XPSAC3421P SQUARE D, XPSAC3421P Datasheet - Page 249

• Manufacturer Part Number: XPSAC3421P
• Description: SAFETY RELAY 300V 2.5A PREVENTA
• Manufacturer: SQUARE D

Specifications of XPSAC3421P

• Contact Current Max: 60mA
• Contact Voltage Ac Nom: 115V
• Contact Configuration: 3NO
• Relay Mounting: DIN Rail
• External Height: 66mm
• External Width: 114mm
• External Depth: 22.5mm
• Rohs Compliant: Yes

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Operating principle
Principle:
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Characteristics:
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Safety automation system solutions
Preventa™ safety relay modules type XPSPVT
For dynamic monitoring of hydraulic valves on
linear presses
Safety module XPSPVT is specifically designed for monitoring hydraulic safety
system valves which control the movements of potentially hazardous machines.
The operating principle of this module is explained in the circuit diagram of a
hydraulic safety system for linear presses (see below).
This hydraulic safety system features a 3 position piston which controls the up and
down stroke of the operating cylinder. The circuit is equipped with a safety valve, to
complete the redundant system. This circuit must be activated to enable the up and
down stroke of the cylinder.
If either of the 2 pistons becomes defective (for example, due to a broken spring or
to oil contamination), and the valve piston shifts from its normal position towards the
open position, the XPSPVT module will detect it and prevent resumption of the
piston stroke.
Proximity sensors integrated in the valve to detect the piston positions and
connected to the XPSPVT module must be damped when the valve coils are in the
de-energized state (zero position).
The sensor circuits of the XPSPVT module are designed to allow connection of NPN
and PNP proximity sensors or sensing components. Either 2-wire or 3-wire types can
be used.
The wiring diagram on page 2/228 shows how to connect proximity sensors.
Hydraulic safety system circuit operating on a linear press.
Monitoring of valves in position 0.
(1) 3 position hydraulic valve.
(2) 2 position hydraulic valve.
References:
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Operating principle
Closing
Y1
Pump
(1)
S1
(2)
S3
P
A B
P T
A B
S2
Closing +
opening
Opening
Pressure
release valve
Y3
Y2
Wiring Diagrams:
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Pressure
release valve
Dimensions:
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