DT9102 Intrinsically Safe Digital Clock

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)
  • IP 65 (front) IP 30 (rear) protected

The battery is included in the price, additional batteries can be ordered if necessary!

Type designation

DT9102 intrinsically safe digital clocks type designation

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 IP 65 protection from the front and IP 30 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 specifications

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:II
Intrinsical safety data:
Certificate:BKI 18 ATEX 0007 X
Protection marking:DT9102 B
II (1) 2G Ex ia IIC T5 (-20 °C < Ta < +60 °C)
DT9102 I4
II (1) 2G Ex ia IIC T6 (-20 °C < Ta < +60 °C)
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 (DT9102 I4)
Intrinsically Safe 4.5 V battery pack (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:DT9102: 144 × 72 × 73 mm (width × height × depth)
Weight:0.4 kg
Protection:IP 65 (front), IP 30 (rear)
Detailed information see in operating instructions. The Manufacturer maintains the right to change the technical data!


Leaflet of productOperating Instruction (DT9102 B)Operating Instruction (DT9102 I4)ATEX certificate

Application examples

DT9102-B intrinsically safe digital clocks application example

DT9102-I4 intrinsically safe digital clocks application example

Type selection and ordering

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