NR Electric PCS-9611, Instruction Manual

Page: 237 / 300

10 Communication
PCS-9611 Feeder Relay
10-3
Date: 2014-04-08
 It is extremely important that the 120Ω termination resistors are fitted. Failure to do so will
result in an excessive bias voltage that may damage the devices connected to the bus.

As the field voltage is much higher than that required, NR can not assume responsibility for
any damage that may occur to a device connected to the network as a result of incorrect
application of this voltage.

Ensure that the field voltage is not being used for other purposes (i.e. powering logic inputs)
as this may cause noise to be passed to the communication network.
10.2.2 Ethernet Interface
This relay provides some rear Ethernet interfaces and they are unattached to each other. The
parameters of each Ethernet port can be configured in the submenu
“
Comm Settings
” (see
Section 7.6 ) except for the protocol which is a uniform parameter for these Ethernet ports.
10.2.2.1 IP Address and Network Communication Address
A brief explanation of IP and network submask is made as below. There are four sections for an IP
address.
Section 1
Section 2
Section 3
Section 4
xxx.xxx.xxx.xxx
Figure 10.2-2 Format of IP and submask address
Where:

Section 1 and Section 2 can be set separately

Section 3 × 256 + Section 4 = network communication address for IEC60087-5-103
The network communication address for IEC60087-5-103 has above relationship described as an
equation with section 3 and section 4 of the IP address.
10.2.2.2 Ethernet Standardized Communication Cable
It is recommended to use 4-pair screened twisted category 5E cable as the communication cable.
A picture is shown below.
Figure 10.2-3 Ethernet communication cable