PT113
Instruction Manual
7
4 INSTALLATION
4.1 GENERAL RULES
Warning:
Please read this manual carefully before installing the instrument. Applying the
recommendations in this section will increase your system reliability and long term performance.
Control Cabinet
The control cabinet should be designed so that PT113 can operate safely and with best performance.
The panel should be placed in a clean area, out of direct sun light if possible, with a temperature
between -15 ºC and +40 ºC and humidity not exceeding 85%RH, non-condensing. All external cables
should be installed securely to avoid mechanical damage.
PT113 instruments are very low level signal measuring instruments. To avoid electrical noise they
should be separated from any equipment that produces electrical noise.
•
It is preferable to use metal cabinets to protect against radio frequency interference and ensure
the cabinet is connected to ground.
•
Load cell cable trays must be separated from others, if possible, as power or motor control
cables can cause interference.
•
If there is noise-generating equipment, such as heavy load switches, motor control equipment,
inductive loads etc., please take care to protect against EMC interference in the cabinet and if
necessary protect PT113 instruments with a Faraday cage or install them well separated or in a
separate section well away from this kind of equipment.
•
Connect parallel reverse diodes to the DC inductive loads like relays, solenoids etc. to minimize
voltage peaks on the DC power supply.
•
If the condition of your plant electrical supply fluctuates or is subject to noise and interference,
prepare a special power line and grounding.
•
Good quality grounding of the instruments will improve weighing accuracy and the safety of
your indicator.
Cabling
All cables coming to the control cabinet should be shielded. Please use separate cable trays for these
low signal level cables. The distance from load cell cables, interface cables and DC power supply
cables to mains power line cables must be minimum 50 cm unless they are installed in a properly
grounded steel conduit or you could experience a reduction in performance.
Warning:
Please always remember that PT113 instruments are very low voltage measuring
instruments. Your control cabinet design and proper installation increases reliability and performance of
the instrument. Please do not forget that the instrument must be powered off before inserting or
removing any peripheral connector.
4.2 MECHANICAL INSTALLATION
The PT113 indicators are DIN rail mounted, dimensions are shown above PT113 Dimensions.
4.2.1 CONNECTIONS
Connections are made with connectors to the lower side and front panel, as shown below. Allow
adequate clearance for connectors and cable. The lower side grey connectors slide in from the side and
may be already installed on the PT113. Serial port connections for the PT113MB are on the front panel.
PT113MB
Power connector.
PT113EN, PT113PB, PT113PN, PT113CO
Power and RS232C connectors.
Install the transmitter onto the DIN rail from the front with the panel fixing accessories supplied. Be sure
