• Ambient temperature and humidity limits
  –20 to +60°C continuous working
  –40 to +80°C storage 5–95% RH
  
• Leakage current
  For ‘basic’ barriers with a working voltage of 5V or more, the leakage current decreases by at least one decade per volt reduction in applied voltage below the working voltage, over two decades. For the MTL7755ac/7756ac it decreases by at least one decade for a 0.4V reduction in applied voltage.
  
• Terminations
  Removable terminals accommodate conductors up to 2.5mm 2 (13AWG). Hazardous-area terminals are identified by blue labels. Removal force >15N
  
• Mounting and earthing By 35mm Top Hat DIN rail
  
  

• Colour coding of barrier label
  Grey: non-polarised
  Red: positive polarity (MTL7706 negative to transmitter ) Black: negative polarity
  White: dummy barrier, MTL7799
• Weight
  140g approx
  

	Datasheet
Certificates available for different models by request

• Resistant to humid and corrosive atmospheres
  
• - 40°C to +70°C ambient temperature range
  
• Operates on a variety of bus protocols
  
• Wide range of input or output types, in any mix
  
• 'Hot-swapping' of modules
  
• Automatic module addressing Self-diagnostics
  
• Self-contained - no additional hardware (e.g., DIN-rail terminals)
  
• 6mm per channel effective packing density
  
• Redundant LANs and power supplies
  
• HART® pass-through
  Self-configuring-needed HART® pass-through

• ATEX EEx ia IIC
• Location of units
  Safe area
• Terminals
  Accommodate conductors of up to 2.5mm2 stranded or singlecore
• Isolation 250V rms between safe-area and hazardous-area terminals tested
  at 1500V rms min between safe and hazardous terminals
• Long term drift
  No recalibration necessary
• Maximum safe-area voltage
  Um = 250V rms or dc
• Hazardous-area connectors
  SCC01: Screw-clamp connector accommodates conductors of 14AWG max.CCH01: Crimp-contact header accommodates:CRC01 crimps for conductors of 14–20AWG, or
  CRC02 crimps for conductors of 18–24AWG

• Ambient temperature limits
  -20 to +60deg C (-6 to +140deg F) continuous working
  -40 to +80deg C (-40 to +176deg F) storage
• Mounting
  On MTL or user-supplied backplanes which in turn can be surface,
  DIN-rail or 19-inch rack mounted

• Weight
  100g approximately

	Datasheet
Certificates available for different models by request

• ATEX EEx ia IIC
  
• Connectors Each unit is supplied with signal and power connectors, as applicable. When using crimp ferrules for the hazardous and non-hazardous (safe) signal connectors the metal tube length should be 12mm and the wire trim length 14mm. For the power connectors the metal tube length should be 10mm and the wire trim length 12mm.See INM5000 for recommended ferrules.
• Isolation 250V rms between input, output and power supply terminals, tested at 1500V rms minimum between safe- and hazardous-area terminals. MTL5073, output and power supply not isolated.
• Location of units
  Safe area
• Terminals
  Accommodate conductors of up to 2.5mm2 stranded or singlecore
  

• Mounting
  On 35mm (top hat) rail to
  EN 50022–35 x 7.5; BS 5584;
  35 x 27 x 7.3 DIN 46277
• Ambient temperature limits
  -20 to +60deg C (-6 to +140deg F) operating
  -40 to +80deg C (-40 to +176deg F) storage
• Humidity
  5 to 95% relative humidity
• Weight
  110g approx (except where indicated)

	Datasheet
	ATEX Certificate

KFD2-SR2-Ex1.W
KFD2-SR2-Ex2.W
Isolated Switch Amplifier

• ATEX EEx ia IIC
• Type of protection [EEx nL]
• Explosion group IIA IIB IIC
• Voltage 10.5 V
• Current 13 mA
• Power 34 mW (linear characteristic)
• 1-channel
• Reversible mode of operation
• 1 relay output with 1 changeover contact
• EMC acc. to NAMUR NE 21
• LB/SC monitoring
• LB/SC collective error message via Power Rail
• SIL1 up to SIL3 acc. to IEC 61508
  

• ATEX EEx ia IIC
• 1- channel
• 24 V DC nominal supply voltage
• Current or Voltage output
• Accuracy 0.05%EMC acc. to NAMUR NE 21

• ATEX EEx ia IIB
• 1- channel
• Installation permissable in zone 2
• Current limit 80 mA
• Usable up to SIL3 acc. to IEC 61508
• Application: Control/supply for intrinsically safe valves, audible alarms, indicators etc. Supply of semiconductor in place of evaluation or lead breakage. If semiconductors (eg LED or LCD-units) are controlled, a parallel resistance of approx 10 kOhm directly at the consumer may be necessary
  

• ATEX EEx ia IIC
• 1- channel
• Device installation permissable in zone 2
• 24 Volts DC nominal supply voltage
• Usable up to SIL 3 acc. to IEC 61508
• IP20
• Temperature -20...60C (253-333K)
• Mass 100g