Minebea Intec PR1625/60, Instrument Manual

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Instrument Manual PR1625/60
Minebea Intec EN-5
1 Description
The PR1625/60 is a unit to intrinsically safe interface electrical equipment situated in a hazardous (Ex) area
with electrical equipment situated in a safe area.
It is classified to be an associated apparatus (with intrinsically safe circuits) and complies with class
[EEx ib] IIB or [EEx ib] IIC. The Certificate of Conformity is to be found under chapter 8.
The instrument can be used for weighing applications as well as for all other applications which require this
kind of intrinsically safe interfacing.
The instrument safeguards, that even in the event of a defective circuit, there is no electrical energy
transfered to the hazardous (Ex) area which exceeds the permissible limits.
This is realized by the use of
-
special optocouplers for serial and digital in- outputs, and
- special circuits with zener diodes and transistors for voltage and current limiting in the power supply
section.
The unit provides the intrinsically safe interfacing of:
-
Supply voltage output 12 V DC/
≤
120 mA for the supply of peripheral equipment in the Ex-area.
- Bidirectional serial interface with current loop interface to the Ex area and alternatively RS-232 or
RS-422/485 or 20 mA current loop in the save area.
- One digital control signal TXE (transmit enable) for the serial interface from the Ex area, if the serial
interface at the side to the safe area is connected to a bus system.
- Two digital control signals from the Ex area to the safe area.
At the side to the safe area the serial interface and the digital inputs can be supplied
-
either by the intrinsically safe power supply 12 V DC of the PR 1625/60,
- or by an external intrinsically safe power supply unit.
When using an external intrinsically safe power supply unit, all interfaces at the side to the Ex area have to
be supplied externally.
Caution!
Mixing of internal and external supply is strictly forbidden.
Please observe, when supplying all interfaces to the Ex area by the PR 1625/60 internal power
supply 12 V DC, only approx. 50 mA will remain for the supply voltage output itself.
The housing of the PR1625/60 contains provisions for wall or rail mounting according to DIN EN 50022.
The interface can be supplied by either 24 V DC or AC power supply.
Connections are to be made via screw terminals up to 4mm
2
.
Terminal PE must be connected to the potential equalization system, which has to be installed and earthed
according to VDE 0100 and its part 540, or/and acc. to respective local regulations.