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3.- MAIN FEATURES
The LDP-XX-S are a four or six digits plus polarity (only minus) character remote display module. They accept
serial ASCII coded data into a differential or single ended line receiver, at common baud rates.
Numeric data and a selection of other characters can be displayed. The character set includes decimal point,
overload/alarm and negative sign. Simple messages e.g. Hi Al, Lo Al, °C, °F can be formed with characters
presentable on seven segment displays.
Units connected on a common data line may be individually addressed. This is achieved by sending code 03
followed by 02 (or XOFF XON), an address from 0 to 31 (ASCII 30 to 4F) and the data. The address 0 (ASCII
30) is common to all remote displays for simultaneous display of the same message.
The unit may be switch programmed to operate in a "strobed" mode whereby the data string is transferred to
the display on reception of a carriage return. Alternatively a "shift" mode can be used in which the characters
are displayed according to their current position in the input shift register.
Serie LDP-124-S : 4 digits type LED, seven segments, red or green colour with 57 mm (2.3") height and
minus sign for polarity.
Serie LDP-144-S : 4 digits type LED, seven segments, red or green colour with 100 mm (4") height and
minus sign for polarity.
Serie LDP-126-S : 6 digits type LED, seven segments, red or green colour with 57 mm (2.3") height and
minus sign for polarity.
Serie LDP-146-S : 6 digits type LED, seven segments, red or green colour with 100 mm (4") height and
minus sign for polarity.
The common features for all series are the following:
MECHANICAL.-
Housed in a rugged extruded aluminium profile housing for panel mounting or free standing.
Finished in anodized black colour. The frontal lens is mounted with a special rubber profile which
provides the front part of the unit with an IP-65 protection.
The product has been designed to fulfil a need for use in process control environments and the
characters are easily readable at large distances.
CONNECTIONS.-
Connections for Signal Inputs are made using one screw-clamp connector of four terminals located
on the rear part of the unit.
The recommended wire cross section for signal input is 1 mm
2
.
Connection for Power Supply uses a push-in cable connector with 2 terminals for power and 1
terminal for earth.
The fuse is located in the Power Supply socket, as well as the spare fuse.