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The CERN spec./CE NIM crate series represents modular designed NIM crates with linear regulated power supplies in excellent and proven W-IE-NE-R quality, conforming to EUR4100 and CERN specifications. These NIM crates are outfitted with 300W linear regulated, low noise plug-in power supplies for standard applications.

The modular concept of the CERN NIM and CAMAC standard allows to easily insert / remove and exchange fan trays (if outfitted with) and power supplies. All CERN spec. parts as bins, fan trays and power supplies are interchangeable between different NIM and even CAMAC crates.

All power supplies support the features defined by the CERN standard including the monitoring connector and provide protection against short circuit, over / under voltage and over temperature.

The “CE“ versions provide improved AC wiring.



  • 5U high bin UEN 03 without fan tray space
  • CERN compatible bin mechanics and wiring, extreme solid / heavy construction, prepared for rear-side plug-in power supply
  • 12 wired NIM connectors with long life – high quality massive, gold plated contacts
  • 1/2 NIM width control panel with mains switch, control LED’s and LED’s / test pins for all outputs
  • CE conform versions provide improved AC wiring between power supply and bin.
  • Dimensions: 19” (483mm)  x 5U (222.3mm) x 530mm [whd], weight: ca. 5 – 6 Kg

UEP/CEP 22M NIM 300W Power Supplies

  • CERN spec. high precision linear regulated NIM power supplies for 300W power output, all 6 DC voltages +/-6V, +/-12V +/-24V provided, lowest noise (<3mVpp) technology, special version with increased +/-12V current available (no +/-6V)
  • Power supplies to be plugged-in to the rear of the NIM bin for easy exchange
  • Protected against short circuit, over / under voltage and over temperature
  • Equipped with status control and CERN-spec. monitoring output (PG28)
  • 100V, 110V, 220V or 240V 50Hz/60Hz  AC input (to be selected / changeable)
  • CE conform versions provide improved AC wiring.
  • Dimensions:   429mm x 131mm x 215mm [whd], weight:  16.5kg

Ordering Information

Standard configurations (others possible by request).

NIM300CE_x5U-CEP 22M17A/17A3.4A / 3.4A3.4A / 3.4A0.5A300W
NIM300_x5U-UEP 22M17A/17A3.4A / 3.4A3.4A / 3.4A0.5A300W

Note: _x = defines the AC input voltage, factory default is 220V AC (without index)
x = B: 110V AC
x = J: 100V AC
x = E: 240V AC

(* usable slots)

Technical Information


Non-ventilated 525mm deep 5U NIM bin with 12 slots. Rugged heavy-duty construction with 6mm side panels depth 525mm. Power supply is plugged in and locked from rear side. The power-bus-system is equipped with 12 high-quality long-life NIM connectors parallel wired. Connector pins made of massive brass, gold plated.

Current rail system for +/-6V and Ground. Spliced wiring and additional power-connector pins have been used to allow currents of 25A for +/-12V lines now. CERN specifications are fulfilled entirely. The wiring across the NIM connectors is achieved under a screening cover.

When used according to CERN specifications the bin wiring carries mains voltage. All this mains cable are arranged as screened lines to prevent effects of mains distortions to secondary circuits. Due to not fulfilling the restrictions of EN 60950, UL 1950, etc., power supply and fan tray are not CE-marked. When used in combination with CE conform power supplies (CEP) and fan tray (CEL) mains voltage will be conducted through a separated power cord to the fan tray. This power cord is fixed at fan tray side and has to be plugged to the power supply. The CEN 03 bin is free of mains voltage then.

Control panel with mains switch, mains lamp (yellow/red), LED's for status (green), overheat (yellow), overload (red), Alarm output (LEMO 00, open collector), test sockets and monitor LED's for all DC-Voltages according to CERN specifications.

Current maximum ratings:

Voltage Line Current / slot Current / bin Comment
+/-6V 13A 65A sensed
+/-12V 13A 13A (optional 26A) sensed
+/-24V 13A 13A sensed
GND 13    
115V AC   0.5A Secondary

All NIM bins have clean earth wired with 0,25mm²

NIM / CAMAC Power Supply UEP 22M

Linear regulated low noise power supply with 300W DC output, cut-off-protection for "overload", "over voltage", and "over temperature"-failures. Outfitted with same monitoring and control facilities as UEP 10M88, the UEP 22M can be used to power NIM- or CAMAC-Crates. After cut off, caused by invalid operation, reset of »M« power supplies is possible by toggling the mains switch off and on again or feeding a 24VDC signal to the "rearming" input at the monitor connector. Standard mains voltage range is 230 / 115VAC, selectable internally.

UEP 22M is foreseen for convection cooling at full output performance. Forced air-cooling can increase the total power availability up to 400W.


Power supply DC-Outputs: max. power regulation application
UEP22M 300W linear NIM /CAMAC
UEP22MS 300W linear NIM
  +6V -6V +12V -12V +24 -24V 115VAC
UEP22M 17A 17A 3.4A 3.4A 3.4A 3.4A 0.5A
UEP22MS - - 15A 15A 1A 1A 0.5A


Input voltage, 47-63Hz 100V, 115V or 230V (+10% / -15%)
Soft start yes
Output: Noise and Ripple: Full load / 80% rated output <3mVpp / 1mVpp,  <0,6mVRMS
Regulation static: Change of output voltage versus load change 10-100% <0,05%
Regulation static: change of output voltage versus line change  +/-10% <0,02%
Recovery time versus load change 10-100% <0,15ms
Output impedance:  Static / Dynamic(at 100kHz) 0,2mOhm / 0,5 Ohm
Temperature Error <0,005%/K
Thermal Protection (No. of thermal switches) (3x)
Output Current Characteristics (Ishort <3A in foldback regulators), reverse bias diodes! Foldback and trip off
Dual tracking for complementary outputs yes
Calibration ranges Voltage / Currents +/-5% / 20%
Sense compensation  ranges, all DC voltages  0,5V
Status Control for all voltages (Over- Under-Voltage Comparator, defaults +/-0,3%) bad/good, Status LED-signal
Overvoltage Protection, trip off thresholds (defaults) Crow bars  7,3V, 14,5V, 24,5V
Derating >40°C with 2% up to 60°C max.

Optional CAN-bus interface for DC voltage monitoring and remote on/off via rear 9 pin sub D connector