world clocks with calendar

Wharton Electronics LED digital clock time displays, large LED wall clock and outdoor large digital clocks, commercial clocks and industrial clocks

digital clocks and digital wall clocks and stopwatches

LED Digital Clock and Digital Wall Clocks Specifications

1974 - 2008
34 years of LED Digital
Clock and Digital Wall
Clock Manufacture

LED digital clock and digital wall clock specifications

features to top of page
Display

User selectable for 12 or 24 hour operation. Bright red, green, yellow or blue, colour matched and brightness selected LED characters. Ultra bright, daylight visible red or yellow/amber LEDs are available for SE models used for outdoor or very high ambient light conditions. The display brightness can be manually pre-set or controlled automatically.

The following optional display modes may be selected by the user:

alternating date and time, time and temperature and date, time and temperature display modes
alternating time-temperature alternating time - date
alternating temperature - time - date
note. temperature display requires optional 406 temperature sensor
when the digital clock is displaying time and temperature or time and date the interval between display changes is user adjustable.
Internal clock The internal time base is pre-programmed for leap years and the local automatic seasonal time changes can be programmed by the user.
Case construction Clock cases are finished in high quality brushed black or silver anodising and manufactured from aluminium extrusion and sheet. Digital Clock enclosures can also be supplied painted to any standard RAL colour as an extra cost option. Ten different case installation options are available for all applications.
Power supply The 400A series LED digital clock range can be supplied for operation from 110 or 230v 50/60 Hz ac supplies or from 12v, 24v or 48v dc supplies at extra cost. The operational location and supply voltage should be specified at time of order so that the unit is supplied with the correct mains connection.
 
stopwatch operation to top of page
simple stopwatch operation using external switches The digital clock can be user programmed to function as a simple stopwatch controlled by two user supplied, voltage free, switch contacts connected to screw terminals on the rear of the clock or internally in the case of .SE models.
The two switches function as stop/start and hold/reset controls. The display may be programmed to show a stopwatch count in hours, minutes and seconds (hours and minutes for 420A model) or minutes, seconds and 1/100 seconds (minutes and seconds for 420A model).
stopwatch operation using 496A control panel type 496A stopwatch control panel The 496A stopwatch control panel provides a convenient means of operating a 401A, 420A or 490A digital clock as a simple stopwatch. The 496A panel is fitted with sealed switches and is intended for flush mounting.
The panel is also available mounted in a hand-held case or in an enclosure suitable for wall mounting.
programmable stopwatch operation using 402A control panel type 402A stopwatch control panel The 402A stopwatch control panel enables 401A, 420A or 490A series LED digital clocks to be used both as multi-function programmable up/down stopwatches and as time-of-day clocks with the display freely switchable between time-of-day and stopwatch time. The following counting modes are programmable:
  • up from zero
  • count down from a pre-programmed start-time to stop at zero.
  • count down from a pre-programmed start-time and then up through zero.
  • continuously count down to zero with automatic restart from a pre-programmed start time.
 
case types to top of page
case code type
.S Standard surface mounting case complete with multi-angle mounting brackets
.FP Flush mounting case with a 6mm wide (0.25") front retaining bezel and supplied with adjustable rear mounting clamps for mounting in a control panel with rear access
.FB Flush mounting enclosure with a 6mm wide (0.25") retaining case bezel, with a steel mounting box for mounting in a solid wall
.DS Double sided clock for ceiling suspension, complete with supports for a drop of up to 1m - (39.4"). Support tubes for greater drops can be supplied at additional cost
.SS Single sided clock for ceiling suspension, with two support tubes for a drop of up to 1m - (39.4"). Support tubes for longer drops are available at extra cost
The following IP65 - NEMA 4X rated case type options are available for 401x.xSE and 420x.xSE outdoor clocks for weatherproof applications.
.SE IP65 rated surface mounting case supplied with multi-angle mounting brackets
.DSE Double sided IP65 rated case for ceiling suspension.
.SSE Single sided IP65 rated case for ceiling suspension.
.PSE Single sided IP65 rated case for pole mounting.
.DPSE Double sided IP65 rated case for pole mounting.
 
timekeeping & synchronisation to top of page
401x, 420x,and 490x series digital clocks will operate as stand-alone clocks or may be synchronised from a wide range of external time references.
Stand-alone operation When used in stand-alone configuration the digital wall clock maintains time keeping from a high stability internal crystal controlled time base. The clock can be user programmed for the appropriate local automatic seasonal time-change and is pre-programmed for leap-years.
Standard synch. modes
  • w482® time code
  • MSF & DCF radio time codes (requires 484 series radio time code receiver)
  • GPS satellite time signals (requires 488 series GPS time synchronisation sub-system)
  • alternate and single polarity 12-48v impulses
  • MB serial & MOBAline® time codes
Optional synch. modes
  • EBU or SMPTE time code - requires optional 404.E internal interface
  • IRIG-B and afnor NFS 87 500 time codes - requires optional 404.I module
  • NTP option allows synchronisation via an ethernet interface from a remote master clock or time source
Master mode 401x, 420x and 490x series digital wall clocks can act as a master to control up to ten 400A series LED clocks and calendar clocks as slaves when fitted with an internal 404.M module.
 
environment to top of page
Power supply  401x, 420x and 420x digital wall clocks will operate from a 110v - 240v 50/60Hz ac power supply depending on order specification. The power consumption is ‹0.2A @230v.
operation from 24v DC supplies is available at extra cost.
MTBF ›55,000 hours
Operating temperature Standard digital clocks for internal use: 0°C - 50°C
.xSE clocks with IP65 - NEMA 4X cases: -20°C +50°C
Relative humidity Standard digital clocks for internal use: 0% to 95% non condensing
.xSE clocks with IP65 - NEMA 4X cases: 0% to 100%
Accuracy
  • Stand-alone operation: 99.9998% @ 20°C ±3°C
  • Synchronised to DCF or MSF: within 25mS of UTC
  • Synchronised to GPS: - 1mS of UTC
EMC 401x and 420x LED digital clocks, comply with the European Community Electromagnetic Compatibility Directive 89/336/EEC (as amended by 91/263/EEC, 92/31/EEC and 93/68/EEC) and Low Voltage Directive 73/23/EEC (as amended by 93/68/EEC), when used and installed in accordance with our recommendations. They conform to the international standards:
  • EN 61000-6-1
  • EN 61000-6-3
  • EN 60950
Railway applications
EMC		 401A.12.x.xSE, 420A.12.x.xSE, 401A.170.x.xSE, 401A.170.x.xSE, 401A.220.x.xSE, and 401A.220.x.xSE, series large outdoor digital clocks with IP65 - NEMA 4X cases have been tested to conform with the Railway EMC standard:
  • EN 50121-4:2000
weatherproof clocks x.SE environmentally protected clocks are certified to IP65 - NEMA 4X and range models have been independently certified to:
  • EN 60529 - dust and water protection
  • EN 60068-2-1 cold temperature operation
  • EN 60068-2-2 high temperature operation
 
special applications to top of page
If you have a Digital Clock or Digital Wall Clock specification that is not covered by our wide standard range please contact our sales department.
 

Copyright 2008 Wharton Electronics Limited. All Rights Reserved
Wharton Electronics LED digital clock time displays, large LED wall clock and outdoor large
digital clocks, commercial clocks and industrial clocks