MS Electronics IP65H User manual

Product Guide
IP65H
IP65H/24V
today, tomorrow and in the future
mselectronics.co.uk
IP65 Rated Humidistat
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2
Issue 1.0
Product Overview
The IP65H utilises an IP65 rated polycarbonate enclosure with an embedded high accuracy
temperature sensor to control heating or air conditioning. A built-in M20 cable gland maintains the
IP65 rating when used with appropriate electrical cable.
The IP65H regulates to a fully adjustable relative humidity set-point between 5% and 95%,
combined with an adjustable relative humidity hysteresis (di󰀨erential) of anything between 1% and
10%.
Product Wiring
1. IMPORTANT: ensure all electrical connections are isolated before commencing any work on the
unit.
2. Power to the humidistat is provided via the Live and Neutral input terminals labelled “L” and “N”
(230V AC, 50Hz).
3. A voltage-free changeover relay output capable of switching loads of up to 10A, 250V AC (resistive)
is provided by the humidistat. Connect to your application in an appropriate manner given the
following:
• The Common “COM” terminal is connected to the Normally Open “NO” terminal when the
sensed relative humidity is above the “Setpoint” humidity. (Use to control dehumidication
equipment, including air conditioners.)
• Conversely, the “COM” terminal is connected to the Normally Closed “NC” terminal
when the relative humidity is sensed to be below the “Setpoint” humidity. (Use to control
humidication equipment.)
Figure 1 Typical wiring example

3Issue 1.0
Installation
1. IMPORTANT: ensure all electrical connections are isolated before commencing any work on the
unit.
2. Unscrew and remove the front of the enclosure which contains the electronics.
3. Mount the rear of the enclosure to the wall using the 4 pre-existing screw points. DO NOT drill
through the back of the enclosure as this will void the product IP rating.
4. Ensure best-practices are used when choosing a location for the thermostat so that optimal
thermostatic control is achieved. Do not mount near drafts, heaters, radiators, air conditioners, in
direct sunlight or any other place where the sensed temperature may be unnaturally inuenced. A
good mounting height is typically between 1m and 2m from the oor.
5. Pass the electrical cable through the cable gland then connect as shown in Figure 1 (or any suitably
appropriate form). Ensure the correct output terminals that are suitable to your application are
chosen.
6. Adjust the internal thumbwheels to suit the desired operational requirements (see below).
7. Before replacing the cover, securely connect its ying lead to the Front Panel connector.
8. Reattach the cover securely, alternating between screws in opposite corners to create an even seal.
9. IMPORTANT: ensure that the sensor is not installed in a poisition where it is likely to get water
sitting on it at any time. If water is allowed to sit on the sensor this will give false humidity readings.
Operation
1. IMPORTANT: ensure all electrical connections are isolated before commencing any work on the
unit.
2. Adjust the “Setpoint” dial to the relative humidity the duct air is to be regulated to.
3. Set the “Di󰀨erential” to the total relative humidity swing either side of the “Setpoint” that the duct air
humidity is required to keep within.
4. Example of a typical set-up:
Setpoint set to 55% RH, Di󰀨erential set to 4% RH.
The unit will maintain the relative humidity between 53% RH and 57% RH.
Technical Specication
Power supply: 220V - 240V AC 50Hz (live/neutral)
22V - 24V AC or DC (“/24V” variant only)
Output switch rating: 10A, 250V AC 50Hz (resistive)
Output switch type: Changeover relay (volt-free)
Humidity control: 5% RH to 95% RH
Humidity di󰀨erential: 1% RH to 10% RH
Sensor accuracy: +/- 3% RH
Sensor drift: +/- 1.2% RH over 5 years (no calibration required)
Guarantee: 5 Years
Weight: 190g
Dimensions: 82mm x 80mm x 55mm

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MS Electronics reserves the right to alter or change this specification without prior notice.
IMPORTANT INSTALLATION NOTICE
The installation of this product should be carried out in accordance with the latest IEE wiring
regulations and all wiring completed by a qualified electrician.
Technical Support
For further help or information on this and the other products in the MS Electronics range
visit www.mselectronics.co.uk or call 0333 666 1176.
Alternatively, email [e-mail]
Additional copies of this product guide can be downloaded from our website.
Product Warranty
MS Electronics guarantees all their products against manufacturing defects for
5 years from the purchase date. If your product is found to be faulty, MS Electronics will,
at their discretion, repair or replace the product free of charge.
Note
Any modification or damage to the outer casing of the product, as well as any
damage to the product due to abuse or incorrect wiring may invalidate the guarantee.
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