Power Supply Unit (Psu); Operator Interface/ Fascia; Figure 2-1 7Sr23 Dad With 3 + 8 Leds In E6 Case - Siemens 7SR23 DAD Manual

2.4

Power Supply Unit (PSU)

The relay PSU can be directly connected to any substation dc system rated from 30V dc to 220V dc.
2.5

Operator Interface/ Fascia

The operator interface is designed to provide a user-friendly method of controlling, entering settings and retrieving
data from the relay.
The fascia is an integral part of the relay. Handles are located at each side of the element to allow it to be
withdrawn from the relay case.
Relay Information
Above the LCD three labels are provided, these provide the following information:
1) Product name and order code.
2) Nominal current rating, rated frequency, voltage rating, auxiliary dc supply rating, binary input supply
rating, configuration and serial number.
©2013 Siemens Protection Devices Limited
Figure 2-1 7SR23 DAD with 3 + 8 LEDs in E6 Case
Chapter 1) 7SR23 DAD Description Of Operation
Chapter 1 Page 10 of 36