The optional RS485 interface allows Modbus RTU and IEC 60870-5-103 protocols.
Time Synchronization
During operation, the device needs the date and time for all time-relevant processes. This ensures that a
common time basis exists when communicating with peripheral devices and enables time stamping of the
process data.
The following types of time synchronization can be executed:
•
External time synchronization via Ethernet NTP (preferred)
•
External time synchronization via fieldbus
•
Internal time synchronization via RTC (if external time synchronization is not available)
Parameterization
Parameters are set using an internal Web browser with HTML pages from the connected computer (preferred).
In addition, a parameterization of the device is possible with use of the 4 softkeys and display on the front of
the device. Not all parameters can be changed.
Comparison of the SICAM P850 and P855 Features
Function Feature P850 P855
Measured values Basic values U, I, f, u2, I2, PF, etc. x x
Power P, Q, S x x
PQ values THDs
Voltage harmonics (1-40th)
Harmonic currents (1-40th)
Flicker
x x
Basic functions Language (US/DE/CN) x x
Group indications x x
Binary outputs x x
Limit violations x x
Energy Energy x x
Frozen energy x x
Load profile x x
Tariffs x x
Records Event records x x
Waveform records x x
Measurement records - x
Trend records - x
EN 50160 report - x
Communication IEC 61850 x x
Modbus TCP/RTU x x
IEC 60870-5-103 x x
SNMP x x
Ethernet switch x x
Security Web logon x x
Firmware signature x x
HTTPS x x
Customer support functions x x
Fallback mode x x
Introduction
1.1 User Information
16 SICAM, SICAM P850/P855 7KG85X, Manual
E50417-H1040-C482-A9, Edition 03.2022
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