719S 2 Door Switching Unit
PD-008 Iss 6
Installation & Operation Manual
Page 4 of 20
A maximum of 20 BS-LX telephones can be powered directly from a 719S unit. For up
to 60 telephones an additional PS4 PSU must be used. Refer to diagram 6.
For larger
systems contact your distributor or the manufacturer for further guidance
.
Electric Lock Release / Maglock
Either fail-secure (AC/DC) or fail-safe (DC only) type electric lock releases can be
operated directly from the 719S Switching unit. Use the 'FAIL SECR' connections for
fail-secure releases. Use the 'FAIL SAFE' connections for fail-safe releases and
magnetic locks. The Lock outputs are rated at a maximum current of 0.5A. A suitable
transient suppressor must be fitted across or in any Maglock used.
Egress Facility
An 'egress' button may be installed, on the inside of each door, to allow residents to
freely exit. Momentarily pressing this button will operate the lock release for a fixed
period (3 - 20 secs). The egress button is connected to the 719S Switching unit using
the terminals marked 'EXIT' and should be ‘push to make’, refer to diagrams 1 or 3.
Tradesman Facility
The entrance panels may be ordered with an optional 'Tradesman' button to allow free
access during certain hours (used in conjunction with a time-clock). Momentarily
pressing this button will operate the lock release for a fixed period (3 - 20 secs). As
illustrated in diagrams 1 or 3, the tradesman's button should be connected in series with
the isolated contacts of a Time clock and then to the 'EXIT' terminals of the switching
unit.
Door Status Indication
The BS-LX model of telephone has a green LED indicator to show the status of the
entrance door(s); the indicator illuminates when one or more of the doors are open. The
door must be fitted with a suitable switch (rated 1.0A @ 12V for 60 phones).
If the door contacts are closed when the door is closed the contacts should be wired in
series and then connected into the ‘DOOR SW’ terminals on the 719S for DOOR 1 only.
If the door contacts are open when the door is closed the contacts should be wired
separately in to the ‘DOOR SW’ terminals on the 719S for the associated door.
Refer to diagram 7.
Systems With 3 or More Doors
One 719S unit is required for every two doors up to a maximum of 16 doors (e.g. 5
doors requires 3 x 719S units). Refer to diagram 2 (AC telephone models) or diagram 4
(DC telephone models).
A separate power supply is required for each 719S unit.
The 719S units should be
installed no more than 2 metres apart
(unless using 2 Level Gate and Block wiring,
