Siemens 3RS2

Note
Safe state
The basis of the safety function is the de󹪝nition of the safe state.
In the case of temperature monitoring relays, this is the "OFF state", i.e. an open contact for
sensors or shutdown of the actuators.
2.1.3 Radio interference
Radio interference
NOTICE
The 3RS2 devices, except digital devices with IO-Link 3RS2800, are certi󹪝ed as devices of
classes A (industrial environment) and B (residential environment).
The digital devices with IO-Link 3RS2800, are certi󹪝ed as class A devices. The use of these
devices can lead to radio interference in residential areas!
2.2 Standards, approvals and certi󹪝cates
Applicable standards
The temperature monitoring relays meet the requirements of the following standards:
Table 2-1 Standards ‑ monitoring relays
Device standards
• IEC / EN 60947-1 "Low-voltage switchgear and controlgear: General rules"
• IEC / EN 60947-5-1 "Control circuit devices and switching elements: Electromechanical control
circuit devices"; VDE 0660 "Low-voltage switchgear"
• DIN EN 50042 "Terminal marking"
EMC standard
• IEC / EN 61000-6-2 "Generic standard Immunity"
• IEC / EN 61000-6-4 "Generic standard emission"
Resistance to extreme cli‐
mates
• IEC 60721-3-3 "Classi󹪝cation of environmental conditions"
The monitoring relays are climate-proof according to IEC 60721-3.
Safety instructions, standards
2.2 Standards, approvals and certi󹪝cates
3RS2 temperature monitoring relay
12 Equipment Manual, 02/2022, A5E42462552002A/RS-AB/002