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2.4 Power supply for locks
The built-in power supply has four outputs each with a 1A quick blow fuse. Overall supply
is 4 A across these 4 terminals. 1 A is required for the ACU which leaves 3 A for locks.
These connections can be found on the small PCB (Output Distribution Board) top left of
the Unit.
Controller
Terminal
1+
1-
2+
2-
3+
3-
4+
4-
2.5 Locks
If the lock(s) are to
maximum peak current of 2A lock (Relays are rated at 2A 30 V) Note: the built in PSU
supplies 4A maximum, 1A generally is required for the ACU and readers etc., which
leaves 3A for Locks overall.
For more than 3A required for locks, then a separate power supply is required, modify the
wiring accordingly.
It is advisable to provide a rating of at least 50% more than the current rating of the Lock.
For example a 600mA lock should be allocated at least 900mA overall – thus 3 of these
rated locks could have power supplied by the built in PSU.
2.6 Suppression of Electrical Noise
CAUTION! : A suppressor MUST be fitted at the lock.
DC lock strikes must be fitted with suppression components i.e. diode plus capacitor or
MOV device (Metal Oxide Varistor). AC lock strikes must be fitted with a suitable
specialised suppressor, the TDSi suppressor provided is specialized and supports both AC
and DC locks - part number 4262-0095.
TDSI provide 2 suppressors each with the EXpert
EXpert
: Suppressors can be fitted are not polarity governed.
4
Equipment Connection
Connected to +12 V IN, Terminal 10 on ACU
PCB
Connected to 0 V, Terminal 11 on ACU PCB
Door lock Supply (up to 1 A max.)
Door lock 0 V
Door lock Supply (up to 1 A max.)
Door lock 0 V
Door lock Supply (up to 1 A max.)
Door lock 0 V
be powered from the built-in power supply - this is subject to a
EXcel4 Controller
Maximum 4 Amps
available across all 4
pairs of Terminals (1 A
required for ACU)
, EXpert
Slave EXpander and 4 with an
2
2
Page 13
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