INSTRINSIC SAFETY BARRIER

1-channel isolated barrier
• 24 V DC supply (loop powered)
• Current limit 45 mA at 10 V DC
• Up to SIL 3 acc. to IEC 61508 This isolated barrier is used for intrinsic safety applications. The device supplies power to solenoids, LEDs and audible alarms located in a hazardous area. The device is loop powered, so the available energy at the output is received from the input signal. The output signal has a resistive characteristic. As a result the output voltage and current are dependent on the load and the input voltage At full load, 10 V at 45 mA is available for the hazardous area application

1-channel
• Output EEx ia IIC
• 24 V DC nominal supply voltage
• Device installation permissible in zone 2
• Conversion of current/voltage or voltage/current
• Elevation/Suppression of the "life zero"
• Accuracy 0.1 %
• EMC acc. to NAMUR NE 21 KFD2-CD-Ex1.32
The KFD2-CD-Ex1.32 transmits an electrical unit signal from the safe area to the hazardous area. The conversion of a current signal into a voltage signal and vice versa is possible. Current input option A current limit circuit in series to terminal 9 protects the device from damage. The max. voltage drop at the input is DC 4 V, allowing for the connection of several KFD2-CD32-Ex1.32 repeaters due to the low voltage drop in order to maintain multiple galvanically isolated outputs (signal duplication). Voltage input option The signal is transmitted to terminals 9 and 10 across an amplifier and the DC/DC converter within the allowable voltage range. A voltage limiter circuit protects the amplifier from incorrect input switching and overvoltage, but will draw current through a 50 mA fuse during operation. The fuse can be changed only by the manufacturer. Current output option The open circuit voltage is DC 24 V within the allowable supply voltage range at terminals 1 and 2. The max. load that can be applied is 850 ???. Voltage output option At least 20 mA is available within the allowable supply voltage range at terminals 1 and 2 which means that with 10 V output voltage, a load of at least 500 ??? must be connected
Used to drive I/P converters and valve positioners. Table: input/output options, type For options enclosed in parantheses, the transfer range for a base type is only partially used, i. e. 4 mA ... 20 mA from the base type 0 mA ... 20 mA.

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Zener barriers are a cost-eff ective solution for providing an intrinsically safe interface with field devices located in the hazardous area. As part of the intrinsic safety barrier family, Pepperl+Fuchs off ers two distinct zener barrier systems. The Z-System barriers are 12.5 mm wide and mount and ground directly to standard 35 mm DIN rail, while the SB-System barriers are the only termination board solution with pluggable modules available on the market. In addition to this wide product portfolio of housing and connection styles, we off er accessories for each application.

KCD2-SON-Ex1.R1 Switch Amplifier1-channel isolated barrier, 24 V DC supply (Power Rail), Dry contact or NAMUR input, 2 passive transistor outputs (resistive), Application-specific outputs, Line fault transparency (LFT), Usable as signal splitter (1 input and 2 outputs), Housing width 12.5 mm, Up to SIL 2 acc. to IEC 61508
KCD2-SON-Ex1.R2 Switch Amplifier1-channel isolated barrier, 24 V DC supply (Power Rail), Dry contact or NAMUR input, Application-specific outputs, Usable as signal splitter (1 input and 2 outputs), 2 passive transistor outputs (resistive), Line fault transparency (LFT), Housing width 12.5 mm, Up to SIL 2 acc. to IEC 61508
KCD2-SON-Ex1.R3 Switch Amplifier1-channel isolated barrier, 24 V DC supply (Power Rail), Dry contact or NAMUR input, Application-specific outputs, Usable as signal splitter (1 input and 2 outputs), 2 passive transistor outputs (resistive), Line fault transparency (LFT), Housing width 12.5 mm, Up to SIL 2 acc. to IEC 61508
KCD2-SON-Ex2 Switch Amplifier2-channel isolated barrier, 24 V DC supply (Power Rail), Dry contact or NAMUR inputs, 2 passive transistor outputs (resistive acc. to EN 60947-5-6), Line fault transparency (LFT), Housing width 12.5 mm, Up to SIL 2 acc. to IEC 61508
KCD2-SON-Ex2.R1 Switch Amplifier2-channel isolated barrier, 24 V DC supply (Power Rail), Dry contact or NAMUR inputs, 2 passive transistor outputs (resistive), Application-specific outputs, Line fault transparency (LFT), Housing width 12.5 mm, Up to SIL 2 acc. to IEC 61508
KCD2-SON-Ex2.R2 Switch Amplifier2-channel isolated barrier, 24 V DC supply (Power Rail), Dry contact or NAMUR inputs, Application-specific outputs, 2 passive transistor outputs (resistive), Line fault transparency (LFT), Housing width 12.5 mm, Up to SIL 2 acc. to IEC 61508

KCD2-SON-Ex2.R3 Switch Amplifier 2-channel isolated barrier, 24 V DC supply (Power Rail), Dry contact or NAMUR inputs, Application-specific outputs, 2 passive transistor outputs (resistive), Line fault transparency (LFT), Housing width 12.5 mm, Up to SIL 2 acc. to IEC 61508 KCD2-SOT-Ex2.SP Switch Amplifier 2-channel isolated barrier, 24 V DC supply (Power Rail), Dry contact or NAMUR inputs, 2 passive transistor outputs, Reversible mode of operation, Line fault detection (LFD), Housing width 12.5 mm, Connection via spring terminals with push-in connection technology, Up to SIL 2 acc. to IEC 61508 KCD2-SR-Ex1.LB.SP Switch Amplifier 1-channel isolated barrier, 24 V DC supply (Power Rail), Dry contact or NAMUR inputs, Usable as signal splitter (1 input and 2 outputs), Relay contact output, Fault relay contact output, Line fault detection (LFD), Housing width 12.5 mm, Connection via spring terminals with push-in connection technology, Up to SIL 2 acc. to IEC 61508 KCD2-SR-Ex2.SP Switch Amplifier 2-channel isolated barrier, 24 V DC supply (Power Rail), Dry contact or NAMUR inputs, Relay contact output, Line fault detection (LFD), Housing width 12.5 mm, Connection via spring terminals with push-in connection technology, Up to SIL 2 acc. to IEC 61508

ISOLATED BARRIERS  DIN RAIL MOUNTED
K-System isolated barriers guarantee safe, reliable, and effi cient signal transmission between your fi eld device and the control system. In addition to their inherent power limitation, these modules feature galvanic isolation between the signal loop and all other power loops. Pepperl+Fuchs off ers the most complete range of products to meet all your application and installation requirements.

KCD2-ST-Ex1.LB Switch Amplifier1-channel isolated barrier, 24 V DC supply (Power Rail), Dry contact or NAMUR input, 2 active transistor outputs, Usable as signal splitter (1 input and 2 outputs), Reversible mode of operation, Line fault detection (LFD), Housing width 12.5 mm, Up to SIL 2 acc. to IEC 61508
KFA4-SR2-Ex1.W Switch Amplifier1-channel, Control circuit EEx ia IIC, Reversible mode of operation, 1 relay contact output (change-over contact), EMC acc. to NAMUR NE 21, LB/SC monitoring, Up to SIL 2 acc. to IEC 61508/IEC 61511
 KFA4-SR2-Ex1.W.LB Switch Amplifier1-channel, Control circuit EEx ia IIC, Reversible mode of operation, Output I: relay contact output (change-over contact), Output II: optionally signal output/fault signal, EMC acc. to NAMUR NE 21, LB/SC monitoring, Up to SIL 2 acc. to IEC 61508/IEC 61511
KFA4-SR2-Ex2.W Switch Amplifier2-channel, Control circuit EEx ia IIC, Reversible mode of operation, 1 relay contact output (change-over contact) per channel, EMC acc. to NAMUR NE 21, LB/SC monitoring, Up to SIL 2 acc. to IEC 61508/IEC 61511
 KFA5-DU-Ex1.D Switch Amplifier, Timer Relay1-channel isolated barrier, 115 V AC supply, Dry contact or NAMUR inputs, Relay contact and transistor output, Adjustable output timer functions from 10 ms ... 60 min, Input frequency up to 80 Hz; pulse divider up to 1 kHz, Reset function, Configurable by keypad, Line fault detection (LFD)
 KFA5-SR2-Ex2.W.IR Switch Amplifier2-channel isolated barrier, 115 V AC supply, Dry contact or NAMUR inputs, Latching relay contact output, Line fault detection (LFD)
KFA6-DU-Ex1.D Switch Amplifier, Timer Relay1-channel isolated barrier, 230 V AC supply, Dry contact or NAMUR inputs, Relay contact and transistor output, Adjustable output timer functions from 10 ms ... 60 min, Input frequency up to 80 Hz; pulse divider up to 1 kHz, Reset function, Configurable by keypad, Line fault detection (LFD)
KFA6-ER-Ex1.W.LB Conductivity Switch Amplifier1-channel isolated barrier, 230 V AC supply, Level sensing input, Adjustable range 1 k.150 k, Relay contact output, Fault relay contact output, Adjustable time delay up to 10 s, Minimum/maximum control, Line fault detection (LFD)
KFA6-SR2-Ex2.W.IR Switch Amplifier2-channel isolated barrier, 230 V AC supply, Dry contact or NAMUR inputs, Latching relay contact output, Line fault detection (LFD)
 KFD2-DU-Ex1.D Switch Amplifier, Timer Relay1-channel isolated barrier, 24 V DC supply (Power Rail), Dry contact or NAMUR inputs, Relay contact and transistor output, Adjustable output timer functions from 10 ms ... 60 min, Input frequency up to 80 Hz; pulse divider up to 1 kHz, Reset function, Configurable by keypad, Line fault detection (LFD)

KFD2-ELD-Ex16 Ground Fault Detection 16-channel isolated barrier, 24 V DC supply (Power Rail), Analog or digtial field device inputs, Monitors leakage current, Fault relay contact output, LED status indication, Test circuit for validation, Parallel connection for easy integration, Conformal coating KFD2-SOT3-Ex1.LB.IO Switch Amplifier 1-channel isolated barrier, 24 V DC supply (Power Rail), Dry contact or NAMUR inputs, Usable as signal splitter (1 input and 2 outputs), Isolated passive transistor output, non-polarized, Isolated passive fault output, non-polarized, Line fault detection (LFD), Reversible mode of operation, Up to SIL 2 acc. to IEC 61508