UST-4 Control and Signalling Terminal

Name: UST-4
Brand: IEL

Local operator panel and remote terminal for control, supervision and signalling of LV switchgear.

UST-4 combines the role of a local operator panel for multiple low-voltage switching devices with a remote terminal for LV installation control. It enables local control through a membrane keypad, remote control through communication and dynamic device-state signalling on multi-LED elements.

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Up to 4 LV switching devices

Local and remote operation of switching devices in an LV block.
MMI and remote terminal

Combines an operator panel with the base remote-control element for LV installations.
12 alarm channels

Programmable alarm channels with DIN 19235 or ISA sequences.
1 ms event registration

Events are chronologically registered with 1 ms resolution.
Dual communication

Communication with both SCADA and an individual switching device is possible.
NN DIALOG

Visualisation and remote control of the installation from a PC.

Switching device status: 8 (K1...K8)
General inputs: 12 (I1...I12)
Input type: voltage-free contact, NO or NC
Input supply: 48 V DC internal, galvanically isolated; external on request
Control outputs: 8 (O1...O8)
Relay outputs: NO contact, Umax 250 V, Imax 5 A
Breaking capacity: 200 V DC 80 W; 100 V DC 55 W; 50 V DC 50 W; 24 V DC 190 W
Communication: RS485 MODBUS RTU; optical 820 nm ST or 660 nm snap-in; Ethernet MODBUS TCP/IEC 61850
Parametrisation: RS232 or Ethernet
Power supply: 24, 48, 110 or 220 V DC +45% / -20%; 110 or 220 V AC +10% / -20%
Consumption: 10 VA
Temperature range: 0...+50 °C; extended -20...+60 °C
Mounting and dimensions: panel DIN 43700, 96 x 96 x 90 mm