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7000 Bus Converter User Manual (version 1.2,Feb/2003, 7PH-006-10) --------------- 17
2.3.3 I-7520A has three different output type
How to select I-7520A’s output type?
NOTE: RS-422 and RS-485 output type can’t use at the same time.
Type 1: One channel RS-485 output.
Type 2: One channel RS-422 output.
Type 3: Two channels RS-485 output.
RS422/485 Output Jumpers setting:
For type 1: Set JP1 jumper to positions 1 and 2.
For type 2: Set JP1 jumper to positions 1 and 2.
For type 3: Set JP1 jumper to positions 2 and 3.
2.3.4 I-7520A is designed Termination resistor (120 Ohm) on board
Add / Remove resistor Jumper. For RS-485 channel one.
For Add resistor: Set JP2 jumper to positions 2 and 3.
For Remove resistor: Set JP2 jumper to positions 1 and 2.
1
2
3
JP2
Default sitting
120 Ohm on board
1
2
3
JP2
Remove resistor
1
2
3
JP1
Default sitting
RS-422 or RS-485
1
2
3
JP1
Set Type 3:
2-channels RS-485