Siemens 3RS2

initinit
K1
K2
A1/A2
initinit
K1
K2
ϑ1
ϑ2
hyst .
hyst.
A1/A2
ϑ1
ϑ2
hyst .
hyst .
initinit
K1
K2
A1/A2
ϑ2
ϑ1
hyst.
hyst .
A1/A2
ϑ2
ϑ1
hyst .
hyst.
initinit
K1
K2
ϑ1>ϑ2
ϑ1<ϑ2
reset
reset
reset
reset
DEV.MODE = TB/ATEX
MON.MODE = Over
DEV.MODE = TB/ATEX
MON.MODE = Under
1 1
2
2
1 1
2
2
1
1
1
2
2
1 1
2
2
2
11C/14NO
11C/12NC
11C
14NO12NC 11C
14NO 12NC
K1
21C/24NO
21C/22NC
K2
21C
24NO22NC
24NO 22NC
21C
Figure 5-3 Temperature limiter time diagram
11C/14NO
11C/14NO
A1/A2
init
K1
ϑ1
hyst
A1/A2
ϑ1
hyst.
init
K1
DEV.MODE = TB/ATEX
MON.MODE = Over
DEV.MODE = TB/ATEX
MON.MODE = Under
reset
reset
1 1 1 1
Figure 5-4 Temperature limiter safety function time diagram
Digital devices
5.4 Special functions
3RS2 temperature monitoring relay
Equipment Manual, 02/2022, A5E42462552002A/RS-AB/002 29