Campbell CS120A User manual

CS120A
Power Supply
Enclosure
Issued: 29.10.14
Copyright © 2012 Campbell Scientific Ltd.
CSL 949
INSTALLATION GUIDE

Guarantee
This equipment is guaranteed against defects in materials and workmanship.
This guarantee applies for twelve months from date of delivery. We will repair
or replace products which prove to be defective during the guarantee period
provided they are returned to us prepaid. The guarantee will not apply to:

Equipment which has been modified or altered in any way without the
written permission of Campbell Scientific

Batteries

Any product which has been subjected to misuse, neglect, acts of God or
damage in transit.
Campbell Scientific will return guaranteed equipment by surface carrier
prepaid. Campbell Scientific will not reimburse the claimant for costs incurred
in removing and/or reinstalling equipment. This guarantee and the Company’s
obligation thereunder is in lieu of all other guarantees, expressed or implied,
including those of suitability and fitness for a particular purpose. Campbell
Scientific is not liable for consequential damage.
Please inform us before returning equipment and obtain a Repair Reference
Number whether the repair is under guarantee or not. Please state the faults as
clearly as possible, and if the product is out of the guarantee period it should
be accompanied by a purchase order. Quotations for repairs can be given on
request. It is the policy of Campbell Scientific to protect the health of its
employees and provide a safe working environment, in support of this policy a
“Declaration of Hazardous Material and Decontamination” form will be
issued for completion.
When returning equipment, the Repair Reference Number must be clearly
marked on the outside of the package. Complete the “Declaration of
Hazardous Material and Decontamination” form and ensure a completed copy
is returned with your goods. Please note your Repair may not be processed if
you do not include a copy of this form and Campbell Scientific Ltd reserves
the right to return goods at the customers’ expense.
Note that goods sent air freight are subject to Customs clearance fees which
Campbell Scientific will charge to customers. In many cases, these charges are
greater than the cost of the repair.
Campbell Scientific Ltd,
80 Hathern Road,
Shepshed, Loughborough, LE12 9GX, UK
Tel: [phone]
Fax: [phone]
Email: [email protected]
www.campbellsci.co.uk

PLEASE READ FIRST
About this manual
Some useful conversion factors:
Area: 1 in2(square inch) = 645 mm2
Length: 1 in. (inch) = 25.4 mm
1 ft (foot) = 304.8 mm
1 yard = 0.914 m
1 mile = 1.609 km
Mass: 1 oz. (ounce) = 28.35 g
1 lb (pound weight) = 0.454 kg
Pressure: 1 psi (lb/in2) = 68.95 mb
Volume: 1 UK pint = 568.3 ml
1 UK gallon = 4.546 litres
1 US gallon = 3.785 litres
Recycling information
At the end of this product’s life it should not be put in commercial or domestic refuse
but sent for recycling. Any batteries contained within the product or used during the
products life should be removed from the product and also be sent to an appropriate
recycling facility.
Campbell Scientific Ltd can advise on the recycling of the equipment and in some cases
arrange collection and the correct disposal of it, although charges may apply for some
items or territories.
For further advice or support, please contact Campbell Scientific Ltd, or your local agent.
Campbell Scientific Ltd, Campbell Park, 80 Hathern Road, Shepshed, Loughborough, LE12 9GX, UK
Tel: [phone] Fax: [phone]
Email: [email protected]
www.campbellsci.co.uk

Precautions
DANGER —MANY HAZARDS ARE ASSOCIATED WITH INSTALLING, USING, MAINTAINING, AND WORKING ON
OR AROUND TRIPODS, TOWERS, AND ANY ATTACHMENTS TO TRIPODS AND TOWERS SUCH AS SENSORS,
CROSSARMS, ENCLOSURES, ANTENNAS, ETC. FAILURE TO PROPERLY AND COMPLETELY ASSEMBLE,
INSTALL, OPERATE, USE, AND MAINTAIN TRIPODS, TOWERS, AND ATTACHMENTS, AND FAILURE TO HEED
WARNINGS, INCREASES THE RISK OF DEATH, ACCIDENT, SERIOUS INJURY, PROPERTY DAMAGE, AND
PRODUCT FAILURE. TAKE ALL REASONABLE PRECAUTIONS TO AVOID THESE HAZARDS. CHECK WITH YOUR
ORGANIZATION'S SAFETY COORDINATOR (OR POLICY) FOR PROCEDURES AND REQUIRED PROTECTIVE
EQUIPMENT PRIOR TO PERFORMING ANY WORK.
Use tripods, towers, and attachments to tripods and towers only for purposes for which they are designed. Do not
exceed design limits. Be familiar and comply with all instructions provided in product manuals. Manuals are
available at www.campbellsci.eu or by telephoning [phone] (UK). You are responsible for conformance
with governing codes and regulations, including safety regulations, and the integrity and location of structures or land
to which towers, tripods, and any attachments are attached. Installation sites should be evaluated and approved by a
qualified engineer. If questions or concerns arise regarding installation, use, or maintenance of tripods, towers,
attachments, or electrical connections, consult with a licensed and qualified engineer or electrician.
General
•Prior to performing site or installation work, obtain required approvals and permits. Comply with all
governing structure-height regulations, such as those of the FAA in the USA.
•Use only qualified personnel for installation, use, and maintenance of tripods and towers, and any
attachments to tripods and towers. The use of licensed and qualified contractors is highly recommended.
•Read all applicable instructions carefully and understand procedures thoroughly before beginning work.
•Wear a hardhat and eye protection, and take other appropriate safety precautions while working on or
around tripods and towers.
•Do not climb tripods or towers at any time, and prohibit climbing by other persons. Take reasonable
precautions to secure tripod and tower sites from trespassers.
•Use only manufacturer recommended parts, materials, and tools.
Utility and Electrical
•You can be killed or sustain serious bodily injury if the tripod, tower, or attachments you are installing,
constructing, using, or maintaining, or a tool, stake, or anchor, come in contact with overhead or
underground utility lines.
•Maintain a distance of at least one-and-one-half times structure height, or 20 feet, or the distance
required by applicable law, whichever is greater, between overhead utility lines and the structure (tripod,
tower, attachments, or tools).
•Prior to performing site or installation work, inform all utility companies and have all underground utilities
marked.
•Comply with all electrical codes. Electrical equipment and related grounding devices should be installed
by a licensed and qualified electrician.
Elevated Work and Weather
•Exercise extreme caution when performing elevated work.
•Use appropriate equipment and safety practices.
•During installation and maintenance, keep tower and tripod sites clear of un-trained or non-essential
personnel. Take precautions to prevent elevated tools and objects from dropping.
•Do not perform any work in inclement weather, including wind, rain, snow, lightning, etc.
Maintenance
•Periodically (at least yearly) check for wear and damage, including corrosion, stress cracks, frayed cables,
loose cable clamps, cable tightness, etc. and take necessary corrective actions.
•Periodically (at least yearly) check electrical ground connections.
WHILE EVERY ATTEMPT IS MADE TO EMBODY THE HIGHEST DEGREE OF SAFETY IN ALL CAMPBELL
SCIENTIFIC PRODUCTS, THE CUSTOMER ASSUMES ALL RISK FROM ANY INJURY RESULTING FROM IMPROPER
INSTALLATION, USE, OR MAINTENANCE OF TRIPODS, TOWERS, OR ATTACHMENTS TO TRIPODS AND TOWERS
SUCH AS SENSORS, CROSSARMS, ENCLOSURES, ANTENNAS, ETC.

i
Contents
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1. Installation instructions for an enclosure that
includes a mains powered CS120A Power Supply .......1
1.1 Required knowledge.................................................................................1
1.2 Preparation and initial checks................................................................... 1
1.3 Wiring into the enclosure .........................................................................2
1.4 General use and access to the enclosure...................................................6
Figures
1. General View..............................................................................................3
2. Mains Connections.....................................................................................4
3. DC Connections .........................................................................................5

1
CS120A Power Supply Enclosure
Important Safety Instructions –please request a translation or further advice if you cannot
understand this document.
Wichtige Sicherheitshinweise - bitte kontaktieren Sie uns bzgl. einer Übersetzung falls Sie
Schwierigkeiten haben Inhalte dieses Dokumentes zu verstehen.
Consignes de sécurité importantes - N'hésitez pas à demander un avis ou une traduction, si vous
ne pouvez pas comprendre ce document
Instrucciones de Seguridad Importantes –solicite por favor traducción o asesoramiento
adicional si no entiende este documento.
Istruzioni di sicurezza importanti - chieda prego una traduzione o avanti il consiglio se non
potete capire questo documento.
Instruções de segurança importantes - por favor, solicitar uma tradução ou conselho mais se
você não consegue entender este documento.
1. Installation instructions for an enclosure that
includes a mains powered CS120A Power Supply
This document is supplied with an enclosure that includes a CS120A power supply
enclosure as it requires direct wiring of an AC, mains power source to terminals
inside this enclosure. The instructions below describe how to do this and
precautions for the use of the system after installation.
The CS120A power supply is sold as a kit that is normally fitted inside a standard
Campbell Scientific environmental enclosure often with other components such as
a datalogger or communications interfaces. The layout of each enclosure can
therefore vary, but the wiring details for the AC supply are standard. The power
supply is sized to have the capacity to power the CS120A with its hoods heaters on
and to charge one of Campbell Scientifics standard rechargeable power supplies,
e.g. the PS100 or PS200 supplies.
1.1 Required knowledge
The wiring of the enclosure should only be carried out by personnel qualified to
install electrical equipment relevant to the installation. For permanent
installations outside this usually requires a certified electrician who is also familiar
with local electrical and safety legislation. Some general guidance is given below,
but the responsibility for the installation lies with that installer.
1.2 Preparation and initial checks
Choice of site: unless otherwise stated, the enclosure supplied is designed
to be mounted in an area with restricted access, i.e. not accessible to
general public where it might be vandalised. If access is not restricted
please contact Campbell Scientific for further advice.

CS120A Power Supply Enclosure
2
The enclosure should be mounted to a fixed structure in accordance to the
general instructions for the enclosure or system supplied.
A mains power source needs to be identified and the type of termination,
cable type and cable run matched to comply with local regulations and the
type of installation.
The power source needs to be able to provide the correct voltage and
frequency and current in excess of the power requirement of the system.
See below.
Voltage requirements: 90-132 or180-264 V AC
Current requirements: 2.20 A at 115 V AC, 0.83 A at 230 V AC.
Input frequency: 47-63 Hz.
The power source needs to be fused. The fuse rating should be 3.15 A or
larger and an “anti-surge” design. The cable used should be capable of
carrying current in excess of that fuse rating.
The power source should be fitted with a two-pole isolator and should be
fitted as near to the enclosure as is possible.
The power cable needs to have three conductors, live, neutral and a
protective earth, normally with IEC wiring colours to match those used in
the enclosure.
This equipment requires a protective earth. THIS MUST BE
CONNECTED FOR SAFETY REASONS. Please ensure the earth
connection at the power source is suitable for this purpose.
This equipment also requires correct connection of the Live and Neutral
conductors –make sure these are identified and wired correctly at the
power source.
For outside installations the power source should be fitted with its own or
system wide earth leakage breaker (also known as an RCD).
1.3 Wiring into the enclosure
Fig. 1 shows a typical enclosure fitted with a similar power supply to that used for
the CS120A. The supply shown is a larger, higher output unit than normally
supplied, but the wiring arrangements are typical of the CS120A power supply. In
the picture there is a PS200, which is being charged by the main AC supply too.
The enclosure is fitted with a cable gland specifically for the mains cable entry.
This gland can be removed and replaced with an alternative which may be better
suited to the cable, e.g. if armoured cable and matching fittings are to be used.
The gland should be tightened on the cable and the cable fixed outside of the
enclosure to prevent accidental removal of the cable.
Inside the enclosure there is a DIN rail fitted with a clearly identified, separate
terminal block labelled L, N, E (the E may also have a protective earth symbol).
See Fig. 2. Existing wires from the internal power supply will already be
connected to one side of the terminal block and should not be disturbed. The
installer should prepare the cable, route and wire to the spare terminals on the
other side of the terminal block, matching the connections to the L, N and E
terminals.

Installation Guide
3
A clip is fitted to the chassis plate below the terminal block to allow the mains
cable to be fixed with a cable tie to give some strain relief.
Fig. 1. General View

CS120A Power Supply Enclosure
4
Fig. 2. Mains Connections
The earth terminal acts as the main protective earth input for the enclosure. This
will be connected to the chassis plate and also to an earth boss on the base of the
enclosure which is identified as a protective earth.
If local regulations allow and/or require, the earth boss can be connected to an
earth external to the enclosure either to provide a better external earth for transient
protection or to ensure all local earths are bonded together, e.g. the earthing point
of a tower.
The enclosure will often be fitted with a secondary block of terminals labelled 24V
DC and 12 V DC (Fig. 3). The 24V DC from the AC fed power supply is the
output used to power the hood heaters of the CS120A. The 24V supply is often
also used to provide charging power to a backup power supply for the
microprocessor (DSP) of the CS120A, such as a PS100 or PS200 which may be
installed in the enclosure. That supply may also be used to power a datalogger or
other peripherals.
Where a backup supply has not been ordered a 12 V output will not be present and
both the heaters and DSP should be fed from the 24 V DC outputs.
Where a PS100 or PS200 is used as battery backup for the DSP electronics it will
be able to run the sensor for over 30 hours in the event of mains power failure.
The hood heaters will not be powered though.

Installation Guide
5
Where PS100/200 is used for backup, do not leave the
CS120A connected to the 12V feed for extended periods
without the main supply connected otherwise the CS120A
may shutdown and/or the battery in the PS100/PS200 may
be damaged.
Please refer to the CS120A manual for more details of the low battery shutdown
settings.
Fig. 3. DC Connections
WARNING

CS120A Power Supply Enclosure
6
A spare set of terminals are sometimes fitted for wiring
communications cable in and out of the enclosure. Where a logger
and external connectors are fitted the cables from the external sensor
may be wired directly to the logger terminals. If a single CS120A is
in use the 12 and 24V power feeds may be wired directly to the
connectors in the enclosure wall.
After wiring, carry out any statutory tests on the earth bonding, before applying
AC power. When power is applied, if you have the equipment and qualifications to
do so, check the AC voltage at the DIN rail terminal block is within the range
specified on the equipment ratings label. Check the grey power supply has
powered on correctly by obvious status indicators on the front of the supply.
If a PS100/200 is fitted, connect the battery connector and turn on the power
switch on that supply.
On completion, shut the door and fit the padlock supplied. Please prepare and
leave any statutory documentation with the normal user of the system, including
details of how to isolate power to the enclosure.
1.4 General use and access to the enclosure
The enclosure is supplied with and should always be fitted with a padlock to stop
unqualified personnel opening the enclosure. The enclosure should be left locked
at all times.
If acceptable for the system operation, it is best practice to isolate the mains power
supply to the enclosure before opening the enclosure.
If this is not possible, only allow personnel with adequate training to open the
enclosure when it is powered on. Although the mains terminals provided are
“finger safe”, users should not attempt to adjust or amend any wiring in the
enclosure when it is powered on.
If the enclosure is supplied with desiccant this should be changed at the intervals
stated in the general manual for the enclosures, although if there are sources of
heat inside the enclosure the frequency they are changed can be reduced. The
power supplies inside this enclosure will generate some heat. Desiccant should still
be used though, especially if the external humidity is high.
If the enclosure, cables or ancillary equipment is damaged or has signs of moisture
ingress then the equipment should not be used and isolated from the mains supply.
NOTE

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