Val Controls I 24-AF Series Hardware Manual

DHW-UM-004
Val Controls A/S • Sallingsundvej 5 • DK-6715 Esbjerg N • Tel. +45 7547 0600
vc@valcontrols.com • www.valcontrols.com
Revision: 4
5/20
2.2 Modbus
Modbus
4
3
2
1
A
B
A
B
2.2.1 Terminals
Modbus
1 (A)
2 (B)
3 (A)
4 (B)
Terminals 1 and 3 are connected inside the device. Terminals 2 and 4 are connected inside the
device.
2.2.2 Electrical specifications
Modbus
Interface
RS485
Termination resistor
No internal resistor.
External resistor can be applied across terminal 3 and 4.
Termination resistors must have the value of 120 Ohm.
Galvanic isolated
A maximum of 247 nodes can be connected on the same daisy chain bus.
Typical shielding of the RS485 bus cable is done on the master side of the cable.

Val Controls I 24-AF Series Specifications

General

Brand	Val Controls
Model	I 24-AF Series
Category	Controller
Language	English