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COM Specifications
The central output module (COM) satellites, where indicated
and shown on the drawings, shall be the Rain Bird COM two-wire
or COM Link models.
The satellites shall be capable of converting field controllers
of any manufacture to satellite controllers, which are then
capable of operating with Rain Bird central control systems.
The satellites shall also be capable of being installed and
operated using a
Rain Bird central control system without being attached to
existing field controllers.
The converted or existing field controller will be referred
to as the "host" controller for this spec. The COM
module shall be microprocessor-based and solid state, with
PC board modular construction for customizing each satellite
to meet the specific requirements of the host controller.
The COM satellites shall incorporate a motherboard, a communication
PC board, a central processing PC board and station output
PC boards. The COM shall come in 12- or 16-station base units
and be capable of having additional station output PC boards,
adding up to a maximum of three (3) total. These station output
PC boards may be of any combination of 12-station and 16-station
units. Thus it is possible to provide station outputs for
12, 16, 24, 28, 32, 36, 40, 44 and 48 stations.
All COM satellites shall be completely year 2000 (Y2K) compliant
and will continue to function before, during and after the
year 2000 with no modifications required.
The COM satellite shall perform an automatic self-configuring
diagnostic test procedure whenever power is initially applied
to it or upon reapplying power after a power interruption.
The COM satellite, when used in conjunction with a host controller,
shall be capable of being removed from control by the central
unit, thus allowing the host controller to be operated in
a stand-alone mode.
The COM satellite shall have a three (3) position MODE switch
on the central processing PC board. The positions shall be
of "TIMED," "CENTRAL" and "LOCAL."
The "CENTRAL" position of this switch shall place
the COM satellite under the control of the Rain Bird central.
The "LOCAL" position switches the valve common wire,
coming from the solenoids, back to the host controller and
disconnects it from the COM satellite. Thus it enables the
host controller to operate manually or, if applicable, from
its own locally stored backup program. By moving the switch
to the "TIMED" position and holding it in place
for at least three (3) seconds, the COM satellite will be
placed in the "LOCAL" mode for a period of two (2)
hours. During this period it is possible to operate the host
controller in a stand-alone mode. At the end of this period,
the COM satellite shall automatically go back under Rain Bird
central control. The stand-alone mode shall be cancelled before
the end of the time period whenever a central control station
request is received.
The central processing PC board shall have three (3) LED
indicating lights to display current satellite status and
provide performance verification. The motherboard of the COM
satellite shall also have LED indicating lights to provide
further satellite status and performance verification. An
LED indicating light on the output PC board shall indicate,
when lighted, that the fuse on the board has blown.
The satellites, whether designated as COM two-wire or Link
models, shall have a sturdy, heavy duty, highly impact resistant,
molded plastic cabinet suitable for wall or surface mounting
onto a host controller or for mounting onto a pedestal. The
cabinet shall be weather, temperature and chemical resistant.
The cabinet shall be 12.25" wide and 9.62" high
by 6.75" deep. The enclosure shall have mounting holes
in the back for wall or surface mounting and a 2" diameter
opening in the bottom for mounting onto a 2" diameter
pipe pedestal. The front cover shall have a key operated lock.
All PC boards shall be easily removable from the front of
the cabinet.
The satellite, where designated as COM two-wire PP or COM
Link PP, shall be housed in a sturdy, heavy duty, ABS molded,
high-impact resistant plastic pedestal enclosure. The pedestal
enclosure shall be 30" tall and 12.25" wide by 12.06"
deep, and temperature and chemical resistant. The enclosure
shall be complete with a mounting template and hardware for
bolting to a poured concrete base. The top cover shall have
a heavy molded rubber gasket and a key operated lock. The
plastic pedestal enclosure shall have front and back removable
panels for access to both pedestal compartments for ease of
installation.
The COM PP models shall come with one 24-station terminal
board supporting stations #1-24 and installed on the rear
side of the pedestal dividing panel to facilitate field wire
installation. If required, a second 24-station terminal board
(P/N H60325) can also be added to support stations #25-48.
All COM satellites shall be UL or C-UL listed, as applicable.
The COM satellite shall require 117 VAC (100 VAC minimum
to 129VAC maximum) at 60 Hz input power or 220/240 VAC (200
VAC minimum to 260 VAC maximum) at 50/60 Hz input power. Each
satellite shall have a step-down, triple secondary output
transformer for 117 VAC input power to 26.5 VAC output power,
or 220/240 VAC input power to 26.5 VAC output power, for the
operation of solenoid remote control valves and/or valve-in-head
sprinklers. The transformer shall be rated at 3.0 AMP output
capacity for operating a maximum of eight (8) Rain Bird standard
2-watt solenoids plus a master valve at one time (limited
by a 3.0 AMP fuses on the station output PC board and on the
mother board). A second output shall provide 12.0 VAC with
a 2.0 AMP capacity and a third output shall provide 7.6 VAC
with a 2.0 AMP capacity.
The 117 VAC/60Hz current requirement for the COM satellite
shall be 0.10 AMP maximum plus 0.07 AMP for each Rain Bird
2-watt solenoid that is operating at one time. Other manufacture
type solenoids may require more current than the Rain Bird
solenoid and therefore may require greater total current and/or
a reduction in the number of solenoids than can be operated
at one time.
All COM satellites shall be grounded to a 10 OHM or less
3-rod grounding grid. The satellite shall use relays and MOV
surge arrestors to electrically isolate the circuitry from
field noise, while providing a physical gap to protect against
surge damage from coming in on the field wiring.
Under Rain Bird central control operation, all station timing
for the COM satellite shall be done from the central and NOT
according to times that are programmed for each of the stations
on the host controller. The programming on the host controller
shall be functional only if the communication link between
the satellite and the Rain Bird central is lost. The changeover
to the "STAND-BY" program and/or back to central
control shall take place automatically. The COM satellite
unit, when operated under central control, shall be capable
of random access operation of individual stations. Any of
the stations shall be capable of repeating anytime within
the scheduled cycle of operation, as often as desired and
for a different amount of time on each repeat. It also shall
be possible to place any individual station of a satellite
in as many different scheduled cycles as may be desired. There
will be no limits or restrictions as to the number of individual
scheduled cycles for a given satellite station.
TWO-WIRE COMMUNICATION: If so specified, a two-wire communication
path shall be used for communicating from the Rain Bird central
equipment to the COM two-wire satellites, and from the satellites
back to the central. This two-wire path shall also be used
to communicate a feedback signal back to the central equipment.
This feedback signal shall be used by the Rain Bird central
to verify and log all satellite activity.
LINK COMMUNICATION: If so specified, a 2-watt radio shall
be used to provide two-way communication from the Rain Bird
central equipment to the COM Link satellites, and from the
satellites back to the central. This 2-watt radio shall also
be used to communicate a feedback signal back to the central.
This feedback signal shall be used by the Rain Bird central
to verify and log all satellite activity.
All COM satellite, low-voltage station output wiring shall
be type UF single conductor annealed soft copper wire with
a .06" thick PVC insulation jacket. Wires are of the
sizes indicated on the drawings and of the colors indicated
or directed. All splices, in both the two-wire communication
and station output wiring, and all underground connections
shall be made using either 3M, DBY or DBR (direct burial)
splice kits or 3500 Scotch-Lok connector packs. All underground
wire joints and connections shall be in standard size rectangular
valve boxes, except at solenoids and terminal strip connections.
When a COM satellite is used to convert a host controller,
the COM station outputs shall be wired to the station outputs
of the host controller using a Rain Bird COM-STN 1-24 cable
assembly, (P/N 632540) for stations #1 through #24. If more
than 24 stations are involved, a Rain Bird COM-STN 25-48 cable
assembly, (P/N 632541) shall be used for stations #25 up to
#48.
The model, location and number of COM satellites shall be
as shown on the drawings or as instructed and shall be as
manufactured and furnished by Rain Bird Sprinkler Mfg. Corp.,
Glendora, California, U.S.A.
