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4 ½ digit LED Display with driver and RS485 serial bus User Manual Ver 1.1
System Description
General
The B14-45-485 display is a 41/2 digit 14mm LED display with an on board driver and RS485
(differential bus) communications. The display can be daisy chained in a multidrop manner with up
to 31 units on the same bus. Each unit has a 5 bit header for address selection. The host software
sends 5 bytes of information using a 2400 baud N,8,2 protocol which consist of the unit address
and the LED segment data. An address of 0Dh causes the LED display to update thus allowing
multi drop units to all change data at once independent of the update rate of the host.
Communications is via a 2 wire differential RS485 bus allowing use of the display remote from the
host controller. A single +5 volt supply is required. The LED display is a high brightness 14mm
character height, the driver facilitates dimming with an external potentiometer.
Pinout
1
0 Volt
Features.
• Serial interface with RS485 differential bus
• Single +5 volt supply
• Daisy chain up to 31 units on a single bus
• Address selection header
• Brightness programmable via external potentiometer
• Update all command
• 2400,N,8,2 signalling protocol
• Integral LED driver
• Excellent optical matching
Nexus Machines Ltd reserves the right to alter or withdraw the product specification and characteristics without prior notice at any time in line with
product development. Nexus Machines Ltd sole and exclusive warranty is that stated in the warranty article of the conditions of sale. Although every
effort is made to ensure this data is accurate no liability is accepted for errors or omissions that may affect the end product.
Week4902
B14-45-485
2
+5 Volt power
- 1 -
Dim
(mm)
A
B
C
D
E
Depth
3
A (RS485 bus)
B14-45-485
5.04
47.5
53.5
14.0
79.0
21.0
4
B(RS485 bus)
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Table of Contents
Summary of Contents for Nexus B14-45-485
- Page 1 • Excellent optical matching Nexus Machines Ltd reserves the right to alter or withdraw the product specification and characteristics without prior notice at any time in line with product development. Nexus Machines Ltd sole and exclusive warranty is that stated in the warranty article of the conditions of sale. Although every effort is made to ensure this data is accurate no liability is accepted for errors or omissions that may affect the end product.
- Page 2 Segment verses Databit mapping Nexus Machines Ltd reserves the right to alter or withdraw the product specification and characteristics without prior notice at any time in line with product development. Nexus Machines Ltd sole and exclusive warranty is that stated in the warranty article of the conditions of sale. Although every effort is made to ensure this data is accurate no liability is accepted for errors or omissions that may affect the end product.
- Page 3 Nexus Machines Ltd reserves the right to alter or withdraw the product specification and characteristics without prior notice at any time in line with product development. Nexus Machines Ltd sole and exclusive warranty is that stated in the warranty article of the conditions of sale. Although every effort is made to ensure this data is accurate no liability is accepted for errors or omissions that may affect the end product.
- Page 4 Please note that the technical support line is charged at £1.00 per minute Nexus Machines Ltd reserves the right to alter or withdraw the product specification and characteristics without prior notice at any time in line with product development. Nexus Machines Ltd sole and exclusive warranty is that stated in the warranty article of the conditions of sale. Although every effort is made to ensure this data is accurate no liability is accepted for errors or omissions that may affect the end product.
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