Digital clock DT9102

LCDintrinsically safebattery-powered

Product features

• HH : MM display
• 25.4 mm character height
• ±1 minute accuracy per year
• Local or remote synchronisation
• 2 isolated alarm output
• Easy on-site configuration
• Battery powered or 4-20 mA loop powered versions
• Intrinsically safe (zone 1, 2)
• IP65 (front) IP30 (rear) protected
• The battery is included in the price, additional batteries can be ordered if necessary!

Product description
The DT9102 … Intrinsically Safe Digital Clock will accurately display local time in the hazardous area.
The clock incorporate a very high accuracy crystal oscillator that ensures less than 1 minute error per year (typically) at ambient temperature between 0-40 °C. Large 4 digit, 25.4 mm height liquid crystal display make the time visible at a distance.
Three different synchronisations mode are selectable in the user menu:

• Remote synchronisation through an intrinsically safe digital input at DT9102 B version.
• Remote synchronisation through control the 4-20 mA current loop at DT9102 I4 version: 4-10 mA current range is the normal operation mode and 14-20 mA current range is the synchronisation mode.
• Local synchronisation through the front panel push buttons.

The clocks has 2 isolated digital outputs, which can be used for alarm signalling.
The functional parameters can be set by the front panel push-buttons, through a simple menu system: time setting, synchronisation modes, time display mode, alarm output setting, etc. The settings are protected by a two-level password against unauthorised manipulation.
The instruments has two power supply versions: battery powered (DT9102 B) and intrinsically safe 4-20 mA loop powered (DT9102 I4).
The DT9102 … is housed in a DIN standard 144 × 72 mm ABS case with IP65 protection from the front and IP30 protection from the back side, for installation on the control panel.
The internal intrinsically safe battery will power the DT9102 B clock continuously for at least three years. Replacement battery units are available (BAT). At 20 °C replacement batteries only lose about one percent of their charge each year, so it is practical to stock a spare on-site. By replacing the battery or by switch off the 4-20 mA loop the clock save the time for 60 minutes.

Technical specification
Safety data: The connection terminals of the supply voltages are isolated from each other, the isolation is in compliance with the standard
EN 61010-1, taking into consideration the following:

• Pollution level: 2
• Measurement category: I

Intrinsical safety data:

• Certificate: BKI 18 ATEX 0007 X
• Protection marking: DT9100 B / DT9102 B: II (1) 2G Ex ia IIC T5 (-20 °C < Ta < +60 °C); DT9100 I4 / DT9102 I4: II (1) 2G Ex ia IIC T6 (-20 °C < Ta < +60 °C)

Display:

• Display: 4 digit LCD, 25.4 mm character height
• Time display: HH : MM
• Range: 00:00 - 23:59
• Error: ±1 min. / year @ 0 °C < Ta < 40 °C (typically)
• Display refreshing time: 1 sec.

Output parameters:

• Output: 2 digital outputs
• Output type: optically isolated passive switching transistor
• Load rating: 10 V, 16 mA max. (Ex safety data!)

Manual control:

• Manual control: 3 push-buttons on the front cover

Power supply:

• Power supply: Intrinsically Safe 4-20 mA loop-powered (DT9100 I4 / DT9102 I4); Intrinsically Safe 4.5 V battery pack (DT9100 B / DT9102 B)
• Maximum back-up time: 60 min.

Ambient conditions:

• Operating temperature range: -20 - +60 °C
• Relative humidity: 90% (max., non-condensing)
• Place of installation: potentially explosive area (zone 1, zone 2), safe area

Electromagnetic compatibility (EMC) accordance with the standard EN 61326

• Immunity: industrial area
• Noise emission: Group 1, Class B

General data:

• Housing: DIN standard ABS case, installable as a panel instrument
• Connection: push-in direct connections
• Connection cable: 0.25-1.5 mm2
• Dimensions: 144 × 72 × 73 mm (width × height × depth)
• Weight: 0.4 kg
• Protection: IP65 (front), IP30 (rear)

Detailed information see in operating instructions. The Manufacturer maintains the right to change the technical data!