If the MODBUS interface is used for network a
“
Z-Modul-A
”
(Part.-No. 380054) is necessary to use an
external terminal at the same time.
5.13
Digital inputs (D1, D2)
Di
ff
erent functions can be assigned to the digital inputs
“
D1
”
and
“
D2
”
(see IO Setup: Functional
overview of digital inputs). Activation via
fl
oating contacts, a low voltage of approx. 24 V DC is
connected.
Danger due to electric current
Never apply line voltage to the digital input!
Note the input resistance (see technical data).
5.14
Relay outputs (K1, K2)
Various functions can be allocated to the relay outputs
“
K1
”
and
“
K2
”
(see IO Setup: function and
inverting relais outputs). Max. contact rating see technical data and connection diagram.
Relays K1
•
Connection of the
fl
oating contacts of relay
“
K1
”
to the terminals 11, 14, 12.
•
“
K1 Function
”
factory setting:
|
1K
|
=
Operating indication
. I.e. energized for operation without
fault, for enable
“
OFF
”
de-energized.
Relays K2
•
Connection of the
fl
oating contacts of relay
“
K2
”
to the terminals 21, 24, 22.
•
“
K2 Function
”
factory setting:
|
2K
|
=
Fault indication
. I.e. energized for operation without fault and
for enable
“
OFF
”
.
5.15
Communication
5.15.1
Networking via MODBUS-RTU
The device comes equipped with a RS-485 interface for networking via MODBUS. Conntection at:
“
A
(D+)
”
,
“
B (D-)
”
and
“
GND
”
.
The address must be set in the
“
IO Setup
”
menu.
Information
A maximum of 64 participants can be directly connected to one another, and another 64 participants
via a repeater.
5.15.2
RS-485 - network design and interface parameter
Please ensure the correct connection; i.e. "A (D+)" must always be connected to "A (D+)" of the next
devices. The same applies to "B (D-)" .
In addition, a "GND" connection must be established, as dissimilar potential (over 10 V!) will lead to
the destruction of the RS-485 interface (e.g. lightning).
general example for MODBUS device connection
The data line must be connected from one device to the next. No other type of wiring is allowed!
Always use only two wires of one lead (twisted pair) for the connection.
Operating Instructions
Icontrol
–
model series FXDM
Electrical installation
L-BAL-E036-GB 2022/47 Index 011
Part.-No.
21/108