Siemens Sicam P855 7KG85 Series - Communication Interfaces

13 Technical Data
13.1 General Device Data
269SICAM P850/P855, 7KG85xx, Device Manual
E50417-H1040-C482-A6, Edition 10.2018
13.1.3 Communication Interfaces
Ethernet (Connector Z)
Serial Interface (Connector J), optional
Ethernet, electrical
Connection Device top side
RJ45 connector socket
10/100Base-T acc. to IEEE802.3
LED yellow: 100 Mbit/s (off/on)
LED green:
 flashing: active
 on: not active
 off: no connection
Protocols Modbus TCP
IEC 61850 Server
Voltage strength DC 700 V
Transmission rate 100 Mbit/s
Cable for 10/100 Base-T 100 to 150  STP, CAT5
Maximum cable length
10/100 Base-T
100 m, if well installed
RS485 Connection Terminal side, 9-pin D-sub socket
Protocol
Modbus RTU
(optional)
IEC 60870-5-103
(optional)
Baud rate (adjustable) Min. 1200 bit/s
Max. 115 200 bit/s
Min. 9600 bit/s
Max. 38 400 bit/s
Maximum distance of trans-
mission
Max. 1 km (depending on transmission rate)
Transmission level Low: -5 V to -1.5 V
High: +1.5 V to +5 V
Reception level Low:  -0.2 V
High:  +0.2 V
Bus termination Not integrated, bus termination using plugs with integrated
bus terminating resistors (see figure 13-1 )