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The Switch Amplifier is a versatile 2-channel signal conditioner designed for use in hazardous environments. It supports a 24 V DC supply and accommodates both dry contact and NAMUR inputs, making it suitable for various industrial applications.
The Switch Amplifier is a crucial component in the family of intrinsic safety barriers developed by Pepperl+Fuchs, designed for use in potentially explosive atmospheres. This device is engineered to ensure safety by isolating the field circuit from the control system, providing reliable signal conditioning and enhancing system integrity.
Common applications include process automation and control systems where reliable signal transmission is essential. The product features a dual-channel architecture, allowing it to function as a signal splitter, and is equipped with two relay contact outputs that operate using AND logic. Additionally, the line fault detection (LFD) feature enhances system safety by monitoring for circuit integrity. With compliance to SIL 2 according to IEC 61508/IEC 61511, the Switch Amplifier is suitable for use in safety-critical applications.
| Connection side | control side |
| Mechanical life | 108 switching cycles |
| Configuration | via DIP switches |
| Energized/De-energized delay | approx. 20 ms / approx. 20 ms |
| Signal type | Digital Input |
| Power consumption | < 1.3 W |
| Open circuit voltage/short-circuit current | approx. 8 V DC / approx. 8 mA |
| Power dissipation | 1 W |
| Rated voltage | 20 … 30 V DC |
| Dimensions | 20 x 119 x 115 mm (0.8 x 4.7 x 4.5 inch) , housing type B2 |
| Pulse/Pause ratio | min. 20 ms / min. 20 ms |
| Output I, II, III, IV | channel 1, 2; relay |
| Mounting | on 35 mm DIN mounting rail acc. to EN 60715:2001 |
| Input/input | not available |
| Safety Integrity Level (SIL) | SIL 2 |
| Connection | output I: terminals 7, 8 ; output II: terminals 8, 9 ; output III: terminals 10, 11 ; output IV: terminals 11, 12 |
| Connection | screw terminals |
| Ambient temperature | -20 … 60 °C (-4 … 140 °F) |
| Supplementary information | Observe the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see www.pepperl-fuchs.com. |
| Connection | terminals 1+, 2+, 3-; 4+, 5+, 6- |
| Labeling | space for labeling at the front |
| Collective error message | Power Rail |
| Switching point/switching hysteresis | 1.2 … 2.1 mA / approx. 0.2 mA |
| Output/power supply | basic insulation according to IEC/EN 61010-1, rated insulation voltage 32 Veff , functional insulation, rated insulation voltage 50 Veff |
| Ripple | ≤ 10 % |
| Line fault detection | breakage I ≤ 0.1 mA , short-circuit I > 6 mA |
| Display elements | LEDs |
| Optional accessories | – power feed module KFD2-EB2(.R4A.B)(.SP) – universal power rail UPR-03(-M)(-S) – profile rail K-DUCT-GY(-UPR-03) |
| Rated current | ≤ 50 mA |
| Degree of protection | IP20 |
| Electromagnetic compatibility | NE 21:2006 |
| Contact loading | 50 V AC/1 A/cos φ > 0.7; 40 V DC/1 A resistive load |
| Input/power supply | reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff |
| Switching frequency | ≤ 10 Hz |
| Control elements | DIP-switch |
| Connection | Power Rail or terminals 14+, 15- |
| Output/Output | basic insulation according to IEC/EN 61010-1, rated insulation voltage 32 Veff , functional insulation, rated insulation voltage 50 Veff |
| Minimum switch current | 1 mA / 24 V DC |
| Degree of protection | IEC 60529:2001 |
| Mass | approx. 150 g |
| Input/Output | reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff |
| Connection side | field side |
| Rated values | acc. to EN 60947-5-6 (NAMUR) |
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