7.1
13
95-8242
CONTROLLER
The controller is furnished with a field wiring connector that
incorporates pressure type screw terminals for attaching
wires and two circuit board edge connectors for plugging
in the controller.
The controller must be located in a non-hazardous area.
The use of a mounting cage is recommended for mounting
the controller. The cage is designed to hold the field wiring
connectors for ease in making electrical connections and
installing, servicing, or replacing the modules. The Q4004
Mounting Cage is designed to hold up to 8 modules in a 19
inch instrument rack (See Figure 5). This mounting cage
can also house voltage converters or other equipment
that is used in conjunction with the R7404 as part of the
total detection system. Cages that hold fewer modules
are also available. Optional filler panels (part number
002188-001) are available for covering unused sections
of the mounting cage.
NOTE
The R7404 Controller contains several semiconductor
devices that are susceptible to damage by
electrostatic discharge. An electrostatic charge
can build up on the skin and discharge when an
object is touched. Therefore, the controller should
be handled carefully, taking care not to touch the
terminals or electronic components. For more
information on proper handling of the controller,
refer to the Service Memo (form 75-1005)
Switch Setting Procedure
It is essential that the controller be properly
programmed before applying power to the system
.
There are four rocker switch assemblies on the left side of
the controller. Each switch assembly has eight rockers,
which are opened or closed to select zone and detector
combinations, controller sensitivity, fire logic, output
latching, and time delay. Figure 13 illustrates the left side
of the R7404 and contains a short explanation of rocker
switch usage.
SWITCH 3
FIRE LOGIC SETTING
OP = OPEN, CL = CLOSED, DC = DON'T CARE
A•B = A AND B
SENSITIVITY SELECTION
ROCKER 3-4 CLOSED = 64 CPS
ROCKER 3-3 CLOSED = 32 CPS
ROCKER 3-2 CLOSED = 16 CPS
ROCKER 3-1 CLOSED = 8 CPS
(ALL ROCKERS OPEN
OR ROCKER 3-1 CLOSED = 8 CPS)
THESE ROCKERS MAY BE USED
IN ANY COMBINATION FOR 8 CPS TO 120 CPS
3-8
CL
CL
CL
CL
OP
OP
OP
OP
3-7
DC
DC
DC
DC
3-6
DC
DC
OP
CL
ALL OPEN
1 CLOSED
2 CLOSED
3 CLOSED
3-5
OP
CL
DC
DC
A (1 OF ZONES 1 TO 4)
A (2 OF ZONES 1 TO 4)
B (1 OF ZONES 5 TO 8)
B (2 OF ZONES 5 TO 8)
A•B (1 OF 8 ZONES)
A•B (2 OF 8 ZONES)
A•B (3 OF 8 ZONES)
A•B (4 OF 8 ZONES)
FIRE LOGIC OUTPUTS
ROCKER POSITION
A0274
SWITCH ROCKER NUMBERS ARE DESIGNATED 1-1, 1-2, 1-3, ETC.
THE NUMBER PRECEDING THE DASH INDICATES THE SWITCH NUMBER.
THE NUMBER FOLLOWING THE DASH INDICATES THE ROCKER NUMBER
OF THE SWITCH INDICATED.
NOTE:
8
7
6
OPEN
8
7
6
OPEN
DOT INDICATES ROCKER DEPRESSED
ROCKER POSITIONS
CLOSED
OPEN
DETECTOR SELECTION SWITCHES 1 AND 2
THESE TWO SWITCHES PROGRAM THE MICROPROCESSOR
FOR EACH DETECTOR CONNECTED
SWITCH 1
PLACE ROCKER IN OPEN POSITION
FOR EACH DETECTOR IDENTIFIED AS NO. 1
IN ZONES 1 THROUGH 8
SWITCH 2
PLACE ROCKER IN OPEN POSITION
FOR EACH DETECTOR IDENTIFIED AS NO. 2
IN ZONES 1 THROUGH 8
}
}
SWITCH 4
TIME DELAY
AND LATCHING/NON-LATCHING OUTPUTS
ROCKER 8 – NOT USED
ROCKER 7 – NOT USED
ROCKER 6 – 8 SECOND DELAY
ROCKER 5 – 4 SECOND DELAY
ROCKER 4 – 2 SECOND DELAY
ROCKER 3 – 1 SECOND DELAY
ROCKER 2 – .5 SECOND DELAY
(ALL SWITCHES OPEN, TIME DELAY = 0)
ROCKER 1 – LATCHING OUTPUTS
WHEN ROCKER IS OPEN
Figure 13—Rocker Switches