Detcon 1212-N4X - Manual (Page 3)

1.2 S PECIFICATIONS
Electrical Classification
NEMA 4X
Dimensions
20.25''W x 20.19''H x 10.25''D
Capacity
12 single channels
Power Input
85-264 VAC/24VDC
Power Consumption
5 watts per channel (full alarm peak load)
Outputs
Discrete Analog 4-20 mA DC
Discrete or zoned (up to two) Serial RS-485 Modbus™
Discrete or zoned alarm relays
Contacts include common with jumper selectable choice (on controller) of normally-open or normally-closed for four alarms
Resistive load: 5A, 250 VAC; 5A, 30 VDC
Inductive load: 2A, 250 VAC; 2A, 30 VDC
Max. operating current: 5A
Operating Temperature Range
-40°F to +175°F
Warranty
One year
1.3 M
ULTIPLE
A
LARM
R
ELAY
C
IRCUIT
A multiple alarm relay circuit (referred to in further text as MARC) mounted on the controller mother board is
provided with each Detcon Model 1212-N4X. The MARC (f igure 1) consists of 4 interposing relays (contacts are
rated 10 amp @ 120 VAC/8 amp @ 30 VDC) with 24VDC coils as standard. Other coil voltage ratings must be
specif ied at time of order. The MARC can be conf igured 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 conf igured in
series with the common pole of its respective relay. This conf iguration 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 DC outputs or Form C contacts and AC outputs.
The terminations labeled “Alarm Coil Power” located on the left of the 1212-N4X motherboard are used only for
coil power. The “+” termination may be used to provide for various relay logic through the Form C dry contacts
terminals of each individual Model 12B channel located on the 1212-N4X motherboard. The “–” termination
should be wired into the common terminal (shown by a common symbol) located on the left of the MARC.
The terminations labeled “Alarm Power” located on the left of the 1212-N4X motherboard are used for providing
power to the In/Out termination on the MARC. As can be seen in the 1212-N4X schematic/wiring diagram (f igure
2), the alarm power terminations for AC come directly from the AC input terminals located above on the 1212-
N4X motherboard. 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 labeled “DC IN” located on the 1212-N4X motherboard. The
“DC IN” terminations function as both an alternative DC source used to power the 1212-N4X as well as provide
power for DC alarms. The 1212-N4X power supply is not capable of providing power for alarm devices.
Mounting hardware is pre-installed on the 1212-N4X motherboard for an additional multiple alarm relay circuit. See
section 1.9 for part number and ordering information.
Model 1212-N4X NEMA 4 Control Enclosure PG.3