Detcon 1010A-FB - Manual (Page 2)

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1.1 DESCRIPTION
switch, an alarm disable switch and a line power fuse.
Discreet output terminal strips located on the
controller mother board are provided for sensor
terminations, Form C dry contact alarm outputs, 4-
20ma outputs for remote recording devices, AC power
in, DC power in, remote reset as well as relay logic
and power terminations for the multiple alarm relay
circuit. Form C relay outputs may be discreet, zoned
or common by gold plated jumper tabs located on the
controller mother board. Form C dry contacts;
common, normally open and normally closed, are
provided for 3 alarms; High, Low and Fault. Contacts
are rated at .6 amp @125 VAC / 2 amp @ 30 VDC.
When used in conjunction with the multiple alarm
relay circuit (part #5026), contacts are rated 8 amp
@ 117 VAC / 5 amp @ 30 VDC. Detcon Model 1010A-FB control enclosure is a
NEMA 4X molded fiberglass case with hinged,
gasketed door and is designed for surface mounting
in both indoor and outdoor locations. An unbreakable
glass view window is gasket mounted in the door.
The NEMA 4X rating is by definition raintight and
therefore suitable for outdoor location in electrically
non-hazardous environments.
The control enclosure houses the mainframe
hardware compatible with Detcon Model Series 10A
digital electronic controls. Model 1010A-FB system
capacity is up to 10 channels consisting of remote
mounted area sensors and single channel electronic
controls (Detcon Model 10A). The system is powered
by AC line power and/or 24 VDC unless otherwise
specified at time of order.
The control enclosure includes, as standard
operating controls (DWG #580.27A); a power on/off
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1.2 MUTIPLE ALARM RELAY CIRCUIT
A multiple alarm relay circuit (DWG #377.01A)
mounted on the controller mother board is provided
with each Detcon Model 1010A-FB. Mounting
provisions for an additional alarm circuit are also
provided. The alarm circuit consists of 4 interposing
relays (contacts are rated 8 amp @ 117 VAC / 5 amp
@ 30 VDC) with 24VDC coils as standard. Other coil
voltage ratings must be specified at time of order.
The alarm circuit can be configured to ouput Form
C dry contacts (common, normally open and
normally closed), AC power or DC power. A 5 amp
microfuse is provided for each relay and is configured
in series with the common pole of its respective relay.
This configuration is functional regardless of whether
Form C dry contacts, AC power or DC power outputs
are used.
An In/Out termination is provided for applying AC
or DC power into any one of the interposing relays.
A gold plated jumper tab is used to apply the in/out
power option to its corresponding relay, thus the 4
relays may be used in a combination of Form C dry
contacts and VDC outputs or Form C contacts and
VAC outputs.
The terminations labled "Alarm Coil Power" located
to the left of the alarm circuit are used only for coil power. The "+" termination may be used to
provide for various relay logic through the Form C dry
contacts of each individual Model 10A channel located
on the controller mother board directly above the
alarm circuit card. The "-" termination should be wired
into the common termination (shown by a common
symbol) located on the left of the alarm circuit board.
The terminations labled "Alarm Power" located to
the far left of the unit are used for providing power to
the In/Out termination on the alarm circuit card. As
can be seen in the 1010A-FB schematic / wiring
diagram (DWG #569.01A), the alarm power
terminations for AC come directly from the AC input
terminals located above on the controller mother
board. The same is true of the DC power terminations.
Note: DC power used to drive alarms must be
obtained through a remote DC power source. The
remote DC power source should be terminated to the
terminals labled "DC IN" located on the controller
mother board. The "DC IN" terminations function as
both an alternative DC source used to power the
1010A-FB as well as provide power for DC alarms.
The 1010A-FB power supply is not capable of
providing power for alarm devices.
Detcon Model 1010A-FB Gas Detection System PG.2
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1.3 ALARM DISABLE
The alarm disable switch, located on the front
panel, operates by removing DC common from the
"Alarm Coil Power" terminals. Disabling of alarms does not inhibit any function of the Model 10A
digital control module. The digital display, alarm
LED's and on board alarm relays remain active.