-PS POWER SUPPLY USER'S MANUAL
6
1. Introduction and Taking into Use
The PS power supply is designed for use with your moisture logger. It provides your meter with
electrical power and has a number of connectors for various user and process interfaces. In the
following find the proper use of each connector. For any details of use of the meter itself, refer to the
User's Guide.
PS is taken out of its package carefully and it should be inspected for any damage during shipping.
If any damage is visible, contact the manufacturer or the representative from which the unit was
bought. The following items should be available:
1.
PS
supply
2. User's guide (this)
3. Connection cables with connectors according to your meter
4. Wall supply cable with an IEC320 socket at one end
5. DIN rail mounting kit
6. Other optional items ordered
If something is missing, inform your dealer and he will ship any missing parts. The instrument is ready
for use after connecting the cables and power.
PS is a power supply giving 24 V 2 A continuously for your meter. It can supply 3 A temporarily for
starting the meter. Some power supplies are equipped with a 12 V output with double the current
capacity to better match requirements of the meter. The casing has a number of venting holes for
air circulation. The supply is intended for installation into either electrical cabinets or as an office
accessory.Ithas rubberfeetforcomfortabledesktopoperationtoo.Itisnotwatertightinanydegree
and should not be installed into such conditions where there is a risk of letting water inside. The supply
accepts any AC voltage between 85 and 240 Volts of 50/60 Hz. Also DC voltage is acceptable.
Check the unit's label for certifications and valid approvals. For wall power inlet, there is an IEC320
connector at one end of the supply. A suitable cable with the proper wall plug at the other end is
supplied. Minor variations may exist in this respect as conditions vary from country to country and the
plugs are often very different. There is also a cable fixed to the box which is for the moisture meter.
The other end of the cable carries either a Bulgin 8 pin connector (model A) or an ITT Cannon 12 pin
connector (model D). In some cases, there may be two of the Bulgin connectors and two cables,
especially if older moisture meter models are to be supported (model D). The rest of the cables for
various interfaces are to be connected to the specific connectors in the supply's box. This is
described in the following. Note that the power supply itself is identical for all models. Only the use
of each of these specific connectors may differ or the connector is not used at all. Also, the cables
and connectors are matched according to your meter model.
Connecting the Cables and Starting the Meter
Notice that the cable connectors in PS may have caps which protect them against dirt, depending
on the type of connector. The connectors are splash water proof. To keep them that way for the
operating life of the instrument and cables we ask the user to handle them carefully and to avoid
too much force while opening or closing. Else the sealing rings may be lost or threads or contact pins
may fail. Refer to Figures 1A to 1B for various cable connections in typical applications. In practice,
there are more possible combinations than these.
The cables are connected as follows. The Cannon 12 pin connector or Bulgin connector with 8 pins
go to the instrument socket. To separate the RS232/485 and Profibus DP cables from each other, they
