Instrumentation info

P&F Barrier -

KCD2-SR-Ex2.SP - Switch Amplifier

Used for:

• This is an isolated barrier is used for intrinsic safety applications.
• The device transfers digital signals from NAMUR sensors or dry contacts from the hazardous area to the non-hazardous area.
• useful for detecting positions, end stops, and switching states.
• The device output changes the state when the input signal changes the state.

Decoding:

KCD2-SR-Ex2.SP
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K: K-System
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C: Version with removable terminal blocks, 12.5 mm width
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D: DC power supply
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2: 24 V
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SR: Switch amplifier with relay output
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-
Ex: Isolated Barriers, not applicable to Signal Conditioners
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2: Number of channels
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.
SP:Special function, if available
 

Notes:

• 2-channel
• Dry contact or NAMUR inputs (Signal type Digital Input)
• Relay contact outputs
• Supply  Connection either from Power Rail or terminals 9+, 10-
• Line fault detection (LFD)
• Via DIP switches the mode of operation of can be reversed  and the line fault detection can be switched off.
• Supply: Connection Power Rail (or) terminals 9+, 10-
• Supply Rated voltage Ur 19-30 V DC
• Rated current Ir ≤ 30 mA
• Input
  Connection terminals 1+, 2-; 3+, 4-
  Open circuit voltage/short-circuit current approx. 10 V DC / approx. 8 mA
  Switching point/switching hysteresis 1.2 - 2.1 mA / approx. 0.2 mA
  Line fault detection breakage I ≤ 0.1 mA , short-circuit I ≥ 6.5 mA
• Output
  Connection terminals 5, 6; 7, 8
  Output I signal ; relay
  Output II signal ; relay
  Minimum switch current 2 mA / 24 V DC
• Ambient temperature -20 - 60 °C

Joystick - Buttons - Internals (Example)

Make:  

W. GESSMANN GmbH, Germany

IO's:

Push Buttons: 6 (Front) + 1 (Back)

Lever button (Deadman switch) : 1

Potentiometers(POT) : 2 (N-S Direction & E-W Direction)

Microswitches :4 ( At the start of each direction North, South, East, West)

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DI's : 6 + 1 + 1 + 4 = 12

AI's: 2 (POT's Resistances)

Total IO's : 14

Generally used "Barriers":

For

DI's: KCD2-SR-Ex2.SP-Switch Amplifier

AI's:  KFD2-PT2-Ex1-5-Potentiometer Converter

Internals: (Sample for Understanding)

Wiring Connections with Barriers (Example):

P&F Barrier -

KFD2-PT2-Ex1-5 - Potentiometer Converter

Used for:

• This is an isolated barrier is used for intrinsic safety applications.
• It provides the source voltage to a potentiometer and transfers its wiper position from hazardous areas to safe areas.
  It then converts the signal to a 4 mA - 20mA current output.
• The unit can be used in a 3-, 4-, or 5-wire configuration depending on the required measurement accuracy. 
• The barrier’s potentiometer can be used to compensate for lead resistance up to 5 % of the hazardous area potentiometer value.
• Lead resistance compensation adjustment

Decoding:

KFD2-PT2-Ex1-5
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K: K-System
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F: Version with removable terminal blocks, 20 mm or 40 mm width
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D: DC power supply
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2: 24 V
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PT: Potentiometer converter
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-
Ex: Isolated Barriers, not applicable to Signal Conditioners
------------------
1: Number of channels
 

Notes:

• 1-channel
• Signal type Analog input
• Supply  Connection either from Power Rail (or) terminals 11+, 12-
• Rated voltage Ur 20-35 V DC
• Input
  Potentiometer input
  Connection terminals 4-, 5-, 3+, 2+, 1+
  Types of measuring 3-, 4-, 5-wire technology
  Nominal resistance 800 Ω to 100 kΩ
  Supply voltage approx. 4.7 V
  Lead resistance 5 % of the potentiometer resistance (adjustable)
• Output
  Current output 4 mA-20 mA
  Connection terminals 7-, 8+
• Indicators/settings
  Control elements potentiometer
  Configuration via potentiometer
• Ambient temperature: -20 - 60 °C

in 3-wire configurations

Jumpers must be used on terminals 1, 2 and 4, 5 .

in 4-wire connections.

A jumper must be used between terminals 4 and 5

In the 5-wire mode of operation

the potentiometer voltage is measured at terminals 2 and 5 and automatically readjusted.

Front side potentiometer

can be used to compensate for lead resistances up to 5 % of the potentiometer value

During adjustment, the potentiometer is set to 100 % of its value and the output signal is adjusted to 100 % of the required value. This adjustment can be repeated setting the potentiometer to 0 %.

Accessories (some of them are)

• K-250R Measuring resistor 
• K-500R0%1 Measuring resistor
  
  This resistor can be used to convert 0-20 mA to 0-5 V. 
  Precision resistor.