User Manual

7000 Bus Converter User’s Manual (Version 1.8 Jan/2006, 7PH-006-18) --------------- 14

2.3.3 The I-7520A has three different output types

Selecting the I-7520A output type.

NOTE: The RS-422 and RS-485 output types couldn’t be used

simultaneously, which means that you can only select 1 type to output.

Type 1: 1-channel RS-485 output.

Type 2: 1-channel RS-422 output.

Type 3: 2-channel RS-485 output. (Support star network)

RS422/485 Output Jumpers settings:

For type 1: Set the JP1 jumper to positions 2 and 3.

For type 2: Set the JP1 jumper to positions 2 and 3.

For type 3: Set the JP1 jumper to positions 1 and 2.

JP1

Types 1 and 2:

Default setting

RS-422 or RS-485

JP1

Type 3:

2-channel RS-485

Pin Assignment For type1 and type2:

RS-485 Pin define:

DATA+ and DATA-

RS-422 Pin define:

TX+, TX-, RX+ and RX-

Pin Assignment For type3:

Channel one Pin define:

DATA1+ and DATA1-

Channel two Pin define:

DATA2+ and DATA2-