Metal Keypad
KY2250 RS485 Metal Keypad With LED Display
KY2250 is a brushed SUS304 stainless steel keypad with an integrated LED display that shows 22 numbers or some characters, communicating over RS485 at 9600bps.
Product Overview
KY2250 is a brushed SUS304 stainless steel keypad with an integrated LED display that shows 22 numbers or some characters, communicating over RS485 at 9600bps. The wide DC 7V to 16V supply and addressable 485 bus suit installations where several panels share one cable run back to a controller. LED colour can be customized and the unit works in low temperature environments.
- RS485 with a settable address lets multiple panels share a single bus back to the controller
- A DC 7V to 16V input tolerates the voltage drop on long field cabling
- The built in display shows 22 numbers or characters so no separate readout is needed
- LED colour can be customized to match the rest of the equipment
- Brushed SUS304 stainless steel is anti-riot and anti-corrosion
Application Scenarios
- Multi panel installations sharing one RS485 bus
- Industrial equipment needing local numeric readout
- Cold environment installations
- Long cable runs where 5V supply would drop too far
- Operator stations requiring keypad and display in one cutout
Who It Is For
- Industrial controls engineers building RS485 networks
- Equipment OEMs needing keypad and display in one panel
- Integrators working in cold storage or unheated sites
Problems It Solves
- Separate keypad and display modules need two cutouts and two cable runs
- Point to point serial links cannot address multiple panels on one bus
- Long field cables drop a fixed 5V supply below the usable range
- Standard panels are not rated for low temperature use
Technical Features
- RS485 interface protocol with a settable communication address, default 0x01
- Display of 22 Numbers or some characters
- Baud rate 9600bps with no parity and 1bit stop bit
- Power supply of DC 7V to 16V
- Brushed SUS304 stainless steel panel, anti-riot and anti-corrosion
- Customizable LED colour
- Suitable for use in low temperature environments
Specifications
| Interface Protocol | RS485 |
|---|---|
| Power Supply | DC 7V to 16V |
| Display | 22 Numbers or Some Characters |
| Baud Rate | 9600bps |
| Parity Bit | None |
| Stop Bit | 1bit |
| Default Address | 0x01 |
| Panel Material | Brushed SUS304 stainless steel |
Materials
- Brushed SUS304 stainless steel panel
Manufacturing Process
- Brushing of the SUS304 panel
- CNC machining of key apertures and the display window
- LED display module assembly in the selected colour
- RS485 board assembly and address programming
- Communication and display verification
Quality Control
- RS485 communication test at 9600bps with the default 0x01 address
- Display segment check across all 22 positions
- Supply voltage test at both ends of the DC 7V to 16V range
- Low temperature operation check
- LED colour match against the approved sample
Customisation Options
- LED colour selected to match your equipment
- Communication address set through the command set
- Key layout and legend content
- Panel outline and display window position
- Cable length and RS485 termination
How It Compares
| USB or PS/2 keypads | RS485 addressing allows several panels on one bus over long cable runs |
|---|---|
| Keypads without a display | The 22 character LED readout removes the need for a separate display cutout |
| Fixed 5V keypads | A DC 7V to 16V input tolerates voltage drop across long field wiring |
Use Guide
- Set each panel to a unique 485 address through the command set before commissioning
- Configure the host port for 9600bps, no parity and 1bit stop bit
- Supply between DC 7V and 16V at the panel end of the cable
- Specify LED colour at order stage since the module is fitted in production
- Confirm the display window position against your fascia layout
Questions About This Model
What communication protocol does KY2250 use?
RS485 at 9600bps with no parity and 1bit stop bit.
What does the display show?
22 numbers or some characters.
What is the supply voltage?
DC 7V to 16V.
Can the bus address be changed?
Yes, the 485 communication address can be set through the command, with 0x01 as default.
Can the LED colour be changed?
Yes, LED colour can be customized.
Does it work in the cold?
It can be used in low temperature environments.
Request A Quote On KY2250
Tell us quantity, interface and mounting method. Drawings and panel cutouts are welcome by WhatsApp or email.