Danfoss VLT FC 103 Programming Manual page 159

Parameter Description
This shows a typical Air Handling Unit (AHU). As can be
seen, the addition of the Analog I/O option offers the
possibility to control all of the functions from the
frequency converter, such as inlet-, return- and excaust
dampers or heating/cooling coils with temperature and
pressure measurements being read by the frequency
3 3
converter.
NOTE
The maximum current for the analog outputs 0-10 V is 1
mA.
Terminal
X42/1
X42/3
X42/5
X42/7
X42/9
X42/11
Table 3.28 Relevant Parameters
It is also possible to read the analog inputs, write to the
analog outputs and control the relays, using communi-
Terminal
Analog inputs (read)
X42/1
X42/3
X42/5
Analog outputs (write)
X42/7
X42/9
X42/11
Table 3.29 Relevant Parameters
Setting of on-board Real Time Clock.
The Analog I/O option incorporates a real time clock with
battery back-up. This can be used as back up of the clock
function included in the frequency converter as standard.
See section Clock Settings, parameter group 0-7*.
The Analog I/O option can be used for the control of
devices such as actuators or valves, using the Extended
Closed loop facility, thus removing control from the
Building Management System. See 3.16 Main Menu -
Extended Closed Loop - Group 21. There are three
independent closed loop PID controllers.
158
Parameters Terminal
Analog inputs
26-00, 26-1*
26-01, 26-2*
26-02, 26-3*
Analog outputs
26-4*
26-5*
26-6*
Parameters Terminal
Analog inputs (read)
18-30 53
18-31 54
18-32
Analog output (write)
18-33 42
18-34
18-35
MG16H102 - VLT
®
VLT Refrigeration Drive Programming Guide
NOTE
Where Live Zero Monitoring is used, it is important that
any analog inputs not being used for the frequency
controller, i.e. being used as of the Building Management
System decentral I/O, should have their Live Zero function
disabled.
Parameters
Analog inputs
53 6-1*
54 6-2*
Analog output
42 6-5*
cation via the serial bus. In this instance, these are the
relevant parameters.
Parameters
16-62
16-64
6-53
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is a registered Danfoss trademark
Terminal Parameters
Relays
Relay 1 Term 1, 2, 3 5-4*
Relay 2 Term 4, 5, 6 5-4*
Terminal Parameters
Relays
Relay 1 Term 1, 2, 3 16-71
Relay 2 Term 4, 5, 6 16-71
NOTE! The relay outputs must be enabled via
Control Word Bit 11 (Relay 1) and Bit 12
(Relay 2)