SIEMENS
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Siemens IC 10 · 2017
Relays
SIRIUS 3RS10, 3RS11, 3RS20, 3RS21 Temperature Monitoring Relays
Relays, analogically adjustable for 1 sensor
10
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Overview
SIRIUS 3RS analog temperature monitoring relays for 1 sensor
The 3RS10, 3RS11 analog temperature monitoring relays can be
used for measuring temperatures in solid, liquid and gas media.
The temperature is detected by the sensors in the medium, eval-
uated by the device and monitored for overshoot or undershoot.
When the threshold values are reached, the output relay
switches on or off depending on the parameterization.
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Benefits
•
All devices except for 24 V AC/DC feature electrical
separation
•
Extremely easy operation using a rotary potentiometer
•
Adjustable hysteresis
•
Adjustable working principle for devices with 2 threshold
values
•
All versions with removable terminals
•
All versions with screw terminals, many versions alternatively
with spring-type terminals
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Application
The analogically adjustable SIRIUS 3RS10, 3RS11 temperature
monitoring relays can be used in almost any application in which
temperature overshoot or undershoot is not permitted, e.g. in the
monitoring of set temperature limits and the output of alarm
messages for:
•
Motor and system protection
•
Control cabinet temperature monitoring
•
Freeze monitoring
•
Temperature limits for process variables e.g. in the packaging
industry or electroplating
•
Controlling equipment and machines such as heating, climate
and ventilation systems, solar collectors, heat pumps or warm
water supplies
•
Motor, bearing and gear oil monitoring
•
Monitoring of coolants
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Technical specifications
1)
Two-wire connection of resistance sensors with wire jumper between
T2 and T3.
Type
3RS1000,
3RS1010
3RS1100,
3RS1101
3RS1020,
3RS1030
3RS1120,
3RS1121
Auxiliary circuit
Rated operational currents
I
e
• AC-15/24 ... 250 V
A
3
• DC-13 at
-
24 V
A
1
-
125 V
A
0.2
-
240 V
A
0.1
Measuring accuracy at 20 °C ambient
temperature (T20)
Typically <
5 % of upper limit of scale
Reference point accuracy
K
--
<
5
--
<
5
Deviations due to ambient
temperature
In % of the measuring range
< 2
< 3
< 2
< 3
Hysteresis settings
• For temperature 1
%
2 ... 20 from upper limit of scale
• For temperature 2
%
5 from upper limit of scale
Sensor circuit
Typical sensor current
• PT100
mA
Typically 1
--
Typically 1
--
Open-circuit detection
No
Short-circuit detection
No
Three-wire conductor connection
1)
Yes
--
Yes
--
Enclosure
Rated insulation voltage
U
i
(pollution degree 3)
V
300
© Siemens AG 2016