Furuno 2839S ユーザーズマニュアル

2. WIRING

2-17

2.4.3

How to set jumper blocks on I/O Board

How to set the termination resistors

Use the jumper blocks JP1 and JP2 on the I/O Board (24P0124) to set the termination
resistor J3 and J4 on or off. The default setting is termination resistor: on.

• When setting the starting/ending terminal for the multipoint connection, or multipoint

is not connected (CH1 or CH2): termination resistor ON

• When not setting the starting/ending terminal for the multipoint connection (CH1 or

CH2): termination resistor OFF

Processor unit, I/O Board (24P0124)

Jumper block J1

Connector J3

1-2

SHORT

Termination resistor: ON (default setting)

2-3

OPEN

1-2

OPEN

Termination connector: OFF

2-3

SHORT

Jumper block J2

Connector J4

1-2

SHORT

Termination resistor: ON (default setting)

2-3

OPEN

1-2

OPEN

Termination connector: OFF

2-3

SHORT

JP2

JP1

J11