XU1-DC DC Voltage Relay

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The voltage relay XU1DC of the easy PROFESSIONAL LINE is a digital relay for voltage supervision of DC systems.

Type XU1DC1, with a nominal voltage range of 100 to 500 V, is mainly used for supervision of DC intermediate circuits, UPS batteries and station batteries.

Type XU1DC2, with a nominal voltage range of 24 to 60 V, can be used for the supervision of starter batteries, for example.

Connection XU1DC1
Connection XU1DC1

Connection XU1DC2
Connection XU1DC2

Voltage Protection

Parameter Setting Range
V< 50% … 110% × V n (cont.)
V> 90% … 150% × V n (cont.)
tV<, tV> 0 … 100 s (cont.)
Hysteresis for V<, V> 1%, 2%, 5%, 10%

Auxiliary Voltage

Voltage supply via wide-range power supply unit:

Auxiliary voltage range

50 … 750 V DC or

36 … 520 V AC (f = 35 … 78 Hz)

Power consumption

approx. 4 W (terminals A1 and A3)

Benefits of the Professional Line

  • Fast DIN rail mounting    easy and fast mounting
  • Sealable plastic covers    safe (see if anybody has broken the seal)
  • Super easy settings via front buttons    fast without computer
  • LED and output relays fault indication    easy to find out what has happened
  • Compact form factor    fits in small spaces
  • IT security    no way to attack via Ethernet
  • Robust and reliable    well proven reliable quality
  • Wide Range Power Supply    don’t worry about available supply voltage
  • Integrated Self-Test Procedure (via button)    fast and easy checks: relays, LEDs
  • For all relays except XD1-G and except XRI...: optional interface adapter XRS1 (order code XRS1A or XRS1*);

    for all XRI... [except XD1-G]: optional adapter RS485 to USB (order code RSC2485USB1):

      easy doing high precision settings via Windows ® PC software »Smart view«


  • Digital voltage relays for DC voltages.

Inputs and Outputs
Output relays 2
Protection ANSI
Voltage protection 27/59
Mounting Type
Housing suitable for DIN rail mounting

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