User’s Manual DRF Series
CAUTIONS, WARNINGS AND NOTES
INSTALATION
PRECAUTIONS.- The installation and the
future use of this unit must be done by qualified
personnel. The unit has not AC (mains) switch, neither internal protection fuse. It will be in
operation as soon as power is connected.
The installation must incorporate an external mains switch with a protection
fuse and also the necessary devices to protect the operator and the process when using the unit to a control machine or process where injury to personnel or damage to equipment or process may occur as a result of failure of the unit.
RECOMMENDED FUSES
24 Vdc | 230 Vac | 115 Vac |
250mA | 70 mA 100 mA | |
All |
| |
SAFETY PRESCRIPTIONS.- The unit has been designed and tested
under
has to respect in order to warrant a proper function of the unit, and good security
conditions. The unit is designed for internal applications, with good ventilation to avoid excessive heating. It can occasionally be applied to temperatures down to 10ºC or up to 70ºC
without security degradation. Do all connections before applying power to the
unit. Do not make wiring changes until power is disconnected from the unit.
Install the unit far from elements generating electric noise, or magnetic
fields, such as power relays, electrical
engines, speed regulators, etc. Do not use until installation is completed.
POWER SUPPLY.- The power supply must be connected to the adequate terminals 1, 2 and 3. The characteristics of the power supply are shown on the side label. Please make sure that the unit is correctly connected to a power supply of the correct
voltage and frequency. Do not connect the unit to lines which are overloaded or which
provide power to systems working on ON- OFF cycles or inductive loads.
ATTENTION : If the power supply is DC voltage, be careful with the polarity indicated for each terminal.
SIGNAL WIRING .- Certain considerations must be given when installing the signal input wires. If the wires are long, they can act as an antenna introducing electrical noise into the unit. Therefore :
Do not install the signal input wires in the same conduit with power lines, heaters,
solenoids, SCR controls, etc ... and always far from these elements.
When shielded wires are used, leave unconnected the shield on the transmitter
side and conect the other end of the shield to the ground terminal of the machine.
EXCITATION VOLTAGE.- Model
external power supply, beacuse both units will be permantently damaged.
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