MAMAC SYSTEMS HU-224 Technical Information

FOR ADDITIONAL INFORMATION
SEE HU-224/225 DATA SHEET
SPECIFICATIONS
Accuracy*: ± 2% / ± 3% RH
Range: 0-100% RH
Hysteresis: ± 1%
Supply Voltage:12-40 VDC
12-35 VAC (VDC output units only)
Supply Current: VDC Units - 10 mA max.
mA Units - 20 mA max.
Enclosure: 18 Ga C. R. Steel NEMA 4 (IP-65) or ABS Plastic
Finish: Baked on enamel-PMS2GR88B
or off white
Conformance: EMC Standards EN50082-1(1992)
EN55014(1993)/EN60730-1(1992)
Compensated Temp Range: -30ºF-130ºF
Environmental:10-90%RH Non-Condensing
Termination: Unpluggable screw terminal block
Wire Size: 12 Ga max.
Load Impedance: 3K ohms max. at 40 VDC (mA output units)
1K ohms min. (VDC output units)
Weight: Duct mount: 1.0 lbs. (.45 kg)
Wall mount: 0.5 lbs. (.25 kg)
*Includes non-linearity and non-repeatability
ORDERING
PACKAGING ACCURACY
HU-224 (duct mount) ±2%
HU-225 (wall mount) ±3%
INSTALLATION
Inspection Inspect the package for damage. If damaged, notify the
appropriate carrier immediately. If undamaged, open
the package and inspect the device for obvious damage.
Return damaged products.
Requirements • Tools (not provided)
- Digital Volt-ohm Meter (DVM)
- Appropriate screwdriver for mounting screws
- Appropriate drill and drill bit for mounting screws
• Appropriate accessories
• Two #8 self-tapping mounting screws (not provided)
• Training: Installer must be a qualified, experienced
technician
(-35ºC-55ºC)
OUTPUT
mA (4-20 mA 2 wire)
VDC (0-5 VDC or 0-10 VDC field
selectable)
Warning:
• Disconnect power supply before installation to prevent
electrical shock and equipment damage.
• Make all connections in accordance with the job wiring
diagram, and in accordance with national and local
electrical codes. Use copper conductors only.
Caution:
!
• Use electrostatic discharge precautions (e.g., use of
wrist straps) during installation and wiring to prevent
equipment damage.
• Avoid locations where severe shock or vibration,
excessive moisture or corrosive fumes are present.
NEMA Type 4 housings are intended for outdoor use
primarily to provide a degree of protection against
wind-blown dust, rain, and hose-directed water.
• Do not exceed ratings of the device.
Mounting
HU-224 (DUCT) The HU-224 must be mounted as
referenced by figure 5.
1. Drill 5/8" hole in appropriate location.
2. Mount transducer on a vertical surface with two #8
self-tapping screws (not provided).
3. Pull wires through knockout and make necessary
connections (see wiring drawings).
4. Replace cover tighten phillips screws.
HU-225 (WALL) The HU-225 must be mounted as
referenced by figure 5.
1. Turn both allen screws CW on bottom of unit - remove
cover.
2. Select the mounting location, locate away from
diffusers, lights, or any external influences.
3. Mount transducer on a vertical surface with two screws
provided.
4. Pull wires through sub base hole and make necessary
connections (see wiring drawings).
4. Replace plastic cover and turn allen screws CCW.
Wiring
Use maximum 12 AWG wire for wiring terminals. Refer
to figures 1, 2, 3, & 4 for wiring information.
Wiring HU-224/225 Units with mA Output
HU-224/225 humidity transducers are 4-20 mA output
units powered with a 12-40 VDC supply.
The following describes the proper wiring of these
pressure transducers with mA output:
1. Remove the blue terminal block by carefully pulling
it off the circuit board.
2. Locate the [+] and [-] terminal markings on the board.
3. Attach the supply voltage to the [+] lead.
4. Connect the 4-20 mA output ([-] terminal) to the
controller's input terminal.
5. Ensure that the power supply common is attached to
the common bus of the controller.
6. Re-insert the terminal block to the circuit board and
apply power to the unit.
7. Check for the appropriate output signal using a DVM
set on DC milliamps connected in series with the [-]
terminal.
Model HU-224/225
Technical Information
TI.224/225-01
Humidity Transduce r