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ENG
230 Vac digital inputs
pRack M, L models have up to two groups of inputs powered at 230 Vac
50/60 Hz +10/-15%; each group features two inputs (see paragraph 2.2.1
for details). The groups have double insulation between them and can
have diff erent voltages.
Important: within each group the inputs must be powered at the
same voltage to avoid short-circuits or powering lower voltage
inputs at 230 Vac.
The following fi gure represents an example for connecting the 230 Vac
digital inputs on pRack models S, M, L.
J19
3.4.1
Remote connection of the digital inputs
Important note: do not connect other devices to the digital inputs
IDn inputs.
The Sizes of the cables for the remote connection of the digital inputs are
shown in the following table:
Size (mm
2
) for length up to 50 m
0,25
If the product is installed in industrial environments (application of the EN
61000-6-2 standard) the length of the connections must be less than 30 m.
This length shouldn't be exceeded in any case, to avoid measurement errors.
3.5 Connecting the analogue outputs
3.5.1
Connecting 0...10 V analogue outputs
The pRack PR300T provides 0...10 V optically-isolated analogue outputs,
powered externally at 24 Vac/Vdc. The fi gure below shows the electrical
connection diagram; the 0V (zero) of the power supply is also the
reference for the output voltage:
V
out
V
out
V
out
V
out
24 Vac/Vdc
0 V
Hardware Version
Terminals
S, M
Y1, Y2, Y3, Y4
L
Y1, Y2, Y3, Y4, Y5, Y6
Copyright HPL March 2021
pRack PR300T +0300018EN rel. 1.5 - 02.05.2017
J20
Fig. 3.i
Size (mm
2
) for length until 100 m
0,5
J20
V
out
V
out
Fig. 3.j
Reference
VG0
VG0
Tab. 3.i
3.5.2
Optional modules
Module for converting a PWM analogue output to a liner 0...10 V
and 4...20 mA analogue output (code CONV0/10A0)
The module is used to convert a PWM output (5 V pulses) to a liner 0...10
V and 4...20 mA analogue output (code CONV0/10A0). The control Signal
(at the input terminals optically-isolated from the rest of the module)
must have a maximum amplitude of 5V and a period between 8 ms and
200 ms. The 0...10 V output voltage can be connected to a maximum
load of 2 kΩ, with a maximum ripple of 100 mV.
The 4...20 mA current output can be connected to a maximum load of
280 Ω, with maximum overshoot of 0.3 mA.
The mechanical dimensions of the module are 87x36x60 mm (2 DIN
modules) with IP20 index of protection.
Module for converting a 0...10 V analogue output to an SPDT
digital output (code CONVONOFF0)
The module is used to convert a 0...10 V analogue output to an ON/OFF
relay output. The control Signal (at the input terminals, optically-isolated
from the rest of the module), to ensure the switching of the relay from OFF
to ON, must have a maximum amplitude of 3.3 V. The relay is SPDT, with
max current of 10 A and max inductive load of 1/3 HP. The mechanical
dimensions of the module are 87x36x60 mm (2 DIN modules) with IP20
index of protection.
3.6 Connecting the digital outputs
3.6.1
Electromechanical relay digital outputs
The pRack PR300T features digital outputs with electromechanical relays.
For ease of installation, the common terminals of some of the relays have
been grouped together. The following fi gure illustrates a connection
example. If the following this diagram is used, the current at the common
terminals must not exceed the rating (nominal current) of a single
terminal (8 A).
The relays are divided into groups, according to the degree of insulation.
Inside each group, the relays have just basic insulation and thus must have
the same voltage (generally 24V ac or 110 to 230 Vac).
Between the groups there is double insulation and thus the groups can
have diff erent voltages. There is also double insulation from the rest of the
controller.
Changeover outputs
Some relays feature changeover outputs, the number of changeover
outputs depends on whether or not there are solid state relays (SSR) and
consequently varies depending on the models.
Changeover relay reference,
Hardware Version
without SSR model
PRK30T**F* models
S
8
M
8, 12, 13
L
8, 12, 13, 14, 15
PRK30T**E* models
S
-
M
8, 13
D
8, 13
L
6
24
Page 73 of 169
Fig. 3.k
Terminal
J15
J15, J17, J18
J15, J17, J18, J21
-
J15, J18
Tab. 3.j
P4367 Rev 01
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