FEC920: USER GUIDE
Appendix B
Page 220
September 18
B4 TCP PORT NUMBERS
The following TCP ports are made use of by the instrument.
Port
Usage
20
File Transfer protocol (FTP) data
21
FTP control
502
Modbus TCP communications
B5 ISOLATION DIAGRAM
Figure B.4 Isolation diagram
Note:
Each ‘PV’ is double isolated (300VRMS) from all other ‘PV’s.
Supply voltage
100 to 240V ac
or
24V ac or dc
PV2*
PV3*
PV4*
USB Comms
PSU Logic/
Digital I/O
Ethernet
comms
Relays /
DC output
PV1*
Double (300V ac)
Double (300V ac)
Double (300V ac)
Double (300V ac)
Double (300V ac)
Single (50V ac)
Micro-
processor and
system circuits
SN1
Double (300V ac)
Power
Supply
Circuits
Rectifica-
tion
Safety Earth
(Protective
conductor
terminal)
A5E45696052A Rev-AA