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Temperature Alarm Unit DG 3600

Control and Monitor Pt-Temperature Signals

The Alarm Unit DG 3600 is used to monitor limit values and regulate simple automation processes in temperature measuring applications with Pt-Sensors.

  • Easy selection of operating mode
    MIN/MAX alarm switch selectable, switch point and hysteresis adjustable on front panel
  • Relay with high power handling
    or wearless optocoupler switching output
  • True 4-port separation
    Protection against erroneous measurements due to parasitic voltages or ground loops
  • Switch state indicated by LED
    Easy to adjust the set point and hysteresis
  • Protective Separation acc. to EN 50178
    Protects service personnel and downstream devices against impermissibly high voltage
  • High reliability and long-term stability
    No maintenance costs
  • Unlimited use with 24 V AC/DC power supply
    Universally applicable for all measurement and industrial applications
  • 5 Years Warranty
    Defects occurring within 5 years from delivery date shall be remedied free of charge at our plant (carriage and insurance paid by sender)

High reliability and Protective Separation are essential characteristics that contribute to fault-free equipment operation.

Two switch channels can be separately configured. The switch point and the switch hysteresis can each be adjusted by means of their own 12-turn potentiometer located on the unit’s front panel. The switch state is indicated by a yellow LED.

The direction of effect and the mode of operation can be switched by means of DIP switch settings. Both switch outputs can be set up as either MIN or MAX alarms. The relay contacts switch high power loads either as N.O. or N.C. contacts.

Protective Separation and the 24 V AC/DC power supply make the DG 3600 universally applicable for all measurement and industrial applications, as well as for building automation.

Product line

Product line DG 3600
Devices Order No.
Temperature Alarm Unit with relay contacts DG 3600
Temperature Alarm Unit with transistor switches DG 3680

Data sheet archive:

The products are no longer available!

Technical Data


Sensor Input Pt100 Pt200 Pt500 Pt1000 (switchable)
Sensor current 1 mA 0.5 mA 0.2 mA 0.1 mA  
Sensor connection 3-wire connection / 2-wire connection, switchable
Wire resistor < 10 Ohm per wire
Temperature measuring range Zero -100 °C -50 °C 0 °C +50 °C (switchable)
Span 100 K 200 K 300 K 400 K (switchable)
Set point range 0 to 100 % of input range with 12-turn potentiometer, MIN/MAX-Alarm switchable
Hysteresis 0 to 60 % of final value with 12-turn potentiometer


DG 3200 (Relay):
    Contact type
    Switching cap. AC max.
    Switching cap. DC max.

2 SPDT relays, mode of operation switchable
250 V / 6 A     1500 VA
250 V / 0.2 A   115 V / 0.3 A   30 V / 6 A
Recommended minimum load 300 mW / 5 V / 5 mA
DG 3280 (Optocoupler):
    Contact type
    Switching capability

2 optocoupler transistor switches, mode of operation switchable
30 V DC, max. 50 mA
Switch state indicator Yellow LED
Response time Approx. 20 ms

General Data

Set point error < 0.2 % full scale
Temperature coefficient 1) < 150 ppm/K
Test voltage 4 kV AC, 50 Hz, 1 min., input against power supply against both switching outputs
2.5 kV AC, 50 Hz, 1 min., switching output I against switching output II
Working voltage 2)
(Basic Insulation)
600 V AC/DC for overvoltage category III and pollution degree 2 acc. to
EN 50178 between input, power supply and relay outputs. Up to
300 V AC/D between both relay outputs.
Protection against
electrical shock 2)
Protective separation according to EN 50178 by reinforced insulation up to
300 V AC/DC for overvoltage category II and pollution degree 2 between
input, power supply and relay outputs.
Power supply 24 V AC/DC, ± 15 % AC: 48 to 62 Hz, approx. 2 VA
DC approx. 1 W
Ambient temperature Operation
Transport and storage
–20 °C to +60 °C   (-4 to +140 °F)
–35 °C to +85 °C  (-31 to +185 °F)
EMC 3) EN 61326 -1
Construction 22.5 mm (0.89") housing, protection class: IP 20
mounting on 35 mm DIN rail acc. to EN 60715
Weight Approx. 100 g

Other measuring ranges on request.

  1. Average TC related to full scale value in specified operating temperature range, reference temperature 23 °C
  2. For applications with high working voltages, ensure there is sufficient spacing or isolation from neighboring devices and protection against electric shocks.
  3. Minor deviations possible during interference

Block diagram


Terminal assignments

  • 5, 6 Pt Input
  • 7 Pt Input
  • 8 Shield (opt)
  • 1, 2 Power supply 24 V AC/DC
  • 3, 4 Power supply 24 V AC/DC
  • 11 N/C
  • 9, 10 Output I
  • 12 N/O
  • 15 N/C
  • 13, 14 Output II
  • 16 N/O

Subject to change!

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