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Technical Specification
2
The Noby-21 Relay Module is designed
for use in both 12v and 24v alarm
systems. The DPDT voltage-free contacts
permit switching of two independant
circuits. Bridging the two contact sets
together creates an effective single
contact with a switching capacity of up to 4
amps. An on-board LED displays the
activation state of the relay. Two adhesive
mounting pillars are supplied with the
Noby-21.
Typical applications include:
• switching high currents directly from
the battery (via an in-line fuse).
• signal isolation between various
parts of a system operating at
different voltage supplies.
Figure 1 illustrates a 2-wire connection which is suitable for most outputs capable of delivering in excess of 20mA.
Note that a link must be connected between the +’ve Vs terminal and the signal input as shown. The arrangement
shown in Figure 2 is applicable where only a weak signal output is available from by the alarm equipment. In this
case the Noby-21 is powered from an auxillary supply voltage, with the relay now being driven by the signal line.
Absolute Maximum Supply Voltage 30 VDC
Supply Voltage Range 10 - 30 VDC
Operating Current: Vs = 12v
Vs = 24v
Standby Current 0 mA
Relay Type DPDT
Contact Power Rating 60 VA
Contact Current Rating @28VDC 2.0 A
Maximum Contact Current 2.0 A
Isolation Voltage: coil to contacts
contacts to contacts
Insulation Resistance: coil to contacts
contacts to contacts
Signal Input Resistance 4.7 kohm
Signal Input Operating Threshold > 4.0 V
Operating Status LED Yes
Coil Suppressor Diode fitted Yes
PCB Dimensions 55 x 30 mm
Value Unit
15
18
1000 VAC
> 1000 Mohm
mA
21
NO NO
NC NC
Alarm Output
from 12v
OR
24v equipment
Signal Output
from 12v
OR
24v equipment
Link
Vs Vs
0v 0v
0v
THIS DEVICE IS NOT INTENDED FOR SWITCHING 230VAC OR OTHER DANGEROUS
VOLTAGES, AND ANY ATTEMPT TO DO SO MAY CREATE AN ELECTRICAL SHOCK HAZARD.
1F Mill Fold
Elland Road
Ripponden
HALIFAX
West Yorkshire
HX6 4DJ
21
NO NO
NC NC
Vs=12v 24v
Aux. Supply
Vs
www.noby.co.uk
sales@noby.co.uk
Tel: +44(0)1422 823395
F
x: +44
OR
1422 82
1
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