Usb-Interface; Potential At Control Voltage Connections - Helios EUR EC Instructions D'installation Et D'utilisation

Installation and Operating Specification EUR EC
Networking with telephone wire
Connection at MODBUS Master via the terminals: A (1D+), B (1D-), ID and GND
Connection of the Slave members via the terminals: A (D+), B (D-), GND and ID1 / ID2
5.10

USB-interface

Over the USB interface if necessary a software update can be made. For this a consultation with the
manufacturer is necessary.
Danger due to electric current
Plug the jumper J1 to both PINs only for a software update via USB interface. The device will not
switch on if this jumper is plugged to both PINs!
Do not replug the jumper under voltage, observe the safety instructions!
5.11

Potential at control voltage connections

The connections for the control voltage (< 30 V) relate to the common GND potential (exception: relay
contacts are potential-free). There is a potential isolation between the connections for the control
voltage and the PE conductor. It must be ensured that the maximum external voltage at the con-
nections for the control voltage cannot exceed 30 V (between the "GND" and "PE" conductor
terminals). A connection to the PE conductor potential can be made if required; fit a bridge between
the "GND" terminal and the "PE" connection (terminal for shield).
L-BAL-E274-GB 1914 Index 003
MODBUS Master
1
MODBUS Slave
MODBUS MODBUS
(RS-485) (RS-485)
A B A B
GND ID1 GND
(D+) (D-) (D+) (D-)
MODBUS Slave
MODBUS
(RS-485)
A
ID2 GND
(D+)
Part.-No.
13/117
Electrical installation
2
MODBUS
(RS-485)
B A B
ID1 GND ID2
(D-) (D+) (D-)
v_modbus_master_autoadr.vsd
3...32
13.03.2013