VIBRATION TRANSMITTER-VT7S12E
Ref No: mVTD/om/201
Issue No: 02
User’s Manual
- 5 -
2. INSTALLATION
Mounting method:
DIN Rail mounting
To install the controller select a location where:
no one may accidentally touch the terminals
mechanical vibrations are minimal
corrosive gas is minimal
temperature can be maintained at about 25
˚C to 35˚C and the fluctuation is minimal
no direct radiant heat is present
no magnetic disturbances are caused
no wind blows against the terminal board
no water splashed
no flammable materials are around
Turn off the power to the controller before installing it on the Din Rail because there is a possibility of electric shock
How to connect wires:
Before carrying out wiring, turn off the power to the controller and check that the cables to be connected are not
alive with a tester or the like because there is a possibility of electric shock.
NOTE:
o
All wiring must confirm to appropriate standards of good practice and local codes and regulations. Wiring must be suitable
for Voltage, Current and temperature rating of the system.
o
Provide power from a single-phase instrument power supply. If there is a lot of noise in the power line, insert an insulating
transformer into the primary side of the line and use a line filter on the secondary side. Do not place the primary and
secondary power cables close to each other.
o
Use repeater after each set of 32 instruments connected in RS-485 Communication.
o
Unused terminals should not be used as jumper points as they may be internally connected, which may cause damage to
the unit.
CAUTION:
High voltage transients may occur when switching inductive loads such as some contactors or solenoid valves. Through the internal
contacts, these transients may introduce disturbances which could affect the performance of the instrument.
For this type of load it is hi
ghly recommended that a “snubber” is connected across the normally open contact of the relay switching
though load. The snubber recommended consists of a series connected resistor/capacitor (typically
15nF/100 Ohms
). A snubber
will also prolong the life of the relay contacts. A snubber should also be connected across the output of a trip output to prevent false
triggering under line transient conditions.
