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Table 973:
Jumper connectors for COM1 serial connection type
Group
Jumper connection
Description
X16
1-2
EIA-485 selected for COM1
2-3
FO_UART selected for COM1
X15
1-2
Star topology selected for
FO_UART
2-3
Loop topology selected for
FO_UART
X24
1-2
FO_UART channel idle state:
Light on
2-3
FO_UART channel idle state:
Light off
It is recommended to enable biasing only at one end of the bus.
Termination is enabled at each end of the bus
It is recommended to ground the signal directly to ground from one node
and through capacitor from other nodes.
The optional communication modules include support for EIA-485 serial communication
(X5 connector). Depending on the configuration the communication modules can host
either two 2-wire ports or one 4-wire port.
The two 2-wire ports are called as COM1 and COM2. Alternatively, if there is only one
4-wire port configured, the port is called COM2. The fiber optic ST connection uses the
COM1 port.
Table 974:
EIA-485 connections for COM0008 and COM0010
Pin
2-wire mode
4-wire mode
9
COM1
A/+
COM2
Rx/+
8
B/-
Rx/-
7
COM2
A/+
Tx/+
6
B/-
Tx/-
5
AGND (isolated ground)
Table continues on next page
Section 13
1MAC059074-MB A
Protection relay's physical connections
1162
615 series ANSI
Technical Manual
Содержание Relion 615 series
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