Noby UK Power Supplies


	Overview


	Specification

Noby UK manufacture a range of power supplies to meet a variety of needs.

Variants offered are 12 Volts DC at 1 Amp, 12 Volts DC at 3 Amp, 24 Volts DC at 1 Amp and 24 Volts DC at 3 Amps.

All PSUs are available either unmonitored or monitored (with the suffix M).

All power supplies are housed in an attractive metal cabinet with a capacity for one or two 12 Volt 7 A/hr SLA batteries

Power Supply Unit	Noby-121	Noby-123	Noby-241	Noby-243
Mains Supply Voltage	230 +10% -6%	230 +10% -6%	230 +10% -6%	230 +10% -6%
Mains Supply Frequency	50 / 60	50 / 60	50 / 60	50 / 60
Mains Power Rating	40	60	40	80
Nominal Battery Voltage	12	12	24	24
Regulated PSU charger voltage	13.6	13.6	27.3	27.3
Regulated PSU charger current 20 minute rating continuous	1.5 1.0	3.0 2.5	1.5 1.0	3.0 2.5
Fused Outputs: F1 Transformer Secondary F2 Battery Positive F3 Auxiliary Outputs	T2A T3A F1A	3.0 3.0 2.0	2.0 3.0 1.0	3.0 3.0 2.0

Cabinet (1.2mm powder coated steel)	Noby-121	Noby-123	Noby-241	Noby-243
Dimensions (width x height x depth) in millimetres:	220x210x75	220x210x75	335x325x75	335x325x75
Shipping Weight in kg:	3.0	3.0	4.2	4.2

PSU Monitoring (M versions only)	*Value*	*Unit*	*Comments*
Low Voltage Detection: Noby-12x Low Voltage Detection: Noby-24x:	11.0 21.0	volts volts	continuously monitored continuously monitored
Battery Presence / Fuse F2 Monitor	Yes	Hz	sampled every 60 seconds
Battery Capacity Monitor	Yes	VA	10 second load test every 12 hours Performed 12 hours after mains restored and every 12 hours thereafter
Aux Output Fuse F3 Monitor	Yes	volts	continuously monitored

Signal Inputs and Outputs (M versions only)	*Value*	*Unit*	*Comments*
Fault Input: Input resistance (to 0V) Threshold Voltage	50 8	kohm volts	active when 12/24 volt applied
Fault Output: Output series resistance	470	ohm	npn open-collector (pull-up resistor to 12/24V) normally high, active low real time fault status (note 1)

LED Indications (M versions only)	*LED Status*	*Fault Identification*
Green Power LED	off steady on slow flash	Mains absent Mains OK Mains restored with standing PSU fault (note 2)
Yellow Fault LED	off steady on slow flash 1 flash / 2s 2 flashes / 4s 4 flashes / 4s	PSU OK – no faults Low voltage Fault Input activated from ancillary equipment Aux output fuse blown Battery not present or battery fuse blown Battery capacity test failed

Battery Presence & Capacity tests are sampled periodically (60s & 12 hours respectively), and the fault output will be effectively latched until the next sample (or longer if the fault persists).
A flashing green Power LED signifies that the corresponding PSU fault probably occurred as a direct result of temporary mains loss. In some circumstances this condition could take a minimum of 12 hours to clear.
On restoration of mains power, the 12 hour Battery Capacity timer is reset (to reduce false reporting due to temporary mains losses).
Mains absence is not signalled on the fault output, although a low voltage fault condition will be eventually signalled for prolonged loss of mains.


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