5
4.2.
RS232-485 converter installation
See the converter manual for accurate installation.
4.3.
Computer, Converter and RS485 Option Card Configuration
4.3.1.
System configuration
Maximum cable length is 1200m but recommended length is within 700.
The number of connectable inverter is 31.
Figure 2. System configuration
4.3.2.
Communication signal connection
Figure 3. Option card terminal layout
Pin
S GND
T1
T2 N
P
Description
Shield Ground
Termination
Signal
* S: Networkd line ground shoud be done only one point.
Connect it to screw near terminal shield when grounding through inverter.
* GND: Ground terminal for 485 communication
* T1, T2: Shorting these terminals connects a terminating resistor.
Computer
232/485
Converter
Option card
Option card
Option card
Inverter 1
Inverter 2
Inverter n
…
S GND
T1
T2
N
P
Morek IT OÜ, Rauna 24, 76506 Saue Harjumaa, Estonia. www.morek.eu Tel. +372 604 1423 Fax +372 604 1447 morek@morek.eu