SMS SenTRI, Data And Installation Instructions, Page: 37 / 52

Keyswitch Interface /
MCP
The keyswitch units covered in this leaflet are suitable for
installation in SenTRI analogue addressable fire alarm system.
The product range covered here include:
¨
Keyswitch MCP (Red)
¨
Keyswitch Interface (Blue)
¨
Spare Keys (Pack of 2)
¨
Surface Back Box for Interface
Red Plastic (Pack of 10)
Keyswitch assembly
Back box
The back box has recessed centres 'D', 3 at the top and 1- at the
bottom, a maximum of 2 are usable.
Technical data
Standard EN54: Part 17
EN54: Part 18
Dimensions height 88 mm x width 88 mm
depth 32mm or 66mm when
surface mounted
Full assembly weight 128g - without backbox
192g - with backbox
Storage temperature -30 to 70ºC
Operating
temperature -25 to 70°C
Relative Humidity
(Non condensing)
Temperature
25 - 55°C up to 95%
Emission BS EN61000-6-3:2001
Residential, Commercial &
Light Industry
Class B limits
Immunity BS EN50130-4: Part 4 :1996
Ingress Protection IP43 estimated standard type
Colour Red (similar to RAL3020)
Blue (similar to RAL5015)
Case ABS engineering plastic
Indicators Normal
Active
Green LED for status and
find device application
Red LED for active or Fire
indication
Terminals 2.5mm
2
maximum
LPCB Approved -
Operating voltage 35V to 41V
EN54-17 data V
max
42V
V
nom
40V
V
min
24V
V
SO max
16V
V
SO min
8V
I
C max
0.4A
I
S max
1A
I
L max
20
m
A
Z
C max
0.1
W
37
SenTRI ONE System
Red enclosure
for Fire applications
(supplied with backbox)
Blue enclosure
for Plant interface applications
(supplied with backbox)
I I
88
15
32
Removable
Terminal block
O
I
88
36
THIS WAY UP
50
88
43,5
18,5
D
D
88