Gamry Instruments Interface 1000, Operator'S Manual

Page: 50 / 88

Chapter 6: Instrument Circuitry--Interface 1000 Schematic/Block Diagrams
6 - 6
Figure 6-5
Power Conversion
Notes for Figure 6-5:

Note the ground isolation between the input power and the Interface 1000 circuitry. The Interface 1000
chassis is connected to the Floating Instrument Ground.
Transformers and digital isolators are the only components connected between the grounds.

The 600 kHz power supply sync signal is derived from the same clock used to control data acquisition.
Data points taken at an integer multiple of 1.6666 µs/point will be synchronized with the power supply,
minimizing the effect of power supply noise on the data.

The DC-DC Converter powers both the floating circuitry and some earth-side circuitry including the USB
processor and User I/O.

Additional circuitry protects the Interface 1000 against ESD and electrical surges.

Like most complex electronic apparatus, the Interface 1000 uses a variety of power supply voltages.

The incoming DC voltage must be between 46 and 50 V. With inputs below 46 V, the PWM may be
unable to regulate the supply. Above 50 V, the PWM may not start-up.
Caution: Do not use a DC power source other than the AC adapter provided with your
Interface 1000 or a Gamry-supplied alternative. Other power sources may void the performance and/or
safety characteristics of the Interface 1000.
Power input voltages less than 40 V or greater than 52 V can damage the Interface 1000’s power supply.