System Hardware Overview; Main Board; Relay Board; Power Supply - Neutronics 7100E Instruction Manual

Model 7100E

2.3 System hardware overview

Main board

The main board houses the microprocessor, and supporting electronics for controlling the operation of the
Model 7100E Analyzer. The main board receives the sensor input and provides the control and display
functions of the analyzer.

Relay board

The relay board houses relay contacts for all of the Alarm and Control features of the 7100E. The relays
are mapped discretely to each alarm to provide electrical outputs for reporting and process control use.

Power supply

The power supply board is designed to take 110/220 VAC, 50/60 Hz mains power input. The supply is
fused directly on the board. Optional 12 VDC and 24 VDC power supplies are available for installations
where a DC voltage is required to power the Model 7100E. A 12 VDC battery-backup power input
(battery not provided) is also provided to act as an emergency back up in case of mains power failure.

Display board

The display board is designed to generate a digital indication of the concentration of oxygen (Appendix E
– range / output chart), and fault codes (section 4.3.1). The display is a 7-segment, 0.75" alphanumeric
LED.

Control panel

The control panel serves as the main user interface. The Control Panel features the keypad (ramp-UP,
ramp-DOWN, and MODE keys) and the status LEDs. The control panel is designed to be splash and
water-resistant. There are #8-32 threaded mounting studs at each of the four corners for flush mounting
the unit to a control or equipment panel. The front control panel with neoprene gasket is suitable for
NEMA type 4 / IP66 environments when properly installed.
Manual P/N: C5-06-4900-14-0 Revision A, dated 24-Jun-2016
Introduction and overview
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