60
D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
ELECTRICAL INSTALLATION
CHAPTER 3: INSTALLATION
Inter-relay communication modules
The inter-relay communications modules support high speed direct communications
between UR
Plus
-series devices. The direct inputs and outputs feature uses the
communications channels provided by these modules to exchange digital state
information between devices. This feature is available on all UR
Plus
-series devices.
The communications channels are normally connected in a ring configuration as shown
below. The transmitter of one module is connected to the receiver of the next module. The
transmitter of this second module is then connected to the receiver of the next module in
the ring. This is continued to form a communications ring.
The interconnection for dual-channel communications modules is shown below. Two
channel modules allow for a redundant ring configuration. That is, two rings can be
created to provide an additional independent data path. The required connections are:
URPlus1-Tx1 to URPlus2-Rx1, URPlus2-Tx1 to URPlus3-Rx1, URPlus3-Tx1 to URPlus4-Rx1,
and URPlus4-Tx1 to URPlus1-Rx1 for the first ring; and URPlus1-Tx2 to URPlus4-Rx2,
URPlus4-Tx2 to URPlus3-Rx2, URPlus3-Tx2 to URPlus2-Rx2, and URPlus2-Tx2 to URPlus1-
Rx2 for the second ring.
6B Contact input
2 –
Contact input
2 –
Contact input
2 –
Form-A output
6 –
Contact input
12 +
Form-A output
6 –
7A Contact input
3 +
Contact input
3 +
Contact input
3 +
Form-A output
7 +
Contact input
13 +
Form-A output
7 +
7B Contact input
3 –
Contact input
3 –
Contact input
3 –
Form-A output
7 –
Contact input
14 +
Form-A output
7 –
8A Contact input
4 +
Contact input
4 +
Contact input
4 +
Form-A output
8 +
Contact input
15 +
Form-A output
8 +
8B Contact input
4 –
Contact input
4 –
Contact input
4 –
Form-A output
8 –
Contact input
16 +
Form-A output
8 –
9A Contact input
5 +
Contact input
5 +
Contact input
5 +
Contact input
1 +
Contact input
17 +
Form-A output
9 +
9B Contact input
5 –
Contact input
5 –
Contact input
5 –
Contact input
1 –
Contact input
18 +
Form-A output
9 –
10
A
Contact input
6 +
Contact input
6 +
Contact input
6 +
Contact input
2 +
Contact input
19 +
Form-A output
10 +
10
B
Contact input
6 –
Contact input
6 –
Contact input
6 –
Contact input
2 –
Contact input
20 +
Form-A output
10 –
11
A
Contact input
7 +
Contact input
7 +
Contact input
7 +
Contact input
3 +
Contact input
21 +
Form-A output
11 +
11
B
Contact input
7 –
Contact input
7 –
Contact input
7 –
Contact input
3 –
Contact input
22+
Form-A output
11 –
12
A
Contact input
8 +
Contact input
8 +
Contact input
8 +
Contact input
4 +
Contact input
23 +
Form-A output
12 +
12
B
Contact input
8 –
Contact input
8 –
Contact input
8 –
Contact input
4 –
Common –
Form-A output
12 –
Pi
n
Contact input/output module
Type A
Type B
Type C
Type D
Type E
Type F
