Section 2: Hardware Description; General; Case; Table 2-1 Summary Of Controller Relay Configurations - Siemens 7SR224 Technical Manual

Section 2: Hardware Description

2.1

General

The structure of the relay is based upon the Multi-function hardware platform. The relays are supplied in a size
E10 or E12 case (where 1 x E = width of approx. 26mm). The hardware design provides commonality between
products and components across the Multi-function range of relays.
Relay Current
Inputs
7SR2241 4
7SR2242 4
7SR2243 4
7SR2244 4
7SR2245 4
7SR2246 4
7SR2247 4
7SR2248 4
Table 2-1
Relays are assembled from the following modules:
1) Front Fascia with three fixed function LEDs, Function Keys and ordering options of configurable LEDs.
2) Processor module.
3) Analogue Input module - 4 x Current + 4 or 6 x Voltage.
4) Power Supply (PSU) and Basic Binary Input (BI) and Binary Output (BO).
5) Binary Input/Output Module.
6) Data Comms module (optional)
2.2

Case

The relays are housed in cases designed to fit directly into standard panel racks. The case has a width of 260mm
(E10), 312mm (E12) and a height of 177 mm (4U). The required panel depth for wiring clearance is 242 mm and
287mm to accommodate the bending radius of fibre optic data communications cables if fitted.
The complete relay assembly is withdrawable from the front of the case. Shorting contacts on the rear connection
block in the case ensure that the CT circuits remain short-circuited when the relay is removed.
External connections to the rear terminal block are made via M4 screws. Each terminal can accept two 4mm
crimps.
Located at the top rear of the case is a screw clamp earthing point, this must be connected to the main panel
earth.
©2010 Siemens Protection Devices Limited
Voltage Binary Output
Inputs Inputs Relays
6 13 14
4 13 14
4 23 22
4 33 14
6 23 22
4 33 14
4 33 30
4 43 22
Summary of Controller Relay Configurations
7SR224 Argus Description of Operation
LEDs Function Case
Keys
8 12 E10
8 12 E10
8 12 E10
8 12 E10
8 12 E10
16 12 E12
16 12 E12
16 12 E12
Chapter 1 Page 9 of 70