for EMC and/or
functional reasons. For EMC reasons, this connection should only be made at one point. As a
rule, the connection is provided as standard in the S7-300 I/Os. In exceptional circumstances
when this is not the case, the ground connection should be made on the grounding rail of the
NC cabinet (also refer to /EMC/EMC Installation Guide.)
Table 8-1 Requirements of the DC power supply
Rated voltage According to EN 61131-2
Voltage range (mean value)
Voltage ripple, peak/peak
Powering up time when switched
on
24 VDC
20.4 VDC to 28.8 VDC
5% (unsmoothed 6-pulse recti󹪝‐
cation)
any
Non-periodic overvoltages
Period of overvoltage
Recover time
Events per hour
≤ 35 V
≤ 500 ms
≥ 50 s
≤ 10
Transient voltage interruptions Downtime
Recovery time
Events per hour
≤ 3 ms
≥ 10 s
≤ 10
Technical data
8.2Supplementary electrical conditions
TCU 30.3
80 Equipment Manual, 03/2023, A5E40874197B AD

Siemens SINUMERIK 840D sl TCU 30.3 Specifications

General

Brand	Siemens
Model	SINUMERIK 840D sl TCU 30.3
Category	Security Sensors
Language	English