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GENERAL DESCRIPTION
The Gemini 5200 is a multi-function dual rate indicator which can fulfill
almost any rate indication application. The unit can operate as two independent
rate indicators, with scaling, decimal point placement, and update times,
separately programmable for each channel. The Gemini 5200 also has three other
unit personalities. These modes feature a third display channel, C, which can
indicate the ratio, difference or draw between the A and B rate channels.
The programming of the rate channels and the calculated display is very
straightforward. Setting up Channel C only requires programming the desired
amount of resolution (for ratio and draw) and the appropriate decimal point
location. The Gemini 5200 simply takes the two rate values and mathematically
calculates display C accordingly.
The Gemini 5200 20 mA Current Loop Communications option provides the
capability of two-way serial communications between the Gemini 5200 and a
variety of equipment, such as a printer, remote terminal, programmable
controller, or host computer. The baud rate can be set to 300, 600, 1200, or 2400
baud. The format for transmitted and received data is 1 start bit, 7 data bits, 1
parity bit (odd), and a stop bit. When utilizing an external power supply (30 VDC
max.), up to sixteen units can be installed in the loop, each with an individual
address. When utilizing the Gemini’s 20 mA current source, up to seven units can
be installed in a loop. The Rate Values, Presets, and Scale Factor can be
interrogated or changed by sending the proper command codes and numerical
data (if required) to the unit. Various “Print Options” can be selected to
automatically interrogate the Rate Values, Presets, and Scale Factor by
activating the “Print Request” terminal or by sending a “Transmit Per Print
Option” (P) command.
The construction of the Gemini 5200 features a metal die-cast bezel, offering
maximum durability with a high quality die-cast appearance. The sealed front
panel meets NEMA 4/IP65 specifications for washdown and/or dust when
properly installed. Clamp type pressure plate terminals accept stripped #14
AWG wire without lugs.
SAFETY SUMMARY
All safety related regulations, local codes and instructions that appear in the
manual or on equipment must be observed to ensure personal safety and to
prevent damage to either the instrument or equipment connected to it. If
equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.
Do not use this unit to directly command motors, valves, or other actuators not
equipped with safeguards. To do so, can be potentially harmful to persons or
equipment in the event of a fault to the unit.
PROGRAMMING THE GEMINI 5200
When your Gemini 5200 arrives from the factory, it has already been
programmed to function as a Dual Rate Indicator without the calculated C
display. It is programmed with the factory settings listed in the “Factory
Settings” section. If it is required to have the unit operate as a speed ratio, speed
difference or draw indicator, the Unit Personality function code can be changed
to do so.
The personality, functions, and modes are accessed by pressing the
appropriate keys as indicated by the embossed numbers above them. A function
is defined by a two-digit code which appears on the left side of the display. The
mode of that function is shown as a one-digit code on the right side of the display.
At times there will be a “-” sign modifier to the left of the mode.
Data for the Presets, Scale Factors and Timed Output Values are entered
differently. Each digit key controls the digit on the display directly above it.
Changing the digits can be done by repeatedly pressing the key beneath the digit
position you wish to change or by holding the key down. As you hold it down, or
repetitively press it, the value of that digit will change cyclically, counting up to
9, then to 0, and then up again. The 6 numbered keys correspond to the six digits,
and the “+/-” key corresponds to polarity.
PROGRAMMING THE PERSONALITY
Entering function and mode is easily accomplished by
pressing the appropriate digit key. For the personality
function, you would enter 41 by pressing the front panel
keys, 4 and 1.
The digits on the left side of the display show the function
code; the digits on the right side show the current
programmed mode.
A new mode selection is made by entering a new number.
On some of the entries, you have the option of a plus “+” or
minus “-” sign. In the cases where a “+” sign is required, no
sign will be displayed. If you do enter a “-” sign (using the
“+/-” key), a minus sign will be displayed in front of the
appropriate digit.
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