Welcome to Noby UK
Power Supplies
ISO9001:2008 Approved by Afnor UK

Power Supplies

    Features

  • 1.0A or 3.0A continuous.
  • 12 Volts DC or 24 Volts DC
  • battery monitoring to EN54 part 4
  • fault signal input & output
  • attractive steel cabinet
  • reliable build quality
Power SupplyCabinet (Click to enlarge)
Noby-241M (Click to enlarge)
Noby-123 (Click to enlarge)

Overview

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).

Unmonitored

Model No.

Rating

Noby-121

12V / 1A

Noby-123

12V / 3A

Noby-241

24V / 1A

Noby-243

24V / 3A

Monitored

Model No.

Rating

Noby-121M

12V / 1A

Noby-123M

12V / 3A

Noby-241M

24V / 1A

Noby-243M

24V / 3A

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

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Technical Specifications

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

Notes for Monitored PSUs

  • 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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