Frequency Large Display Indicator

Large Display Indicator measures the frequency from input supply or 4-20mA or shows the received frequency data from other equipment. It meets high accuracy of 0.1% to measure Frequency. This is made intended to see the frequency from long distance. It is equipped with high bright red color 7 segment displays. These are commonly used in Power plants, Substations, Manufacturing units and Field environments to provide direct frequency measurements of various devices.


  • High Bright 7 segment Display to view from long distance.
  • It can measure frequency from supply voltage or 4-20mA current.
  • It measures the frequency with accuracy of  0.1%.
  • Available in 50mm, 100mm & 300mm sizes
  • It can show the frequency value received through Ethernet or RS485/RS232 signals.
  • Input power supply can be customized
  • 10/100Mbps is the speed for Ethernet input.
  • Power Over Ethernet option available
  • Wireless display option available with limited range.
  • Rugged and Robust display.
  • Isolated and protected Interfaces.
  • Cabinets made up of MS/SS/Aluminium
  • Cabinet finished with powder coated
  • Wall / Panel / Table top mountable.
  • Protection class from IP 20 / IP 55 available.
  • Front plate covered with Red color acrylic sheet


  • Power Plant
  • Substation
  • Industries
  • Educational institute

Technical Specifications

Power Supply
Standard 100V to 270V AC, 1φ, (47Hz to 63Hz)
or 100V to 370V DC
Custom 36V to 72V DC (48V), 18V to 36V DC (24V)
Power Consumption <10W
Note: Only 100V – 270V AC supply for Line frequency display
Display Type 7 Segment Display
No of Digit 5 Digit
Format XX.XXX
Display Size 50mm/100mm/300mm
Color Bright Red
Input Signal
Voltage Input* Voltage   : 63.5VAC or 230VAC
Value     : Cal.range should specified
Connector : Pluggable Terminal block
Current Input* Current   : 4-20mA
Value     : Cal.range should specified
Connector : Pluggable Terminal block
Ethernet Input* SANDS will provide software to install in SCADA server
Connector : RJ45
Speed     : 10/100Mbps
RS485/RS232 Input* Customer should specified the protocol, Baudrate, Data bit, Stop bit & parity
Connector : Pluggable Terminal / DB9
Wireless Input* Input     : Wireless Antenna
SANDS Wireless transmitter must used
Operating Temp 0°to 50°C
Humidity 95% Non Condensing
Enclosure Wall/Panel/Table Top Mountable
Dimension 50mm Display – 484mm x 100mm x 74mm
100mm Display – 750mm x 56mm x 170mm
300mm Display – 1620mm x 56mm x 360mm
Protection Class IP20, IP55*
Note: * Optional

Ordering Information:

SLD-1010-FRQ- <Size> – <Input Signal> – <Supply Voltage>

Size Input Signal Supply Voltage
50mm – 050
100mm – 100
300mm – 300
63.5VAC (Cal. Range to be specified) – 01
4-20mA (Cal. Range to be specified) – 02
Ethernet (SANDS will provide software) – 03
RS485 (Protocol must provided) – 04
RS232 (Protocol must provided) – 05
Wireless (SANDS Wireless transmitter to be used) – 06
230VAC (Line Frequency) – 07
100V-270V AC/100V-370V DC – 01
18V – 36V DC – 02
36V – 72V DC – 03
POE (Power over Ethernet) – 04
230V AC – 05