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3.3.5
Connecting 0...10 V active probes
PRack PR300T can be connected to 0...10 V sensors.
The inputs must be set for 0...10 V Signals from the user terminal or using
the default value installation procedure.
The connection diagram is shown below:
J1
out H
M
out T
+ (G)
Fig. 3.e
Hardware Version
Terminals
+VDC
S, M, L, D
GND
U1, U2, U3, U6, U7, U8,
3.3.6
Connecting the analogue inputs selected as
ON/OFF
The pRack PR300T allows some analogue inputs to be confi gured as
voltage-free digital inputs, not optically-isolated.
The inputs must be pre-confi gured as voltage-free digital inputs from the
user terminal or using the default value installation procedure.
J1
J24
Hardware Version
Terminals
BC4, BC5
S, M
U4, U5
U4, U5, U9, U10
S, M, L
U4, U5, U9, U10
Important: the maximum current available at the digital input is 5
mA (thus the rating of the external contact must be at least 5 mA). These
inputs are not optically-isolated.
3.3.7
Remote connection of the analogue inputs
The Sizes of the cables for the remote connection of the analogue inputs
are shown in the following table:
2
Size [mm
] for
Type of input
length up to 50 m
NTC
0.5
PT1000
0.75
current
0.25
voltage
0.25
If the product is installed in industrial enviroment (in compliance for
the EN 61000-6-2 standard) the length of the connections must be less
than 30m. In any case you should never exceed this length to have no
measurement errors.
Copyright HPL March 2021
J24
J2
J3
Description
power supply (any)
reference
Signal
Tab. 3.f
J2
J3
Fig. 3.f
Digital input cable
1
2
1
2
Tab. 3.g
2
Size [mm
] for
length up to 100 m
1.0
1.5
0.5
0.5
Tab. 3.h
3.4 Connecting the digital inputs
The pRack PR300T features digital inputs for connecting safety devices,
alarms, device status and remote switches. These inputs are all optically
isolated from the other terminals. They can work at 24 Vac, 24 Vdc and
some at 230 Vac for S, M, L models.
Note: separate the sensor Signal and digital input cables as much
as possible from the inductive load and power cables, to avoid
possible electromagnetic disturbance.
Important:
•
if the control voltage is drawn in parallel with a coil, fi t a dedicated RC
fi lter in parallel with the coil (the typical ratings are 100 Ω, 0.5 μF, 630 V).
•
If connecting the digital inputs to safety systems (alarms), remember
that: the presence of voltage across the contact must be the normal
operating condition, while no voltage must represent an alarm
situation. This will ensure that any interruption (or disconnection) of
the input will also be Signalled. Do not connect the neutral in place
of an open digital input. Always interrupt the phase. The 24 Vac/Vdc
digital inputs have a Resistance of around 5 kΩ.
All pRack digital inputs can be powered at 24 Vac and 24 Vdc, while for
models M, L only 230 Vac inouts are also available.
To maintain the optical isolation of the digital inputs, a separate power
supply must be used just for the digital inputs.
The connection diagrams shown in these fi gures, which while being the
more common and the more convenient, do not exclude the possibility
of powering the digital inputs independently from the power supply to
the pRack PR300T.
In any case, the inputs only have functional insulation from the rest of
the controller.
24 Vac digital inputs
The following fi gure represents an example for connecting the 24 Vac
digital inputs on pRack models S, M, L.
G
G0
24 Vdc digital inputs
The following fi gure represents an example for connecting the 24 Vdc
digital inputs on pRack models S, M, L.
24 Vdc
+
–
23
Page 72 of 169
Fig. 3.g
Fig. 3.h
P4367 Rev 01
pRack PR300T +0300018EN rel. 1.5 - 02.05.2017
ENG
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