Detcon 1610A-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 1610A-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 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 1610A-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 #886.27A); 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 1610A-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
output 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 1610A-FB schematic / wiring
diagram (DWG #888.01A), 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 1610A-FB as well as
provide power for DC alarms. The 1610A-FB power
supply is not capable of providing power for alarm
devices.
Detcon Model 1610A-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.