PCA 2 1000D OPERATING INSTRUCTION25055055

speed controllers are no longer controlled. This means that all
fans stop!
5.4 Digital input (D1)
Different functions can be assigned to the digital input D1(see IO
SETUP).
A voltage at terminals “1” and “2” (10...24 V DC) activates the
programmed function (note polarity - see connection diagram).
5.5 Relay outputs “K1”
The relay output “K1”can have different functions assigned to it,
see IO SETUP. Max. contact rating see technical data and con-
nection diagram.
Function fault indication (factory setting) for “K1”:
•
For operation the relay is energized, connections “13” and “14”
are bridged. For fault the relay is de-energized.
•
When switching off via enable (see IO SETUP/Digital inputs
"DI"), the relay remains energized.
5.6 RS-485 interface for MODBUS
The device comes equipped with a RS-485 interface for network-
ing via MODBUS. Conntection at: “A (D+)”, “B (D-)” and “GND”.
11.03.2014
v_am_modbus_connect.vsd
ID1 GND
A
(D+)
B
(D-)
ID2GND
A
(D+)
B
(D-)
B
(D-)
ID1 GND
A
(D+)
B
(D-)
ID2GND
A
(D+)
MODBUS
(RS-485)
MODBUS
(RS-485)
Addressing Addressing
MODBUS
(RS-485)
MODBUS
(RS-485)
Addressing Addressing
The connections for MODBUS “A (D+)”, “B (D-)” are available double on the module and are
connected with each other internally.
Information
•
You must ensure correct connection; i.e. “A (D+)” must also be
connected on the following devices to “A (D+)”. The same
applies to “B (D-)”.
•
In addition, a "GND" connection must be established, as
Operating Instructions PCA-2 1000D2 Electrical installation
L-BAL-E295-GB 1906 Index 001 Part.-No.
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