Wieland SNE 4028S Catalog Page

SNE 4028S

CONTACT EXPANSION

] Y t

APPLICATIONS

• Duplication of the enabling current paths of a basic device

• Contact expansion in safety-oriented systems

• Amplification of the output performance of light curtains

• Up to PL e / Category 4 (EN ISO 13849-1)*

• Up to SIL

3 (EN 62061)*

CL

FEATURES

• Single-channel or two-channel control

• Cross monitoring

• Safe isolation

• 8 enabling current paths, 1 signal current path

* Depends on the category of the basic device or the safet y control.

FUNCTION

After the supply voltage is applied to terminals A1/ A2 and the
safety inputs are closed, the enabling current paths (NO contacts)
are closed and the signaling current paths (NC contacts) are
opened automatically. When the safety inputs are opened/
de-energized the enabling current paths (NO contacts) are opened
immediately and the signaling current paths (NC contacts) are
closed.

CIRCUIT DIAGRAM

SNE 4028S

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OVERVIEW OF DEVICES | PART NUMBERS

Typ e Rated voltage Ter minal s Part no. P.U .

SNE 4028S-A 24 V DC R1.188.3120.0 1
SNE 4028S-A 115-230 V AC R1.188.3510.0 1
SNE 4028S-C 24 V DC R1.188.3540.0 1
SNE 4028S-C 115-230 V AC R1.188.3550.0 1

Screw terminals, pluggable
Screw terminals, pluggable
Push-in terminals, pluggable
Push-in terminals, pluggable

TECHNICAL DATA

Function Contact expansion relay
Function display 3 LEDs, green

Power supply circuit

Rated voltage U

N

A1, A2 24 V AC/DC / 115-230 V AC

Rated consumption 24 V AC/DC 3.4 W / 6.1 VA

115-230 V AC 2.7 W / 6 VA
Rated frequency 50 - 60 Hz
Operating voltage range U

B

0.85 - 1.1 x U

N

Electrical isolation supply circuit - control circuit yes (at UN = 115-230 V AC)

Control circuit

Rated output voltage S11/S21 24 V DC
Input current / peak current S12, S32/S22 50 mA / 200 mA
Response time t
Recover y time t
Release time t
Permissable test pulse time t
Max. resistivity, per channel

/ t

A1

A2

w

R

TP

1)

24 V AC/DC ≤ (5 + (1.176 x UB / UN - 1) x 100) Ω

25 ms
≤ 40 ms
10 ms
< 1 ms

115-230 V AC ≤ 12 Ω

Output circuit

Enabling paths 13/14, 23/24, 33/34, 43/44 normally open contact

53/54, 63/64, 73/74, 83/84 normally open contact
Signaling paths 91/92, Y1/Y2 normally closed contact

Y03/Y04 semiconductor output (PNP), not safet y-oriented
Contact assignment forcebly guided
Contact type Ag-alloy, gold-plated
Rated switching voltage enabling- / signaling path 230 V AC / 24 V DC

Y03/Y04 24 V DC
Max. thermal current I

th

enabling- / signaling path 6 A / 2 A

Y03/Y04 20 mA
Max. total current I2 of all current path (Tu = 55 ºC) 2 x 25 A²
Application category (NO) AC-15 U

DC-13 U

230 V, Ie 5 A

e

24 V, Ie 5 A

e

Short-circuit protection (NO), lead fuse / circuit breaker 6 A class gG / melting integral < 90 A²s
Mechanical life 10

7

switching cycles

General data

Creepage distances and clearances between the circuits EN 60 664 -1
Protection degree according to EN 60529 (housing / terminals) IP40 / IP20
Ambient temperature / storage temperature -25 ºC - +55 ºC / -25 ºC - + 75 ºC
Wire ranges screw terminals, fine-stranded / solid 1 x 0.2 mm² – 2.5 mm² / 2 x 0.2 mm² – 1.0 mm²

fine-stranded with ferrules 1 x 0.25 mm² – 2.5 mm² / 2 x 0.25 mm² – 1.0 mm²
Permissible torque 0.5 - 0,6 Nm
Wire ranges push-in terminals 1 x 0.25 mm² – 1.5 mm²
Weight 0.38 kg
Standards EN ISO 13849-1, EN 62061, EN 61511
Approvals TÜV, cULus, CCC

1)

If two-channel devices are installed as single channel, the value is halved.

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safe REL AY

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