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ZIEHL industrie-elektronik, 74523 Schwäbisch Hall, Germany, +49 791 504-0, info@ziehl.de, www.ziehl.de

12 inputs (for transformer STWA1)

2 of these inputs with adjustable switching

threshold AC 0,5...5 AA

12 outputs (Open Collector) max. DC 40 V/40 mA

relay OR-linked (of all 12 inputs)

LED displays (1/channel)

Multiplex operation possible

Applications:

The current relay STW12 is used where AC-current

yes/no has to be evaluated, however, the exact value

of the current is not relevant. Examples are the control

of machines in suction plants or monitoring of the

mode of operation of loads (on, off or damaged). The

STW12 is suitable in particular for being used in con-

nection with a PLC.

Current-Relay STW12

AC-Detection, 12-channel, Single evaluation, OR-Circuit

Technical Data

The current relay STW12 moni-

tors the current flow yes/no of up

to 12 alternating-current circuits.

If there is an AC-current of ≥1 A

through a connected transformer

STWA 1, the according output

transistorswitchesandtheyellow

LED lights up.

All the OR inputs are linked at the

sametime.Ifacurrentisidentified

in at least one of the monitored

currentcircuits,arelay(1change-

over contact) picks up.

The STW12 is installed at an

open printed circuit board. The

lower part can be used for snap-

fastening on a 35 mm DIN-rail or

for screw fastening (option). The

supply voltage is DC 24.

This voltage can be used at the

sametimeforinquiryoftheoutput

transistors. When requesting the

outputs in 2 groups in multiplex

operation, only 8 I/Os of the PLC

are needed.

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Power supply Us

Function

Transformer input

Overload cap.continous/max 10s

Switching points E1, E2

Tolerance

Switching points E3...E12

Switch-off delay

Switch-on delay

Output relay

Type of contact

Open Collector

Testing conditions

rated ambient temperature range

Dimensions H x B x T

Attachment

Protection housing / terminals

Weight

DC 20 - 30 V, < 2 VA

12-channel single/OR

1…12, type STWA 1

100 A / 300 A

adjustable, AC 0,5...5 A

± 20%

on ≤ AC 1 A

off ≥ AC 0,3 A

10 s.

approx. 0,5 s.

1 CO, 12 x Open-Collector

type 2 see "general technical informations"

max. DC 40 V/40 mA

see "general technical informations

"

-20°C…+55°C

design V 6: 90 x 105 x 32 [mm], 37-pole

on 35 mm DIN rail according to DIN EN 50 022 or with

screws M4 (option)

IP 30 / IP 20

approx. 135 g

Voltage Monitoring Type SW

GND

GND

GND GND E1 E2 E3 E4 E5

E6 E7 E8 E9 E10 E11 E12 18

15

16

GND +24V

A1 A2 A3

A4 A5 A6 A7 A8

A9 A10 A11 A12

GND

+24V I1

I2

24V

–

+

≥1

1 .... 12 Stromwandler/ current transformer STWA1(H)

STWA1H (+) = E1...E12

STWA1H (-) = GND

2015-09-04

STW12

Part number:

S225127

DC 20-30 V