Bell Bell-DDA Leaflet
Flats
Electrical Cupboard
Door Panel
Firs t
Ph one
Z
I
R
O
T
Second
Ph one
Z
I
R
O
T
203, 204
Lock Release
BELL-DDA
Wiring for BELL-DDA Systems
13:44
56
-
+
CO
NO
NC
TS2000-BST
Time Clock
Bell
System
340/PS4
Power Supply
PD-085 Issue 4
T
O
-
R
+
H
C
Z
DDA
Interface
PCB
2
T
O
R
H
C
61
Speech
Unit
-
LOCK
Trades
Button
(optional)
+
Telephone Models:
801 801S 801PS
500D 500PD
801 801S 801PS
500D 500PD
I
1
I
2
I
3
To Additional Telephones
(Telephones) Ltd
www.bellsystem.co.uk
*
*
A model PS4 Power Supply must be used above 6 way
or on systems with more than 1 phone per flat / button.
B
These 2 Cores
1.0mm CSA
Minimum
2