Alarm Unit DG 3200

Control and Monitor Standard Signals

The Alarm Unit DG 3200 is used to monitor limit values and regulate simple automation processes in 0(4) to 20 mA and 0 to 10 V standard signal circuits.

  • 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)

The Alarm Unit DG 3200 is used to monitor limit values and regulate simple automation processes in 0(4) to 20 mA and 0 to 10 V standard signal circuits.

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 3200 universally applicable for all measurement and industrial applications, as well as for building automation.

Technical Data


Input signal 0(4) to 20 mA, ± 20 mA, 0 to 10 V, ± 10 V
Input resistance Current input
Voltage input
Approx. 5 Ohm
Approx. 1 MOhm
Overload Current input
Voltage input
≤ 200 mA
≤ 250 V
Set point range 0 to 100 % of input range with 12-turn potentiometer , MIN/MAX-Alarm switchable
Hystersis 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 switching outputs. Up to 300 V AC/D between both switching 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 switching 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
  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 Input + current 11 N.C.
6 Input - current 9,10 Output I
    12 N.O.
7 Input + voltage    
8 Input - voltage 15 N.C.
    13,14 Output II
1,2 Power supply ~ 16 N.O.
3,4 Power supply ~    


Product line

Devices Order No.
Alarm Unit with relay contacts DG 3200
Alarm Unit with transistor switches DG 3280
Subject to change!
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