SIEMENS
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Siemens IK PI · 2015
PROFINET/Industrial Ethernet
Accessories
SICLOCK Time synchronization
> Central plant clocks
2
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Overview
SICLOCK TC100 and SICLOCK TC400 central plant clocks
The central plant clocks evaluate the clock time data that was
transmitted from the wireless receiver and generate diverse
output signals in order to synchronize the connected I/O
devices.
If the wireless receiver fails or signal transmission is interrupted,
the central plant clocks switch over to their internal high-preci-
sion quartz system and thus ensure reliable tracking of the clock
time. When the input signal is available again, the central plant
clock adjusts any time differences that may have occurred
without time jumps by means of "microsteps".
Inputs and outputs
The high-precision SICLOCK TC100 and SICLOCK TC400
central plant clocks have one (SICLOCK TC100) or two
(SICLOCK TC400) inputs for connection to wireless receivers.
The central plant clocks have one (SICLOCK TC100) or four
(SICLOCK TC400) independent 10/100 Mbit Ethernet inter-
faces.
The network stations are synchronized using the proven SNTP
standard and by means of the SIMATIC procedure.
The SICLOCK central plant clocks have two relay outputs for
signaling alarms or warnings.
Alternatively and/or in addition, two point-to-point connections
TTY (20 mA current interface) or one RS 422 (5 V level) connec-
tion can be set up for the SICLOCK TC400 central plant clock.
Operation
Parameterization of the interfaces, setting of the signal types,
redundancy modes, and read-out of the status messages stored
in the device are conveniently implemented via the integrated
web interface.
LEDs and a display indicate operating states and show any error
messages, which can also be read out via the web interface.
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Ordering data
Article No.
Central plant clock
A wireless receiver supplies the
central plant clocks with time data;
these then generate signals which
are used to synchronize the con-
nected I/O devices.
• SICLOCK TC400 central plant
clock, single device
2XV9450-2AR01
• SICLOCK TC100 central plant
clock, single device
2XV9450-2AR22
© Siemens AG 2014