8
G
RHEASGARD
®
KHSSF ⁄ RHEASREG
®
KHSSW
Rev. Data - V10
Electronic duct top-hat rail airflow sensor
RHEASGARD
®
KHSSF
with active ⁄ switching output, housing for installation in distributor
boxes or control cabinets with 35 mm mounting rail, external flow probe incl. mounting flange, for determining the flow velocity
(0.1…20 m/s). The measuring transducer automatically detects the required output type and converts the measurands into the required
standard signal of 0–10 V or 4…20 mA (
Automatic Output Switching
).
Electronic duct top-hat rail airflow monitor
RHEASREG
®
KHSSW
with switching output, housing for installation in distributor boxes or
control cabinets with 35 mm mounting rail, external flow probe incl. mounting flange, for determining the flow velocity (0.1…20 m/s).
The flow sensors ⁄ flow monitors are suitable for monitoring or controlling airflows in ducts, at fans and dampers,
for flow-dependent monitoring of humidifiers and electric heating registers according to DIN 57100, Sect. 420,
or for use in connection with DDC systems.
TECHNICAL DATA
Power supply:
24 V AC ⁄ DC (± 10 %)
(
KHSSW-W24, KHSSF-W
)
230 V AC (± 10 %), 50 Hz (
KHSSW-W230
)
Current consumption:
approx. 3 VA
Outputs:
KHSSF-W
0–10 V ⁄ 4…20 mA
(via
Automatic Output Switching
–
the unit recognises the required output type
and automatically switches to U or I output);
24 V changeover contact (max. 5 A, cos ϕ = 1), a switching hysteresis
of 2 % final value, threshold can be adjusted via potentiometer
KHSSW-W24
24 V changeover contact (max. 5 A, cos ϕ = 1), a switching hysteresis
of 2 % final value, threshold can be adjusted via potentiometer
KHSSW-W230 230 V AC
changeover contact (max. 10 A, cos ϕ = 1), a switching hysteresis
of 2 % final value, threshold can be adjusted via potentiometer
Data point:
flow velocity [m/s]
Sensor:
calorimetric, temperature compensated, sensor breakage protection
Measuring range:
0.1…20 m/s
Accuracy:
0.5 m/s + 3 % measured value
Long-term stability:
± 0.5 % of final value per year
Reproducibility:
± 1.0 % of final value
Switching hysteresis:
2.0 % of final value
Warm-up time:
< 2 min
Response time:
< 60 s
Start-up override:
60 s (changeover contact switched or 10 V / 20 mA at output,
after applying the supply voltage)
LED operating
Yellow LED
off:
switching point not reached (contact 5-6 open)
status indicator:
on:
switching point reached (contact 5-6 closed)
flashing:
start-up override is active
Green LED
on:
Unit is ready for operation
flashing:
error in sensor or sensor line
Housing:
PC / ABS (UL94-V0) material, light grey colour,
36 mm (2TE) wide for 35 mm mounting rail,
approx. 90 x 36 x 58 mm (H x W x D)
Probe/sensor:
Polyamide (PA6) material, white colour (blue sensor holder), with torsion protection,
Ø 12 mm, EL = approx. 20–155 mm, v
max
= 30 m/s (air)
Sensor cable:
PVC LiY Y, 3-wire, KL = approx. 2.4 m
Electrical connection:
0.14–2.5 mm
2
, via screw terminal
Process connection:
by means of mounting flange with seal
(included in the scope of delivery)
Ambient temperature:
storage –20…+50 °C; operation 0…+60 °C
Medium temperature:
0…+70 °C
Permitted humidity:
< 98 % RH, non-precipitating air free of harmful substances
Protection class:
II (according to EN 60 730) with UB = 230 V
(
KHSSW-W230
)
III (according to EN 60 730) with UB = 24 V
(
KHSSW-W24, KHSSF-W
)
Protection type:
IP 30
(according to EN 60 529) housing
IP 20
(according to EN 60 529) sensor technology
Standards:
CE conformity according to EMC Directive 2014 ⁄ 30 ⁄ EU, according to EN 61326-1, as per EN 61326-2-3
