Product Description; Function - Pepperl+Fuchs SJ2-SN Manual

Functional Safety SJ2-SN, SJ3,5-S(1)N

Product Description

2 Product Description
2.1

Function

General
The device is an inductive slot sensor. Inductive slot sensors consist of a two coil system
sensing across the slot opening.
The device is a NAMUR safety sensor in 2-wire technology. The device transmits the analog
signal according to NAMUR to a connected control unit. A control unit can,
e. g., be a switch amplifier or an I/O card in a PLC.
In safety applications up to SIL 2, the device must be operated on a control unit according
to EN 60947-5-6 (NAMUR). Observe the limitations, see chapter 3.2.
In safety applications up to SIL 3, the device must be operated on a control unit
for SIL 3 safety applications. Pepperl+Fuchs offers control units for SIL 3 safety applications,
i. e. switch amplifier KFD2-SH-Ex1. Observe the limitations, see chapter 3.2.
SJ2-SN
The sensor has NC function (normally-closed). The device is in high impedance state
when the measuring plate is inside of the slot.
The sensor is qualified for safety functions in a temperature range from -40 °C to +100 °C.
The sensor has a slot width of 2 mm.
SJ3,5-SN
The sensor has NC function (normally-closed). The device is in high impedance state
when the measuring plate is inside of the slot.
The sensor is qualified for safety functions in a temperature range from -40 °C to +100 °C.
The sensor has a slot width of 3.5 mm.
SJ3,5-S1N
The sensor has NO function (normally-open). The device is in high impedance state
when the measuring plate is outside of the slot.
The sensor is qualified for safety functions in a temperature range from -25 °C to +100 °C.
The sensor has a slot width of 3.5 mm.
Note
See corresponding datasheets for further information.
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