Unit installation
719S 2 Door Switching Unit
2
A maximum of 20, 500X series telephones can be powered directly from a 719S unit.
For up to 60 telephones an additional M440 PSU must be used. Refer to diagram 6.
For larger systems contact your distributor or the manufacturer for further
guidance.
ELECTRIC LOCK RELEASE
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.
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). As illustrated in diagram 1 or 2 the egress button is connected to
the 719S switching unit using the terminals marked 'EXIT'.
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 & 2, 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
Some models of telephone (500LX, 500LXT, 500PLX & 500PLXT) have a green LED
indicator to show the status of the entrance doors; 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) which
has normally-open contacts (ie when the door is closed). The switch is connected to the
terminals marked 'DOOR SW' on the 719S unit - refer to diagram 2.
SYSTEMS WITH 3 OR MORE DOORS
One 719S unit is required for every two doors up to a maximum of eight doors (e.g. 5
doors requires 3 x 719S units). Refer to diagram 3 (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.