81550001 Crouzet USA, 81550001 Datasheet - Page 10

• Manufacturer Part Number: 81550001
• Description: SEQUENCER MODULES
• Manufacturer: Crouzet USA

Specifications of 81550001

• External Width: 49mm
• External Depth: 32mm
• Operating Pressure Max: 120psi
• Features: Maintained PAC Sequencer
• External Height: 51.3mm
• Operating Pressure Min: 30psi
• For Use With: Pneumatic Logic Components
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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A pneumatic 2-hand control device is used with dangerous machinery and requires the simultaneous use of both
hands to trigger and maintain machine operation. Such a device must be located outside the dangerous zone, so
that the operator cannot enter this zone before the machine has come to a complete standstill.
A pneumatic 2-hand control device is composed of 2 parts :
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Category 1 (EN 954-1) : the system should use well tried components and principles.
Category 3 (EN 954-1) : the system must be designed so that a single fault will not cause the loss of the safety
Category 4 (EN 954-1) : the system must be designed so that an accumulation of faults must not lead to a loss of
An output signal is only generated if both control actuating devices are actuated within 500 ms.
The release of a single control device interrupts the output signal, but a reset is only possible once both control
devices have been released.
Use of both hands (simultaneous actuation)
Relationship between input signals and
output signal
Cessation of the output signal
Prevention of accidental operation
Prevention of defeat
Reinitiation of the output signal
Synchronous actuation
Use of category 1 (EN 954-1)
Use of category 3 (EN 954-1)
Use of category 4 (EN 954-1)
Definition
2 manual pushbuttons which require the simultaneous use of both hands.
A pneumatic relay.
Synchronous action
Resetting the output signal
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Requirements
(conforming to EN 574)
function.
the safety function.
Products and specifications subject to change without notice.
Types of 2-hand control devices
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II
Type
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A
B
III
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C
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