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File name CPX400A Service Manual.pdf

CPX400A Bench Power Supply Service Manual Book Part Number 48511-0910 - Issue 1 Table of Contents Specification Safety EMC Installation Connections General Circuit Descriptions Calibration Parts List Component Layouts Circuit Diagrams 2 4 5 6 6 7 8 13 15 26 29 1 Specification General specifications apply for the temperature range 5°C to 40°C. Accuracy specifications apply for the temperature range 18°C to 28°C after 1 hour warm-up with no load and calibration at 23°C. Typical specifications are determined by design and are not guaranteed. OUTPUT SPECIFICATIONS Voltage Range: Current Range: Power Range: Output Voltage Setting: Output Current Setting: Operating Mode: 0V to 60V 0A to 20A Up to 420W By coarse and fine controls. By single logarithmic control. Constant voltage or constant current with automatic cross-over provided that the power demanded stays within the power envelope, see graph. Outside of this envelope the output becomes unregulated. CPX 400A POWER ENVELOPE Output Switch: Output Terminals: Sensing: Output Protection: Electronic. Preset voltage and current displayed when off. 4mm terminals on 19mm (0·75") pitch. 30A max. Switchable between local and remote. Spring-loaded push terminals for remote connection. Forward protection by Over-Voltage Protection (OVP) trip; maximum voltage that should be applied to the terminals is 70V. Reverse protection by diode clamp for reverse currents up to 3A. The output will be tripped off if a fault causes the internal temperature to rise excessively. 10% to 110% of maximum output voltage set by front panel screwdriver adjustment. Change in output for a 10% line change: Constant voltage: <0.01% of maximum output Constant current: <0.01% of maximum output Change in output for any load change within PowerFlex envelope, remote sense connected: Constant voltage: <0.01% of maximum output Constant current: <0.05% of maximum output 4mVrms max; typically <2mVrms, <10mV pk-pk, at maximum load, CV mode. Over-temperature Protection: OVP Range: Line Regulation: Load Regulation: Ripple & Noise (20MHz bandwidth): 2 Transient Load Response: Temperature Coefficient: Status Indication: <250us to within 50mV of set level for a 5% to 95% load change. Typically <100ppm/°C Output on lamp. Constant voltage mode lamp. Constant current mode lamp. Unregulated (power limit) lamp Trip message on display. METER SPECIFICATIONS Meter Types: Meter Resolutions: Meter Accuracies: Dual 4 digit meters with 12.5mm (0.5") LEDs. Reading rate 4 Hz. 10mV, 10mA Voltage 0.1% of reading ± 2 digits, Current 0.3% of reading ± 2 digits GENERAL AC Input: Power Consumption: Operating Range: Storage Range: Environmental: Safety: EMC: Size: Weight: 110V ­ 240V AC ± 10%, 50/60Hz. Installation Category II. 1250VA max. +5єC to +40єC, 20% to 80% RH. -40єC to + 70єC. Indoor use at altitudes up to 2000m, Pollution Degree 2. Complies with EN61010-1. Complies with EN61326. 210 x 130 x 375mm (WxHxD) half rack width x 3U height (optional ra