5.7
Digital inputs (D1, D2)
Different 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).
5.8
Relay outputs (K1, K2)
Various functions can be allocated to the relay outputs
“
K1
”
and
“
K2
”
(
IO Setup: function and
inverting relais outputs). Max. contact rating
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
”
.
5.9
RS-485 interfaces for MODBUS RTU
The device has two RS-485 interfaces for networking via MODBUS RTU:
1. Interface
“
1A (1D+)
”
,
“
1B (1D-)
”
for MODBUS Master applications
–
Pre-programmed function is output from control circuit 1:
|
1. Control signal (2A)
|
e.g. for activating speed controllers for fans or fans with integrated controller and MODBUS
interface (
member MODBUS Master).
The programmable functions correspond to the functions for the analogue outputs described in
the IO Setup.
–
Automatic addressing of members via a patented procedure.
It is no longer necessary to address each individual member manually in the network. The
“
ID
”
connection is also assigned (for more information
the following chapter). .
–
Integrated failsafe wiring and 150
Ω
termination.
2. Interface
“
2A (2D+)
”
,
“
2B (2D-)
”
for MODBUS Slave applications
–
Connection of the device to a superordinate building control system.
–
Setting of address and communication parameters
Programming: Menu group MODBUS
Slave.
G
N
D
2
A
(
2
D
+
)
2
B
(
2
D
-)
G
N
D
A
(
D
+
)
B
(
D
-)
CXE / CXG
MODBUS Slave
MODBUS Slave
G
N
D
1
A
(
D
+
)
1
B
(
1
D
-)
G
N
D
A
(
D
+
)
B
(
D
-)
CXE / CXG
MODBUS Master
MODBUS Slave
ID
ID
2
ID
1
13.03.2013
v_cxe_modbus_master_u_slave_anschl.vsd
Connection MODBUS Slave and MODBUS Master interface
When using telephone
fl
ex with four cable cores, we recommend the following allocation:
•
A (D+) = red
•
B (D-) = black
Operating Instructions
UNIcon MODBUS Master
Electrical installation
L-BAL-E207-GB 1723 Index 003
Part.-No.
11/114