KFD2-SR2-EX2.W开关量安全栅

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KFD2-SR2-EX2.W开关量安全栅特点
• 2-channel isolated barrier
• 24 V DC supply (Power Rail)
• Dry contact or NAMUR inputs
• Relay contact output
• Line fault detection (LFD)
• Reversible mode of operation
• Up to SIL2 acc. to IEC 61508

KFD2-SR2-EX2.W开关量安全栅功能
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 normal output state
can be reversed using switches S1 and S2. Switch S3 is used
to enable or disable line fault detection of the field circuit.
During an error condition, the relays revert to their deenergized
state and the LEDs indicate the fault according to
NAMUR NE44.
A unique collective error messaging feature is available when
used with the Power Rail system.

KFD2-SR2-EX2.W开关量安全栅技术参数
Signal type Digital Input
Supply
Connection Power Rail or terminals 14+, 15-
Rated voltage Un 20 ... 30 V DC
Ripple ≤ 10 %
Rated current In ≤ 50 mA
Power loss 1 W
Power consumption < 1.3 W
Input
Connection terminals 1+, 2+, 3-; 4+, 5+, 6-
Rated values acc. to EN 60947-5-6 (NAMUR)
Open circuit voltage/short-circuit current approx. 8 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 mA
Pulse/Pause ratio ≥ 20 ms / ≥ 20 ms
Output
Connection output I: terminals 7, 8, 9 ; output II: terminals 10, 11, 12
Output I, II signal, relay
Contact loading 253 V AC/2 A/cos φ > 0.7; 126.5 V AC/4 A/cos φ > 0.7; 40 V DC/2 A resistive load
Minimum switch current 2 mA / 24 V DC
Energized/De-energized delay approx. 20 ms / approx. 20 ms
Mechanical life 107 switching cycles