PLANT ENGINEERING
AIRFLOW MONITORS, WSERD-XXX.446 ELECTRONIC AIRFLOW MONITORS
TECHNICAL DATA
APPLICATION
Rated voltage:
100 – 240 VAC or 24 V ±10% AC / DC
The WSERD airflow monitors are used for the analysis of airflows and the switching statuses that are generated as a result, for monitoring fans or butterfly valves, for flow-dependent monitoring of humidifiers and electric heat registers in accordance with DIN 57100, part 420 and are used in conjunction with DDC systems. The measuring system, consists of the sensor and the control unit. Two differ- ent models of the measuring system are offered: one for wall mounting (the sensor is connected using a cable) and the WSERD-534.446 for duct mounting (the sensor is permanently connected to the control unit). Sensors and control units are balanced independently of one another, and the wall-mounted model can be replaced with devices that are similar in design.
Rated power consumption:
< 3 VA
Contact:
2 x togglers, potential-free
Switching voltage: Switching current: Electrical connection:
max. 250 VAC
max. 8 A
2.5 mm² (sensor 1.0 mm²), screw-type terminals
Protection class: Protection rating:
2
IP65 (housing) / IP54 (sensor), EN 60529
Setting range:
0.2 – 10 m / s
Operational range:
0.8 – 10 m / s flow speed
Start delay:
15 – 120 seconds
Ambient temperature range:
housing (0 to +50 °C) / sensor ( –20 to +90 °C)
Transport and storage tempera- ture:
–10 to +75 °C
Permissible atmospheric humidity:
< 95%
Condensation:
permissible (only external)
Overvoltage category (control unit):
2
Rated impulse voltage:
4000 V
Degree of fouling:
2
Material:
housing cover (polycarbonate), bottom part of housing (ABS), sensor (PVC), cable gland (PA6), sensor housing (aluminium with polyamide PA6)
This device meets the following requirements: 2014 / 30 / EU EMC directives • 2014 / 35 / EU Low Voltage Directive • EN 61326-1:2013 General EMC Requirements • EN 61326-2-3:2013 Immunity for residen - tial / commercial areas • DIN EN 60947-5-1 Low-voltage switchgear and control gear • EN 50581:2012 Restriction of the use of certain hazardous substances
Mounting: performed according to model using suitable screws (WSERD-134.446; not included in the scope of delivery) on even substrate or on the duct using the mounting flange included in the scope of delivery (WSERD-534.446).
TYPE
ITEM NO.
FEATURES
EURO / PG
WSERD-134.446
G8000428
For wall mounting
388.40 / III
WSERD-534.446
G8000429
For duct mounting
388.40 / III
ILLUSTRATIONS
WSERD-134.446 for wall mounting
WSERD-534.446 for duct mounting
220
Catalogue 2023
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