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Siemens Heating and D.h.w. Controller RVL481 CE1P2541en
Building Technologies 31 Mechanical design 20.05.2008
31 Mechanical design
31.1 Basic design
The controller is comprised of controller insert, which accommodates the electronics,
the power section, the output relays and – on the front – all operating elements, and the
base, which carries the connection terminals. The operating elements are located be-
hind a lockable transparent cover. On the inner side of the cover, there is a holder in
which the operating instructions can be inserted.
All values are read in the display (LCD) featuring background lighting.
The cover can be sealed; cover and housing are provided with lugs for introduction of a
safety wire.
The RVL481 has standard overall dimensions of 144 × 144 mm.
It can be mounted in one of 3 different ways:
• Wall mounting
• Rail mounting
• Flush-panel mounting
Whichever mounting method is chosen, the base must always be mounted and wired
first. To ensure the orientation will be correct, the upper side of both the base and the
controller housing carry the marking TOP. Both the top and the bottom side of the base
have 5 knockout holes for cable entries, and there are 10 knock-out holes in the floor.
The controller insert is placed in the base. The controller insert has two fixing screws
with rotating levels. If, after insertion of the controller insert, one of the screws is tight-
ened, the lever engages in an opening in the base. When the screws are further tight-
ened (alternately), the controller pulls itself into the base so that it is secured.
The fixing screw at the bottom can be sealed: Insert the grommet (attached to the key
ring) in the screw hole, introduce a safety wire through the 2 lugs and seal.
31.2 Dimensions
139
951.5 (42.5)
18
16.4
26 26 26 26
15.3
1
4
4
144
144
36
72
106
108
50
36 29
35
39
39
106
14
4.5
max. 3
IEC 61554 - 144 × 144
35 ±0.3
EN 60715
max. 5
M16
EN 50262
22
max. 8
2540M01
138
+1
0
138
+1
0
Dimensions in mm
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