清倉、現貨、物有所值KFA5-SR2-EX1.W原裝Release date 2012-09-19 14:52 Date of issue 2012-09-19 103371_eng.xml
KFA5-SR2-Ex1.W
Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in Germany
Pepperl+Fuchs Group • .: Germany +49-621-776-0 • USA +1-330-4253555 • Singapore +65-67-799091 • Internet www.pepperl-fuchs.com 1
Switch Amplifier
2+
3-
1+
Zone 0, 1, 2
Div. 1, 2
KFA5-SR2-Ex1.W
789
14 115 V AC
15
10 kΩ
10 kΩ
400 Ω ≤ R ≤ 2 kΩ
Connection
Assembly
• 1-channel isolated barrier
• 115 V AC supply
• Dry contact or NAMUR inputs
• Relay contact output
• Line fault detection （LFD）
• Reversible mode of operation
• Up to SIL2 acc. to IEC 61508/IEC 61511
Function
This isolated barrier is used for intrinsic safety applications. It
transfers digital signals （NAMUR sensors/mechanical
contacts） from a hazardous area to a safe area.
The proximity sensor or switch controls a form C changeover
relay contact for the safe area load. The barrier output
changes state when the input signal changes state. The
normal output state can be reversed using switch S1.
Switch S3 is used to enable or disable line fault detection of
the field circuit.
During an error condition, the relay reverts to its de-energized
state and the LEDs indicate the fault according to
NAMUR NE44.
Features