Pilz S1EN Data Sheet

Electronic Monitoring Relays

Insulation monitoring

S1EN

Technical Details S1EN

Electrical data

Supply voltage AC/DC: 24 ... 240 V
Tolerance 85 ... 110 %
Power consumption 240 V AC 5 VA, 24 V DC: 1 W
Switching capability in accordance
with EN 60947-4-1, 10/91 AC1: 240 V/0.1 ... 5 A/1200 VA

EN 60947-5-1, 10/91 AC15: 230 V/2 A; DC13: 24 V/1.5 A
Output contacts 1 auxiliary contact (C/O)
Contact material AgCdO, 3 µm gold plating for low-load

Contact fuse protection in accordance Max. 6 A quick or max. 4 A slow
with EN 60947-5-1, 10/91

Measuring circuit

The insulation monitoring relay S1EN
provides protection against insulation
faults in galvanically isolated voltage
supply networks (IT systems). It
meets the requirements of DIN EN
61557-8.

Features

● For DC and AC supplies

● Normally energised mode

● Fault latching or automatic reset

● Normal/test operation

● External reset button can be

connected

Approvals

S1EN

●

Rated mains voltage 50 kΩ version: AC/DC: 0 ... 240 V
(monitored mains) 200 kΩ version: AC/DC: 0 ... 400 V
Response value

Release value

Max. measuring current (DC)

Max. measuring voltage (DC) ± 17 V
Max. permitted external voltage (AC/DC) 50 kΩ version: 264 V

Min. impedance (AC/DC) 50 kΩ version: 75 kΩ

Max. permitted line capacitance 1 µF
Max. response error in accordance with ± 15%
DIN EN 61557-8 (05/98)
Reaction time 10 s

Environmental data

Climatic suitability IEC 60721-3-3, 1995
Condensation and icing Not permitted

Mechanical data

Max. cable cross section of ext. conductor 1 x 4 mm2 or 2 x 1.5 mm

DC1: 24 V/0.1 ... 5 A/120 W

range 1-50 V/1-100 mA

50 kΩ version: 12.5 ... 50 kΩ, adjustable
200 kΩ version: 50 ... 200 kΩ, adjustable
50 kΩ version:
200 kΩ version: Response value + ca. 20 kΩ
50 kΩ version:
200 kΩ version:

200 kΩ version: 460 V

200 kΩ version: 300 kΩ

Response value + ca. 5 kΩ

2.4 mA

1.0 mA

2

4

●

Dimensions (H x W x D) 87 x 22.5 x 122 mm
Weight 150 g

Description

Features:

● Relay outputs: 1 auxiliary contact
The earth fault monitoring relay is
enclosed in an S-95 slimline housing.
There are two versions available with

● Two insulation measuring circuits

● Detects symmetrical insulation

measuring ranges of 50 kΩ and
200 kΩ. The universal power supply
can be used with all supply voltages.

● Switch for function testing

● LED display for supply voltage

(See next page for function
description)

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

(C/O)

faults

and faults

NSG-D-2-127-2005-04

Electronic Monitoring Relays

Insulation monitoring

S1EN

The device measures the insulation
resistance between the phases and
system earth in galvanically isolated
voltage supplies. If the insulation
resistance in one of the two measur­ing circuits falls below the response
value Ron, the auxiliary contact
switches over and the fault LED

Internal wiring diagram

Measuring circuit,

G

N

B1 B2

Test:

Normal:

AR:

MR:

Evaluation

UNMains voltage
RonResponse value

lights up. If resistance then exceeds
the release value R
immediately ready for operation if

the device is

off

automatic reset is selected. If manual
reset is selected an external button
or the MR/AR switch must be
operated

ResetU

Y1 Y2

Non­latching/
latching

RE ≤ R

R

an

an

24 V DC

AC/DC:

24 ... 240 V

A1

U

K1

A2

B3

B

UB to B3-A2: 24 V AC/DC
UB to A1-A2: 42-240 V AC/DC

12

14

11

4

Timing diagram

U

B

R

E

R

off

R

on

11 - 14

Reset

11 - 14

UBSupply voltage
RonResponse value

Non-latching

1

0

Latching

R

Release value

off

REInsulation resistance

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

NSG-D-2-127-2005-04