DS-TRD-01

Sash distance sensor Type DS-TRD

DS-TRD

For EASYLAB fume cupboard controllers

Sash distance sensor for the variable, demand-based control of extract air flows in fume cupboards

Sash distance measurement
For fume cupboards with vertical sashes only; also for walk-in fume cupboards
Ideal for rooms with high airflow velocities or levels of turbulence
Multiple possibilities to couple the sensor with the sash movement
Measuring range 0 – 1750 mm or 350 – 2100 mm

Technical information

Function, Technical data, Specification text, Order code, Related products

DS-TRD sash distance sensor

① Sensor casing
② Connecting cable
③ Measuring wire
④ Screws / washers
⑤ Fixing bracket

Functional description

The sash distance is recorded with a draw wire that is linked to the sash movement. The output signal is proportional to the sash distance. The sensor can be used only with vertical sashes.

DS-TRD for fume cupboard control – linear control strategy

EASYLAB controller TCU3: Equipment function FH-DS

Variable volume flow control based on the measured sash distance
Volume flow rate is linear to the sash position: OPEN corresponds to V_max, CLOSED corresponds to V_min
Sash opening can be monitored according to EN 14175, without additional switch contact

DS-TRD for fume cupboard control – safety-optimised control strategy

EASYLAB controller TCU3: Equipment function FH-DV

Safety-optimised volume flow control based on the measured sash distance
The volume flow rate is linear to the sash distance; the aim is to maintain a constant safe face velocity (0.5 m/s) even if the sash is fairly wide open
Sash opening can be monitored according to EN 14175, without additional switch contact

Supply voltage	12 V DC from the controller
Measuring range	0 – 1750 mm or 350 – 2100 mm
Measurement accuracy	± 0.25 % of the reading
Actual value signal output	0 – 10 V DC, 0.5 mA max.
Operating temperature	–20 to 40 °C
IEC protection class	III (protective extra-low voltage)
Protection level	IP 40
EC conformity	EMC according to 2004/108/EC

Electronic sash distance sensor for the EASYLAB system, used to capture the sash distance of fume cupboards.

Suitable for sashes with 1750 mm maximum opening.

The sash distance is measured using a draw wire. A 0 – 10 V DC voltage signal that is proportional to the sash distance is emitted. If the sensor is connected to a fume cupboard controller, the volume flow is controlled based on demand.

Simple installation in several installation positions on the fume cupboard; simple linking to the sash movement.

Special characteristics

Suitable for sashes with 1750 mm maximum opening
Suitable for EASYLAB controller TCU3
Can be used with different control strategies (FH-DS and FH-DV)
Ideal for rooms with high airflow velocities or levels of turbulence
Replaces a separate contact for sash distance monitoring according to EN 14175

Materials and surfaces

Plastic casing, black
Measuring wire made of stainless steel, with a polyamide jacket
Mounting bracket made of galvanised sheet steel

Technical data

Supply voltage 12 V DC from the controller
Measuring range: 0 – 1750 mm or 350 – 2100 mm
Measurement accuracy: ± 0.25 % of the reading
Output: Actual value signal: 0 – 10 V
Protection level: IP 40

Any attachments are to be defined with the order code of the VAV terminal unit.
Retrofit possible

Dimensions

DS-TRD

Installation details

Measurement location of the sash distance sensor (FH-DS, FH-DV)

① Sash distance sensor DS-TRD
② Linked to the sash movement
③ Fume cupboard

Installation and commissioning

Fix the sash distance sensor to the fume cupboard
Link the measuring wire to the sash movement, e.g. by fixing it to the balance weight of the sash
The measuring wire can be drawn vertically or horizontally.
Measuring range 0 – 1750 mm or 350 – 2100 mm
The controller automatically recognises the sash distance sensor
Project-specific adjustments can be made, and the maximum operational sash opening can be entered using the EasyConnect configuration software

Downloads

product information

Product data sheet Type DS-TRD

Product data sheet 980 KB pdf

certificates

EC Declaration of conformity DS-TRD

CE_2019_08_DS-TRD-02_DE_de_en_fr EC Declaration of conformity 48 KB pdf

operation manuals

Installation and operating manual Type DS-TRD-02

Installation and operating manual 360 KB pdf

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