Belimo NKQB24-1 Quick Start Manual

NKQB24-1, NKQX24-1
On/Off, Fail-Safe, Operation, Direct Coupled, 24V
Technical Data NKQB24-1, NKQX24-1
Power supply 24VAC ±20% 50/60Hz
24VDC ±10%
Power consumption 11W (3W)
Transformer sizing 22VA (class 2 power source)
Electrical connection 18 GA plenum rated cable
½" conduit connector
protected NEMA 2 (IP54)
3 ft [1m] 10 ft [3m] 16 ft [5m]
Overload protection electronic throughout 0 to 95 rotation
Operation range Y on/off
Input impedance 100kΩ (0.1 mA), 500Ω
1500Ω (PWM, on/off)
Feedback output U 2 to 10VDC, 0.5mA max, VDC variable
Angle of rotation max. 95°, adjustable with mechanical stop
electronically variable
Torque 54 in-lb [6 Nm]
Direction of rotation
reversible with
Fail-safe position adjustable with dial or tool 0 to 100% in 10%
increments
Position indication refl ective visual indicator (snap-on)
Manual override external push button
Running time
normal operation 4 seconds (default), variable 4 to 16 seconds
fail-safe 4 seconds
Humidity 5 to 95% RH non-condensing (EN 60730-1)
Ambient temperature -22°F to +122°F [-30°C to +50°C]
Storage temperature -40°F to +176°F [-40°C to +80°C]
Housing NEMA2, IP54, UL enclosure type 2
Housing material UL94-5VA
Agency list cULus acc. to UL 60730-1A/-2-14
CAN/CSA E60730-1:02
CE acc. to 2004/108/EEC and 2006/95/EC
Noise level < 60dB(A)
Servicing maintenance free
Quality standard ISO 9001
Weight 2.4 lbs [1.10 kg]
800-543-9038 USA
161
switch
866-805-7089 CANADA
Torque min. 54 in-lb for control damper surfaces up to 12 sq ft.
Application
For proportional modulation of dampers in HVAC systems.
The NKQB24-1 and NKQX24-1 provide electrical power off operation for reliable
fail-safe application.
The actuator is mounted directly to a damper shaft up to 1.05" in diameter. A
crank arm and several mounting brackets are available for applications where
actuator cannot be direct coupled to the damper shaft.
Operation
The actuator is electronically protected against overload. The anti-rotation
strap supplied with the actuator will prevent lateral movement.
The NKQB24-1 and the NKQX24-1 provide 95° of rotation and a visual indicator
shows the position of the actuator. When reaching the damper or actuator
end position the actuator automatically stops. The gear can be manually
disengaged by pressing the button located on the actuator cover.
The NKQB24-1 and NKQX24-1 actuators use a brushless DC motor controlled
by an Application Specifi c Integrated Circuit (ASIC). The ASIC monitors
and controls the actuators rotation and provides a digital rotation sensing
(DRS) function to prevent damage to the actuator in a stall condition. Power
consumption is reduced in a holding mode.
Add-on auxiliary switches or feedback potentiometers are easily fastened
directly onto the actuator body for signaling and switching functions.
Dimensions (inches [mm])
5.47" [139]
1.18"
[30] 6.30" [160]
1.61"
[41]
203-791-8396 LATIN AMERICA