mounted in security equipment cabinets.
2.5.3
Relay Terminal Equipment
Relay terminal equipment shall consist of electronic relays that switch the
power wiring for locking and control devices. Control relays shall be
optically isolated, solid state type devices, rated for at least 50 percent
more than connected load, capable of handling all connected load voltages,
and provide a minimum of 2500 volts root mean square (RMS) isolation. Group
and lace wiring with nylon tie straps, supported in intervals not to exceed
200 mm 8 inches and terminated on identified terminal blocks. Rack mount
relay terminal equipment in security equipment cabinets.
2.6
PROGRAMMABLE CONTROLLERS
Programmable controllers may be provided in lieu of discrete electronic
locking control for locking control, door monitoring, annunciation and
other specified functions. Controllers shall provide all necessary logic
functions, timing functions, input points, output points, memory,
communication capabilities and software for the operating features
specified in this section. Individual input/output, (I/O), interface
boards and I/O modules are considered part of the controller even if
physically separated. Controller shall be general purpose in nature and
not custom designed and built for an isolated application. Controller
shall not be location specific in its construction. Controller shall be
made location specific and operationally customized by installing EPROM
with applicable software and making the I/O interface boards system
specific by setting the proper address via DIP switches or plug-in headers,
and installing the proper I/O modules.
2.6.1
Logic Functions
Logic functions shall include, but shall not be limited to logical AND, OR,
and INVERT functions implemented in sufficient levels to provide specified
operating features. The logic shall be arranged in such a manner as to
prevent unsecure conditions from arising as a result of power failure to
part or all of the control power system.
2.6.2
Timing Functions
Timing functions shall include, but shall not be limited to on-delay,
off-delay, pulsing and stepping functions with programmable timing in
sufficient variations and quantities to provide specified operating
features.
2.6.3
Input/Output
The I/O modules shall be plug-in mounted on the I/O interface boards and
held securely by screw type fasteners. The I/O modules shall be solid
state devices providing a minimum of 2500 volts RMS (root means square)
isolation. Output point modules shall be rated for both voltage and load
of device controlled including constant duty and inrush currents. In the
event of power failure, output points controlling electrical locks and
gates shall fail in the secure condition, except shower points. Input
point modules shall be compatible with input device and voltage connected.
2.6.4
Software
System and operating software and fixed data base shall be contained in
SECTION 08745
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