ZIEHL STW81V User manual

ZIEHL industrie – elektronik GmbH + Co KG
Daimlerstr.13, 74523 Schwäbisch Hall, Germany
+ 49 791 504-0, [e-mail], www.ziehl.de
Temperature Relays and MINIKA® Mains Monitoring Digital Panelmeters MINIPAN® Switching Relays and Controls Measuring Transducers Grid- and Plant Protection
Operating Manual
STW81V
updated: 2022-09-21/Um
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Operating manual, Quick guide, Datasheet, Connection diagram, CAD Data
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- Current relay, 8-channel, single evaluation + OR-circuit, adjustable switching point 0,5 - 5 A

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Table of contents
1General Notes......................................................................................................................................... 2
2Display and controls .............................................................................................................................. 3
3Default settings....................................................................................................................................... 3
4Application and brief description.......................................................................................................... 3
5Functional overview............................................................................................................................... 3
6Connection Diagram............................................................................................................................... 4
7Function.................................................................................................................................................. 4
8Important notes ...................................................................................................................................... 5
9Installation .............................................................................................................................................. 5
10 Connections............................................................................................................................................ 6
10.1 Connections....................................................................................................................................6
10.2 Tipps:..............................................................................................................................................6
11 Troubleshooting..................................................................................................................................... 6
12 Maintenance and servicing.................................................................................................................... 7
13 Technical data ........................................................................................................................................ 7
2Type V8 ................................................................................................................................................... 8
14 Entsorgung............................................................................................................................................. 8
1 General Notes
Compliance with the following instructions is mandatory to ensure the functionality and safety of the product.
If the following instructions given especially but not limited for general safety, transport, storage,
mounting, operating conditions, commissioning and disposal / recycling are not observed, the product may
not operate safely and may cause a hazard to the life and limb of users and third parties.
Deviations from the following requirements may therefore lead both to the loss of the statutory material
defect liability rights and to the liability of the buyer for the product that has become unsafe due to the
deviation from the specifications.

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2 Display and controls
1
Potentiometer t(s)
Switch
-
off delay for contacts 95, 96, 98 adjustable 0...60s
2
Potentiometer I1
-
I8(A)
Switching threshold for transformer inputs I1...I8 adjustable 0,5...5A
3
Power LED (green)
ON
STW81V active
OFF
STW81V inactive (no control voltage)
4
Relay status LED (yellow)
OFF
Relay off
ON
Relay on
MIGA
Activity ongoing
3 Default settings
The STW81V current relay is supplied with a switch-off delay of 0s and a set switching threshold of 0.5
4 Application and brief description
The STW81V current relay is an 8-fold AC current meter with individual evaluation of 8 current
circuits and OR connection of all inputs.
Usage:
The STW81V current relay is particularly suitable for the central control of gate valves in extraction
systems to be actuated according to the operating status of individual machines. It can
simultaneously control the central extraction system.
5 Functional overview
OR 8 inputs (I1...I8)
individual evaluation of 8 machines (STWA1(H), current sensor S1 or contact)
8 relays for sliders with open and closed contacts
1 relay for exhaust with open and closed contact
relay status LED indicators
adjustable response threshold 0.5...5A
switch-off delay for contacts 95, 96, 98 adjustable 0. 60 s
slide observation time 10 s
delay time for last slide = extraction release delay + 20 s
wide range power supply AC/DC 24...240 V
power consumption during normal operation with STWA1(H), < 0.6 W
8 TE distributing enclosure, installation depth 55 mm
mounting on standard 35 mm rail DIN EN 60715

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6 Connection Diagram
Stromsensor Current sensor
Kontakte Contacts
Stromwandler Current transducer
Schieber zu Closed slide
Schieber auf Open slide
Absaugungsmotor Extraction motor
7 Function
If a current between 0.5 and 5A flows through the connected current transducer type STWA1(H)
(adjustable by potentiometer I1-I8) or the current sensor S1 signals the current flow, or if the connected
contact is closed, the corresponding relay activates and the yellow LED goes on. If the current on
STWA1(H) falls below the set switching threshold, the corresponding relay is de-energized with a fixed
delay of 10 seconds. If it is the last relay energized, it switches off 20 s after K9.
At the same time, all 8 inputs are OR connected. If current is detected in at least one of the monitored
circuits, relay K9 closes contacts 95-98. The switching status of this relay is also indicated by a yellow
LED. The switch-off delay can be set in the range of 0 ... 60 s.
The corresponding yellow LED flashes during the delay. The STWA1(H) current transducer can be
loaded with a maximum current of AC 100 A.

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8 Important notes
9 Installation
The unit can be mounted as follows:
mounting of the distributor on a 35 mm mounting rail according to EN 60715.
using M4 screws for wall mounting. (additional screws are not included)
make the connection in accordance with the wiring diagram or the nameplate
Switch on the control voltage.
When the device is ready for operation, the relay must activate, when a current greater than the Ion response
value flows through one of the current transducers.
WARNING!
Dangerous electrical voltage!
May cause electric shock and burns.
Disconnect the system and equipment from the power source before starting any work.
Caution!
Only one live wire may be fed through the current transducer!
Failure-free and safe operation of the equipment requires that it is properly transported and stored,
professionally installed and commissioned, and operated as intended.
Work on the unit may only be performed by persons who are familiar with the installation, startup and
operation of the unit and who have the necessary qualifications for this works. They must comply with the
operating manual, the instructions placed on the device and the relevant safety regulations for the
installation and operation of electrical systems.
The devices are built and tested according to DIN VDE/EN/IEC standards and leave the factory in perfect
safety condition.
To maintain this condition, follow the safety instructions in the manual marked "Caution". Failure to follow the
safety instructions could result in death, personal injury, or property damage to the device itself and to other
units and equipment.
If the information in the manual is not sufficient, please contact us directly or your sales agent.
Instead of the industrial standards and regulations mentioned in the operating manuals and applicable in
Europe, observe any relevant regulations valid in the country of use, should the device is operated outside
the above area.
Install a circuit breaker marked as a isolating device and an overcurrent protection
device (rated current ≤ 10 A) in the power line near the unit (easily accessible).
Observe the maximum permissible temperature when installing in the control box. Ensure adequate
distance from other appliances or heat sources. If cooling is impeded, e.g. by close proximity to equipment
with a higher surface temperature or hindered cooling air flow, the permissible ambient temperature will be
reduced.
Caution
Before connecting the unit to the mains supply, make sure that the Us control voltage on
the side rating plate corresponds to the mains voltage connected to the unit!

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10 Connections
10.1 Connections
Connection Function
A1 and A2 Control voltage Us, see technical data
15 Common switching contact for slider outputs
(GND) Current transducer common earth connection STWA1(H)
I1 … I8 Inputs for STWA1(H), potential free contacts or current sensor S1
+U Common supply voltage for potential free contacts or S1 current
sensor
16, 26, … 86 8 outputs for closed gate
18, 28, … 88 8 outputs for open slider
95, 96, 98 Exhaust performance (95-98 = exhaust on)
10.2 Tipps:
Response threshold is too high (current flow in the wire is too low):
reduce the response threshold by potentiometer
if the smallest setting option is insufficient, loop the lines through the current transducer
STWA1(H) several times.
Response threshold is too low (base load current must be extinguished):
increase the response threshold by potentiometer
connect a resistor (0.25 W / 200 V) before the corresponding input of STW81V in parallel to the
current transducer STWA1(H).
 750 Ω resistor = increase by a factor 2
 330 Ω resistor = increase by a factor 4
Due to large tolerances that must be considered, we recommend that the best values be
determined by trial and error method.
Length of connecting cables STWA1(H):
Up to 50 m, but much longer are also possible.
Shielding may be required when laid parallel to power lines.
11 Troubleshooting
Problem Cause Remedy
Relay does not switch
Supply voltage is not
connected to terminals
A1, A2
Check that the power supply voltage is
connected and that it corresponds to the
voltage of the unit indicated on the side
nameplate.
No current through current
transducer
Check that the current transducer is
properly connected and that the receiver is
turned on
More than 1 conductive wire
routed through the
transducer
Run only one current-carrying wire through
the transducer.
Relay does not turn on Check the switching threshold on
potentiometer I1
-
I8.
Relay does not switch at
potential-free contacts Incorrectly connected contacts Potential-free contacts must be connected to +U

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12 Maintenance and servicing
STW81V is maintenance free. If necessary, check regularly to make sure the unit is working.
13 Technical data
Control voltage Us: DC/AC 24 – 240 V 0/50/60 Hz
Tolerance DC 20,4 - 297 V AC 20 - 264 V
Power consumption < 2 W < 6 VA
Relay outputs K1...K9 9 x 1 switching contact
Switching voltage max 300 V AC; 300 V DC
Normally open (NO) inrush current AC 15 A 4s 10% ED
Minimum values Voltage/current 12 V 10 mA
Conventional thermal current Ith max 5A
Total current through terminal 15 max 5A
Switching capacity max AC cos φ = 1 1500 VA
Switching capacity max DC (ohmic) 0.3 A 300 V; 0.4 A 120 V; 0.8 A 60 V; 5 A 30 V
Electrical contact life cos φ = 1 cos φ = 1 -> 5 x 105 switching cycles at 250 V / 2 A
Durability of mechanical contact 3 x 107 switching cycles
Short circuit resistance (NO)
Short circuit resistance (NC) 4 A slow action or LS switch B4 3.15 A slow action
Capacity Utilization category AC-15. Ie = 3 A Ue = 250 V
Nominal operating current Nominal
operating voltage
DC-13
DC-13
DC-13.
Ie = 2 A Ie
= 0,4 A
Ie = 0.2 A
Ue = 24 V Ue =
120 V
Ue = 240 V
Transducer connection
Connectable transducers 1 STWA1(H) transducer or potential free contact, or 1 S1
current sensor per channel.
AC internal resistance ca. 15kΩ
Overload capacity STWA1(H) max 100A continuous, max 300A for 10s
Voltage output +U
Parameters 17 … 21V;
max 120mA at 230V Us (max 8x current sensor S1) max 10mA
at 24V Us (max 0x current sensor S1)
Testing conditions EN 61010-1
Rated withstand surge voltage 4000V
Overvoltage category III
Degree of contamination 2
Rated insulation voltage Ui 300V
Work cycle 100%
EMC tests EN 61326-1 industrial environment
Interference emission EN 61326-1; CISPR 11 Class B
Interference immunity EN 61326-1 industrial environment
Rapid transient disturbances/impacts EN 61000-4-4 ±4.5 kV
pulses 5/50 ns, f = 5 kHz, t = 15 ms, T = 300 ms
High energy surge voltage (SURGE) IEC 61000-4-5 ±2 kV
Environmental conditions
Permissible ambient temperature -20 °C ... +65°C
Permissible storage temperature -20 °C …+70 °C

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Installation altitude < 2000 m a.s.l.
Resistance to climatic conditions 585% relative humidity, non-condensing
Permissible wiring temperature -5 °C …+70 °C
Vibration resistance EN 60068-2-6 2 … 13.2 Hz ±1 mm 13.2 ... 100 Hz 1 g
2…25 Hz ±1.6 mm 25 ... 150 Hz 5 g
Casing Type V8, transducer mounting
Installation depth 58 mm
Width 8 TE
Dimensions (W x H x D) 140 x 90 x 58 mm
Cable connection one wire 1 x 0.34 - 2.5 mm² / AWG 22 - 12
Fine wire with wire end 1 x 0.34 - 2.5 mm² / AWG 22 - 12
Tightening length / torque 8 mm / 0.5 Nm
Degree of protection Casing / terminals IP 30 / IP20
Fastening Snap-on mounting on 35 mm mounting rail according to
EN 60 715 or screw fixing M 4
(additional clamp is not included)
Weight approx. 300 kg.
Subject to technical changes
2 Type V8
Dimensions in mm
1. Upper part / cover
2. Bottom part / base
3. Snap / bar for snap mounting
4. Sealing latch
5. Front panel insert / front panel
6. Position downward
7. Snap on wall mount with screws. Screw hole Ø 4,2 mm / for fixing
to the wall with screws, Ø 4,2 mm.
14 Entsorgung
Die Entsorgung muss sachgerecht und umweltschonend nach den gesetzlichen Bestimmungen
erfolgen.
ZIEHL ist bei der Stiftung EAR (Elektro Altgeräte Register) unter der
WEEE-Nr.: DE 49 698 543 registriert.