Siemens 3RS2

A1/A2
init
K1
ϑ1
hyst.
11C/14NO
1 1
A1/A2
ϑ1
hyst .
K1
11C/14NO
init
1 1
DEV.MODE = TW
MON.MODE = Over
DEV.MODE = TW
MON.MODE = Under
Figure 5-6 Temperature monitor safety function time diagram
5.4.4 Communication
The communication between the digital basic unit and the sensor expansion module is wireless
by means of an infrared interface integrated in both devices.
5.5 Performance characteristics
• Digital basic unit: 3RS2600
• Digital basic unit with IO-Link: 3RS2800 (see Digital devices with IO-Link (Page 49))
• Sensor expansion module: 3RS2900
Table 5-1 Performance features of digital devices
Performance feature 3RS2600, 3RS2800 3RS2600 + 3RS2900, 3RS2800 + 3RS2900
Adjustable Yes Yes
Connectable sensor type
• Thermocouple
• Resistance sensor (two-wire and
three-wire measurement)
• Thermistor
• Thermocouple
• Resistance sensor (two-wire and three-
wire measurement)
• Thermistor
• Analog input 4 mA ... 20 mA
Resistance sensor (see also Resist‐
ance sensors (Page 69))
• Pt100/PT1000
• KTY83/KTY84
• NTC
3)
• Pt100/Pt1000
• KTY83/KTY84
• NTC
3)
Thermocouple (see also Thermocou‐
ples (Page 67))
• Type J
• Type K
• Type T
• Type E
• Type N
• Type S
• Type R
• Type B
• Type J
• Type K
• Type T
• Type E
• Type N
• Type S
• Type R
• Type B
Digital devices
5.5 Performance characteristics
3RS2 temperature monitoring relay
Equipment Manual, 02/2022, A5E42462552002A/RS-AB/002 31