Programming; Position Of Jumpers And Dip Switch; Bus End-Of-Line Resistor (Eol) - Honeywell IB2 Mounting And Connection Instructions

22
6.

Programming

6.1

Position of jumpers and DIP switch

1
U-EXT
2
0V
3 U-EXT
4
0V
1
2
Changes to the DIP switch positions are only accepted after a reset. With the exception
of the DIP switch S8 which is immediately accepted when in operation.
6.2 Bus End-of-line resistor
6.2.1 EOL on IB2 interface
With jumpers JP1 and JP2 the EOL resistor of the
Basically note: The bus line must be terminated at
Principle: EOL resistor on IB2 BUS interface:
first user
A
B
beginning or end
- The user is at the
- Activate EOL resistor
- The user is between the beginning or end
Deactivate
- EOL resistor
Procedure:
Activate EOL resistor:
Deactivate EOL resistor:
6.2.2 EOL on BUS-2 interface
On BUS-2 interface the EOL resistors must be deactivated.
Remove jumpers if required (JP1 and JP2).
Mounting and Connection Instructions IB2 16 I/O Expander
ON
ON
1 2 3 4 5 6 7 8
DIP switch
LED 1 2
9
10
(EOL)
user 2
max. 1000 m
of the line:
Set both jumpers
Remove both
3
CPU
IB2 interface is activated/deactivated.
both ends with 120 Ohm
user 3
of the line:
jumpers
JP1
JP2
.
user 4 last user
JP1
JP2
JP1
JP2
JP1
JP2
UB
0V
B
A/D