Evco EV3K11 User Manual

EVCO S.p.A. EV3 MVC & EVD MVC | Application manual ver. 1.0 | Code 144EV3MVI104
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18 Supply tachometer (only for fast digital inputs)
19 Return tachometer (only for fast digital inputs)
100 Room probe
101 Supply probe
102 External probe
103 Discharge probe
104 Water probe
105 Compressor defrost probe
106 Compressor discharge temperature probe
107 Humidity probe (only for universal inputs IN1 and IN2)
108 CO
2
probe (only for universal inputs IN1 and IN2)
109 Remote control probe (only for universal inputs IN1 and IN2)
110 Differential pressure probe (only for universal inputs IN1 and IN2)
8.2 Analogue outputs
There are 2 analogue outputs, AO1 and AO2. The parameters I71, I72, I74 and I75 determine output type: 0-10 V, phase cutting,
PWM, frequency or disabled.
AO type
I71 - I72 - I74 - I75 parameter
values
Description
0 Disabled (or DO)
1 Phase cutting
2 0-10 V
3 PWM
4 Frequency
The choice of output type affects the unit of measurement. Frequency outputs are measured in Hz whereas phase cutting, power and
PWM outputs are measured in %.
If the heaters are driven by a solid-state relay, low-frequency PWM and live voltage can also be regulated and can be configured
(between 0 and 10 V) by parameter.
The timing of the resulting square wave (from 0 to 255 seconds) can be configured by parameter C31, while the amplitude of the
output signal is configured by parameter C32. In order to use this regulation, the output must be configured as 0-10 V. If a heater is
driven by a modulating signal of 0-10 V, parameter C31 is to be set at a 0.
Disabled (or DO)
If it is decided to disable the analogue output it can be used as DO digital output.
Phase cutting
In output a pulse of 500 us is generated, synchronised by the network 0. The delay of the pulse with respect to the zero-cross is
calculated so the value set is that of the effective load voltage: under 20% the output is always off, above 90% it is always on.
A fixed start-up time is applied of 1s when the output shifts from 0% to a different value: for this time the output is forced at 100%.
The shift value is fixed at 2.5 ms.
0-10 V
The output voltage varies according to the value set: 0% output always off, 100% output at 10 V.

Evco EV3K11 Specifications

General

Brand	Evco
Model	EV3K11
Category	Controller
Language	English