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: [phone], Telefax: [phone], E-Mail: [e-mail]

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: [phone], Telefax: [phone], E-Mail: [e-mail]

NSG-D-2-130-2005-10

Electronic Monitoring Relays

Thermistor monitoring

S1M0

Connection example

L1
L2
L3

1L1

(1L+)

U

B

S2

F2

11 21

A1

X1

T1

X2

S1M0

K2

1L2

(1L-)

PE

12 14 T2

22 24 A2

K2

S2

K2

H1

0V

M1

UVW

M 3 AC

J JJ

4

Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]

NSG-D-2-130-2005-10

4

Electronic Monitoring Relays

Thermistor monitoring

S1M0

General Details

Unless stated otherwise in the technical details for the specific unit.

Electrical data

AC frequency range 50 ... 60 Hz
DC residual ripple 160 %
Contact material AgCdO
Continuous duty 100 %

Environmental data

EMC EN 60947-5-1, EN 61000-6-2
Vibration in accordance with EN 60068-2-6
Frequency: 10 ... 55 Hz,
Amplitude: 0.35 mm
Climatic suitability EN 60068-2-78
Airgap creepage EN 60947-1, EN 60079-15
Ambient temperature -10 ... +55 °C
Storage temperature -40 ... +85 °C

Mechanical data

Torque setting for connection terminals
(screws) 0.6 Nm
Mounting position Any
Housing material
Front ABS UL 94 V0
Housing PPO UL 94 V0
Protection types
Mounting: IP 54
Housing: IP 40
Terminals: IP 20
The version of the standards current at 2005-10 apply.

Order references key

UB Supply voltage

Order reference

Type U

S1M0 24 V AC/DC 839 600
S1M0 48 V AC 839 620
S1M0 110 V AC 839 630
S1M0 230 V AC 839 650
S1M0 240 V AC 839 655
S1M0 400 V AC 839 660

Additional versions available on request

B

Order no.

Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]

NSG-D-2-130-2005-10