Operating Modes

The following standard operating modes of operation can be selected by the user

• 12 or 24 hour time display

• Automatic forward-backward seasonal time correction with selection of British, European or US change-over times.

• Automatic or manual preset brightness control.

• Stand-alone operation with time derived from the internal quartz crystal oscillator and a typical accuracy of better than one second per week from 20-25 °C.

• User selection from over 30 different types of slave operation including synchronising control by alternate and single polarity impulses, EBU/SMPTE time code, GPS and radio time codes, IRIG-B/Afnor NFS 87 500 time codes, MB serial and MOBALine® time codes, serial ASCII messages at RS232 or RS485 signal levels in a wide range of formats and data rates and control using w482® time code to display time from one of fifteen different time zones.

• Optional low-cost internal interface cards are required for EBU/SMPTE, IRIG-B/Afnor NFS 87500 and RS232/RS485 operation. DCF or MSF radio time code or GPS satellite synchronisation requires the appropriate receiver.

• Alternating time and temperature display mode with user selection of display change rate (requires optional type 406 temperature sensor).

• Alternating time and date display.

• Operation as a simple stopwatch using a type 496A stopwatch controller.

• Operation as a multifunction split-action up-down stopwatch with pre-programmed down-count start time, switchable between time-of-day display and stopwatch time, when connected to a type 402A up-down stopwatch controller - please follow this link for further information. The optional 404.S module provides a voltage free relay contact closure to signal the end of a count-down cycle

Case Types

The 400A range of clocks are supplied in precision engineered cases manufactured from high quality aluminum extrusion. 

401A.02 models have DIN style panel mounting cases, finish in matt black anodising and supplied with rear mounting clamps.

Larger 401A models have cases finished in high quality brushed black or silver anodising or may be painted, at a small additional cost, to any required standard RAL or BS colour. They are available in the following case styles:

•  .S. ~ for surface mounting supplied with multi-angled mounting brackets..

• .FP. ~ with a flush fitting case suitable for mounting in a control or other panel with rear access.

• .FB. ~ with a flush fitting case and mounting box for mounting in a solid wall.

• .SS. or .DS. ~ as a single or double sided unit with support tubes for ceiling suspension.

• .SE. ~ with a weatherproof case protected to IP65.

Power Supply

110v or 230v 50/60Hz operation as standard. 12, 24 or 48v dc operation at extra cost. An automatically re-charging internal battery maintains timekeeping in the event of a mains power failure.

Synchronisation

All 400A series clocks may be configured by the user for synchronisation from a wide range of external signals. In some cases optional wBus® interface modules must be specified at extra cost to enable correct operation. Radio time code and GPS signals require the use of the appropriate receiver system.

• Alternate polarity or uni-polar impulse signals of 6-48v amplitude with a one second, half minute or one minute repetition rate.

• w482® time code from a 482 series master in one of up to 15 different time zones.

• w482® time code in a single time zone from a 400A series clock fitted with a 404.M internal interface module.

• DCF or MSF radio time code signals via a 484 series radio time code receiver. The time may be display either as local time or UTC.

• IRIG-B time code as a 1KHz amplitude modulated 1-3v p-p signal. This functions requires an optional 404.I internal interface module.

• Afnor NF S 87 500 time code as a 1KHz amplitude modulated 1-3v p-p signal. This functions requires an optional 404.I internal interface module.

• EBU/SMPTE time code. This functions requires an optional 404.E internal interface module.

• RS232 serial ASCII time messages in one of three formats at user selectable baud rates, bit lengths and parity formats. This functions requires an optional 404.2 internal interface module.

• RS422/RS485 serial ASCII time messages in one of three formats at user selectable baud rates, bit lengths and parity formats. This functions requires an optional 404.2 internal interface module.

• H310 Time code

• MOBALine® time code.

• GPS satellite time code via a 488GPS satellite time code receiver system.

Output Signals

All models may be fitted with wBus® output modules to enable the clock to function as time signal source.

When fitted with the optional 404.2 (RS232) or 404.4 (RS422/485) wBus® interface the clock will provide serial ASCII time messages in one of seven different message formats.  Each message format may be transmitted at a 1200, 2400, 4800 or 9600 baud rate with odd or even parity and seven or eight data bits. The clock may be programmed to transmit the time message every second, on receipt of an ASCII ‘T’ character or on the closure of an external switch contact.

When fitted with an optional 404.M wBus® interface the clock will function as a master clock to control up to ten other 400A series clocks or calendar clocks.

Safety & EMC

401A series clocks, when used in accordance with our recommendations, comply with the European Community Electromagnetic Compatibility Directive 89/336/EEC and Low Voltage Directive 73/23/EEC and conform to the following standards:

Please contact us for information on our CSA approved and UL recognised models.

Environment

Operating temperature:	0-50ºC
Altitude:	0-3,000m   0 - 10,000ft.
Relative humidity:	0%-95% (non-condensing)
Accuracy    Stand-alone operation:    Locked to DCF or MSF:    Locked to GPS:	99.9998% @ 20°C typically within 20mS of UTC typically within 1mS of UTC
MTBF:	>50,000 hours

Download 401A and 420A Datasheet

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