KROHNE ALTOSONIC V EN - Manual (Page 88)

ALTOSONIC V
Operating Manual rev02 E 7.30850.34.00 Page 88 of 106
9.2 RS485/422 card
There are two possible generations of RS485 cards
9.2.1 RS485/422 card: AX4285A
The first generation of RS 485 cards used
DIP SWITCH CH1*** : COM 3 Baseaddress ch#1: 3E8
DIP SWITCH CH2*** : COM 4 Baseaddress ch#2: 2E8
JP1*** : COM3 Interrupt IRQ4
JP2*** : COM4 Interrupt IRQ3
JP3*** : COM3 RS 485 mode
JP4*** : COM3 Serial resistors enabled, No jumpers installed
JP5 : COM4 RS 485 mode as a default
JP6 : COM4 Serial resistors not enabled, jumpers installed
***(=KROHNE Altometer setting)
NOTE:
RS485 mode and RS422 mode for COM4 (Modbus) differs in set-up by:
- Jumper JP5 RS485 or RS422
- The external wiring for RS422 and RS485
External wiring AX5285A for Modbus:
The resistors of 120 Ohm must be placed At the ALTOSONIC V wiring terminal