Siemens SINUMERIK HT 10 User Manual

Table 7-1 DC power supply requirements according to EN 61131-2
Rated voltage According to EN 61131-2
Voltage range (mean value)
Voltage ripple, peak/peak
Ramp-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
7.4.2 Grounding concept
Components
SINUMERIK ONE and SINUMERIK 840D sl systems consist of a number of individual components,
which have been designed so that, as a system, they comply with the relevant EMC and safety
standards. The individual system components are:
• Numerical Control Unit (NCU)
• Machine Control Panel (MCP), Machine Pushbutton Panel (MPP)
• Keyboard
• Operator panels (operator panel front + TCU/PCU)
• Distributor box and handheld unit
• S7-300 I/O with IM 153 interface module
Grounding measures
The individual modules are attached to a metal cabinet panel. Insulating paints on the mounting
points (e.g. tension jacks) must be removed.
It is permissible to cluster the operator control components regarding connection/potential
bonding.
Example: The control panel on the swivel arm.
It is su󹪟cient in this instance to connect the ground connections of, for example, the PCU, TCU,
and operator panel front using a cable and to route a shared grounding conductor to the central
ground connection in the control cabinet.
Please note that interruption of the grounding during maintenance work is not permissible.
Note
The HT 10 is not a󹪜ected by these grounding measures, which concern the connection box /
distribution box to which the HT 10 is connected.
Technical speci󹪝cations
7.4 Supplementary electrical conditions
Handheld Terminal HT 10
84 Equipment Manual, 09/2020, A5E47430965B AA

Siemens SINUMERIK HT 10 Specifications

General

Brand	Siemens
Model	SINUMERIK HT 10
Category	Touch terminals
Language	English