Siemens Argus 7SR21 - Section 3: Dimensions and Panel Fixings; Relay Dimensions and Weight

7SR21 & 7SR22 - Installation Guide
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Section 3: Dimensions and Panel Fixings
3.1 Relay Dimensions and Weight
Relays are supplied in the modular size E6, E8 or E12
The following drawings are available which give panel cut-out and mounting details.
NOTE:
THE 3.6 HOLES ARE FOR M4 THREAD FORMING (TRILOBULAR) SCREWS. THESE ARE SUPPLIED AS STANDARD AND ARE SUITABLE FOR
USE IN FERROUS / ALUMINIUM PANELS 1.6mm THICK AND ABOVE. FOR OTHER PANELS, HOLES TO BE M4 CLEARANCE (TYPICALLY 4.5
DIAMETER) AND RELAYS MOUNTED USING M4 MACHINE SCREWS, NUTS AND LOCKWASHERS (SUPPLIED IN PANEL FIXING KIT).
2) ACCESS CLEARANCE REQUIRED FOR OPTIONAL ETHERNET COMMS MODULE RETAINING SCREW
Case Earth connection
TOP VIEW
Optional
ethernet
comms
module
FRONT
See note 2
PANEL CUT-OUT
168
130
150
159
10
Diameter 3.6 - 4 holes (see note)
FRONT VIEW
155.5
177
SIDE VIEW
31 216.5
151.5
11
Case Earth
connection
Typical
when
fitted
MINIMUM CLEARANCES:
25mm FOR TERMINAL WIRING
45mm FOR ETHERNET COMMS MODULE
70mm FOR F/O COMMS CABLE
75 mm MIN
CLEARANCE
FOR ETHERNET
COMMS WIRING
Figure 3.1-1 Overall Dimensions (mm) and panel Drilling for Size E6 Epsilon case