Pilz S1M0 Data Sheet
Electronic Monitoring Relays
Thermistor monitoring
S1M0
The S1M0 thermistor monitoring
relay is used in temperature
monitoring circuits in accordance
with EN 44081 to protect motors,
generators, storage areas etc from
overheating.
Features
● For DC and AC supplies
● Normally energised mode
● Monitors sensor short-circuits
● Non-volatile fault latching
● Manual reset via internal or
external reset button
Approvals
S1M0
●
●*
●
* for versions up to 240 V AC
Technical Details
Electrical data
Supply voltage
Tolerance
Power consumption
Usage category in accordance
with EN 60947-4-1
EN 60947-5-1
Output contacts
Contact material
Contact fuse protection in accordance with
EN 60947-5-1
Blow-out fuse quick acting
Blow-out fuse slow acting
Safety cut-out, 24 V AC/DC
characteristic B/C
Measuring circuit
Response value for sensor short-circuit
Delay on energisation
Response value
Release value
Resistance at 20 °C
Mechanical data
Max. cable cross section of ext. conductor
single core
multi-core with crimp connectors
Dimensions (H x W x D)
Weight
Designation
Description
The thermistor monitoring relay is
enclosed in an S-95 slimline housing.
There are 5 AC versions and one
version and AC/DC operation.
Features:
● Relay outputs: 2 auxiliary contacts
(2 C/O)
●
Measuring circuit for connecting a
temperature sensor (PT resistance)
● Monitoring temperature sensor
for short circuits
● Reset button
● Connection option for external
reset button
●
Manual reset with non-volatile reset
latch
● LEDs for supply voltage and fault
S1M0
AC: 48, 110, 230, 240, 400 V
AC/DC: 24 V
-15 %/+10 %
AC: 3.5 VA, DC: 2 W
AC1: 240 V/0.1 ... 5 A/1200 VA
DC1: 24 V/0.1 ... 5 A/120 W
AC15: 230 V/2 A; DC13: 24 V/1.5 A
2 auxiliary contacts (2 C/O)
AgCdO, 3 µm gold plating for low-load
range 1-50 V/1-100 mA
6 A
4 A
4 A
Approx. 25 Ohm
Approx. 500 ms
3.6 kOhm ± 10 %
1.8 kOhm± 10 %
Max. 1.5 kOhm
1 x 4 mm2, 24 - 10 AWG
2 x 2,5 mm2, 24 - 14 AWG
87 x 22.5 x 121 mm
AC: 160 g; DC: 120 g
II (3) G/D [EEx nL] IIC
A temperature sensor is connected to
the S1M0 measuring circuit. If the
temperature exceeds a defined value,
i.e. the resistance of the temperature
sensor reaches the response value, the
output contacts switch. Contacts 11-14
and 21-24 open, contacts 11-12 and
21-22 close. If the temperature then
begins to fall, i.e. the resistance of the
temperature sensor reaches the release
value, the device can only be switched
on again by pressing the reset button
S1 (or the external reset button). The
non-volatile reset latch prevents the
device from automatic start-up
following a loss/return of the supply
voltage.
4
Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: pilz.gmbh@pilz.de
NSG-D-2-130-2005-10
Electronic Monitoring Relays
Thermistor monitoring
S1M0
Internal wiring diagram
U
B
A2
A1
(-)
(+)
~
G1
=
Timing diagram
+
U
B
R
th
R
on
R
off
J
> NAT
F1
T2
Measuring circuit
S1
T1/X1
Reset circuit
K2
Reset circuit
121422 24
K1
K1
X2
11 21
4
Reset
Reset
11-14, 21 - 24
UBSupply voltage
RonResponse value
R
Release value
off
RthPTC resistance
1
0
Latching
Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: pilz.gmbh@pilz.de
NSG-D-2-130-2005-10
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