Teledyne ULTRAFLOW 150, Operation Manual, Page: 38 / 162

ULTRAFLOW 150 GAS FLOW AND TEMPERATURE MONITOR
Power Entry Module
Keypad/Front Panel Assembly
6.3 ELECTRICAL DESCRIPTION
6.3.1 Input Power Requirement
The Enhanced Remote Panel has been designed to operate over a wide range of
international power supply ranges and frequencies without the need for
modifications or adjustments. (
See Section 2.0 of this manual for input power
specifications.) The internal D.C. supply is auto-ranging and automatically
adjusts for the power mains voltage.
6.3.2 Circuit Description (Overview)
The Enhanced Remote Panel Mother Board with Multi I/O Board are two separate
networked devices mounted in a single package: the Enhanced Remote Panel
Mother Board node (hereafter referred to as the Enhanced Remote Display) and
Multi I/O Board node (hereafter referred to as the Multi I/O Board). Each have
independent software and a unique network address. They share a common
power supply and chassis. The Enhanced Remote Display acts as the operator
interface. The Multi I/O Board is the peripheral hardware interface.
6.3.2.1 Liquid Crystal Display (LCD)
The display is a graphics capable, 240x128 pixel, back-lit LCD. The Display
Driver Board is integral with the LCD and communicates to the Mother Board via
ribbon cable. The contrast and back-light brightness are adjustable from the
keypad.
6.3.2.2 Keypad
The Keypad is a light touch, membrane switch array. It is built into the front
panel assembly and connects directly to the Mother Board via a ribbon cable.
6.3.2.3 Front Panel LED’s
The Power, Fault, and Alarm LED’s are also integral to the front panel assembly.
They are connected to, and driven by, the Mother Board via a six pin ribbon cable
(J
3
).
6.3.2.4 Security Key Switch
The Security Key Switch is functionally in parallel with the administrator
password. Protected variables can be unlocked with the administrator password
or Key Switch.
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