5.6
Digital inputs
“
D1
”
and
“
E1 = D2
”
In the case of use of the module AM-PREMIUM two digital inputs can be programmed. When inserting
the module the analog input
“
E1
”
becomes automatically to the second digital input
“
D2
”
.
On the printed circuit board of the basic device
D1: contact at Terminals
“
D1
”
-
“
24 V
”
D2: contact at Terminals
“
E1
”
-
“
24 V
”
Various functions can be allocated to the digital inputs
“
D1
”
and
“
D2
”
(
IO Setup: Functions summary
of the digital inputs). Activation via
fl
oating contacts (a low voltage of ca. 24 V DC is connected).
Attention!
Never apply line voltage to the digital input!
It is not permissible to connect inputs of several devices to each other!
5.7
Communication
5.7.1
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 members can be directly connected to one another, and another 63 members via a
repeater.
5.7.2
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.
Example for MODBUS connection
Operating Instructions
AM-PREMIUM(-W)
–
model series
Electrical installation
L-BAL-E095-GB 1618 Index 006
Part.-No.
10/90
