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A2551

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8 Channel 8 V/12 A Full Floating Channel Board

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Features

  • 8 independently controllable Low Voltage channels
  • 0÷8 V output voltage and 12 A maximum current (60 W)
  • Individual Floating Channels
  • DB37 or 8 pin D-Sub connectors
  • Individual remote sense lines (A2551A only)
  • Low ripple
  • Under/over-voltage alert, overcurrent and max. voltage protection
  • Interlock logic for unit enable
  • Software Tool for easy channel management
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Overview

The power supply A2551 is a single width board (5 TE wide) that houses 8 independent Low Voltage Individual Full Floating channels, compatible with the CAEN Universal Multichannel Power Supply System (SY4527, SY5527). The A2551 is available in different versions equipped with D-Sub 8-pin or with DB37 connector:

blank DB37 connector

Single width (5 TE wide), 8 channels for Mod. A2551A

 blank D-Sub 8W8 – 8 pin high current connector

Single width (5 TE wide), 8 channels for Mod. A2551

Consult our connectors reference page for technical information.

A2551 Individual Floating channels allow on-detector grounding, reducing the noise level. The floating channels are insulated from each other up to ±500 V. Each output channel is provided with individual remote sensing lines to compensate for the voltage drop over the connection cables.

The output voltage range is 0 ÷ 8 V, with 0.2 mV monitor resolution (connector and sense voltages). The maximum output current is 12 A with 500 μA monitor resolution. The Maximum channel power is 60 W. The Output Voltage RAMP UP and RAMP DOWN Times may be selected independently for each channel in 1 ÷ 500 V/s range (1 V/s step).

Optionally, the A2551 can be ordered with the capability to connect the channels in parallel in pairs (CH0-CH1, CH2-CH3, CH4-CH5, CH6-CH7).
When two channels are paralleled, the system automatically detects the configuration, and the control software treats them as a single channel with an increased maximum output current of 20 A and a total power of 100 W.
Boards produced without this option can be retrofitted.

Safety features allows the module to perform as a current generator and includes:

Overvoltage detection if a channel voltage exceeds the programmed Overvoltage threshold value (OVVThr), it is signaled to be in “overvoltage” and is switched off.
Undervoltage detection if a channel voltage decreases below the programmed undervoltage threshold (UNVThr), it is signaled to be in “undervoltage” and is switched off.
Overcurrent detection if a channel tries to draw a current larger than its programmed limit, it is signalled to be in “overcurrent”; when overcurrent is detected, the relevant channel can be programmed either to turn off after a programmable trip time or to keep on providing the maximum allowed current: this feature allows the module to work as current generator.
A global enable/disable connector allows to disable the channels and it is also possible, via front panel logic signals, to enable individually each channel (A2551A only).

Technical Specifications

Packaging

1 unit (5 TE) wide; 6U – High mechanics

No. of Channels

8

Polarity

Individual Floating (±500V isolation)

Output Voltage

0 ÷ 8V

Max Output Current

12A

Max Output Power (connector output)

60W

Vset Resolution

0.2 mV

Iset Resolution

0.5 mA

Vmon Resolution

0.2 mV

Imon Resolution

0.5 mA

Ramp Up/Down

1-500V/s (1 V/s step)

Voltage Ripple (10Hz ÷ 20MHz)
  • Typ: <3 mVpp
  • Max: <5 mVpp
Accuracy
  • Vout/Vmon: ± 0.1% ± 20 mV
  • Vset/Vout: ± 0.1% ± 20 mV
  • Iout/Imon: ± 1% ± 50 mA
  • Iset/Iout: ± 1% ± 100 mA
Hardware OVV Protection

10.5 V typ

Trip

0 to 999.9s; 1000s = Infinite; step 0.1s

Stability

<5mV (Vset = 5V – No Load – one day after 1 hour warm up)

Long Term Stability

<10mV (Vset = 5V – No Load – one week after 1 hour warm up)

Temperature Coefficient

±100ppm/°C

Load regulation

< 0.05% (Vset = 5V, Iout from 0A to 10A, 1m AWG20 cable / 1m AWG20 sense wire)

Operating temperature

0 ÷ 45°C

Storage temperature

-10 ÷ 70°C

Humidity

0 – 80% non condensing

Altitude

≤ 2000m

Safety Standard – ROHS – Halogen free

ROHS

MTBF

Base: 120000 hours

ECM qualification

CE Standards

Compare

Compare with Floating Low Voltage Power Supplies.

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Ordering Options

Code Description
WA2551AXAAAA A2551A - individual floating 8 ch 8 V/12 A (60 W) board - DB37 conn.   RoHS
WA2551XAAAAA A2551 - individual floating 8 ch 8 V/12 A (60 W) board   RoHS
WPERSXXA2551 A2551 parallel channel customization   RoHS

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