More information about how a Panel Meters works in this link.
The RD4 and RD6 are 4 and 6 digit master/slave
displays providing remote readout from
instruments such as PLC's, digital panel meters and other
devices with serial output. Two
communication interfaces are supported in
remote Display: RS-232 and RS-485 can
be programmed through front panel
The RD4/RD6 remote display can
be mounted in a 1/8 DIN panel cutout, or
surface mounted with the included bracket.
The RD4 and RD6 feature big bright
21mm and 17.3 mm
9-segment LED's that can be programmed
to change colour between Green, Amber
and Red to indicate alarms. Serial
Connections can be made to an RJ-11
socket or screw terminals.
In the Slave mode, the RD4 and RD6 can
be used for displaying Alphanumerical
characters from a computer or any other compatible host device with a
serial RS232 or RS485 output.
The displays are powered from a 10 to 36Vdc power supply.
An optional AC Adapter for 230Vac to 12Vdc
(200mA). Is listed in the to-order table below.
† All amounts shown in EUR, GBP, or USD Ordering Example: (1) RD6 6-Digit Serial Input Remote Display. 1/8 DIN, £141.00 plus (1) CT485-ADAP-UK-W 230Vac to 12Vdc adapter with UK plug, £13.50, £141.00 + 13.50 = £154.50