Publicité
Les langues disponibles
Les langues disponibles
ANALOG OUTPUT OPTION
Introduction
Two ranges of analog output (0-10 V y 4-20 mA) can be incorporated to the MICRA M by means of an additional
card, either the NMV card for voltage output or the NMA card for current output, which is installed on the meter's
main board via plug-in connector M3, both cards, cannot be used simultaneously.
The outputs are opto-isolated with respect to the signal input and the power supply.
The optional board provides a two terminal connector [(+) and (-)] that drives out a signal variation from 0 to 10V or
from 4mA to 20mA proportional to a user-defined display range.
This way, the meter is furnished with a signal that can be used to control variables and operates at each moment
proportionally to the magnitude of the effect under control.
These signals can also be used to transmit display information to a variety of terminal equipment such as graphic
recorders, controllers, remote displays or other devices that accept input data in analog form.
The instrument will detect the type of option that has been installed and will operate in accordance.
The display values producing the full scale output (OUT-HI and OUT-LO) are also introduced via front-panel buttons
in the same programming module. The analog output then follows the display variation between the HI and LO pro-
grammed points.
The output signal can be set up for reverse action by programming the low display for the high output (OUT-HI) and
the high display for the low output (OUT-LO).
In case of 'display overflow', 'sensorbreak' or 'input error', the output signal (V or mA) can be configured to be fixed
at a high level 'Hi' or a low level 'Lo'.
INSTALLATION of NMA or NMV option
Lift out the electronics assembly from the case and use a screwdriver to pull on the junctions between the case and
the grey-marked area to detach it from the case. The so performed orifice will allow the analog output board connect-
or be brought out at the rear of the instrument. Install the circuit board so that the lower pin fits into the correspond-
ing main board insertion slot and push down to plug the M3 option connector in the main board M3 location. If the
instrument is to be installed in high vibrating environments, it is recommended to solder the card to the main board
making use of the copper tracks on both sides of the card pin and around the main board hole on its solder side.
WIRING
Each output card is supplied with an adhesive label that indicates the wiring connections of each option (see fig.).
To help identifying each terminal, this label should be placed in the lower side of the meter case, beside the basic
functions label.
KOSMOS SERIE
Cutout
zones
www.ditel.es
MICRA-M
NMA or NMV
95
Publicité
