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KFD2SHEX1

Fail-Safe Amplifier

Fail-Safe Amplifier
  List Price (ex VAT): £515.77  
  Stock On Back Order  
  Order Code: KFD2SHEX1  
  Manufacturer Code: 046903  
     

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Product details


Intrinsic safety & signal conditioning

Two channel digital input switch amplifier - 20mm


This isolated barrier is used for intrinsic safety applications. The device transfers digital signals (SN/S1N proximity sensors or approved dry contacts) from a hazardous area to a safe area.

The input controls one relay contact output with 3 NO contacts (one output is in series to the both output relays for the safety function), one relay contact output with one NO contact, and one passive transistor output.

Unlike an SN/S1N series proximity sensor, a mechanical contact, requires a 10kΩ resistor to be placed across the contact in addition to a 1.5kΩ resistor in series.

Lead breakage (LB) and short circuit (SC) conditions of the control circuit are continuously monitored.

During a fault condition, the fault indication output energizes and outputs I and II de-energize.

For safety applications up to SIL3, output I must be used. For safety applications up to SIL2, output I and output II can be used.

Technical specification
Input/Output:Digital input
Channels:1
Output relay:1
Supply voltage:20-30V d.c.
Mounting:35mm DIN rail or panel mount
Ambient temperature:-20 to +60°C
Vibration resistance:acc. to EN60068-2-6,
10Hz to 150Hz, 1g, frequency
Shock resistance:acc. to EN60068-2-27,
15g, 11mS, half-sine
Protection rating:IP20
Dimensions:w40 x h107 x d115mm

Features:
  • Single channel isolated barrier
  • 24V d.c. supply (Power Rail)
  • Input for approved dry contacts or SN/S1N sensors
  • Relay output
  • Fault indication output
  • Line fault detection (LFD)
  • Up to SIL3 acc. to IEC 61508
  • Up to PL d acc. to EN ISO 13849

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