Red-lion GEMINI 42 User Manual
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! 6-DIGIT, 0.56" (14.2 mm) HIGH LED DISPLAY WITH NEGATIVE
SIGN OVERFLOW & DISPLAYED VALUE INDICATORS
! TWO DISPLAY CHANNELS: A[rate or count], B[count]
! SEPARATE INPUT SCALING FOR BOTH CHANNELS
! ACCEPTS COUNT RATES TO 10 KHz
! BI-DIRECTIONAL COUNTING, UP/DN CONTROL
! QUADRATURE SENSING (Up to 4 times resolution)
! SOLID-STATE CURRENT SINK OUTPUT(S)
! OUTPUT(S) ASSIGNABLE TO EITHER CHANNEL
! OPTIONAL 20 mA CURRENT LOOP FOR SERIAL DATA
COMMUNICATION
! RELAY OUTPUT(S) (Field Replaceable)
! PROGRAMMABLE TIMED OUTPUT(S) (0.01 to 599.99 sec.)
! ABILITY TO LOCK OUT FRONT PANEL FUNCTIONS
! SEALED FRONT PANEL CONSTRUCTION (NEMA 4/IP65)
! NON-VOLATILE MEMORY (E
2
PROM)
! PROGRAMMABILITY OF DECIMAL POINT LOCATION &
LEADING ZERO BLANKING
DESCRIPTION
The Gemini 4100 and 4200 offer the features of a single (4100) or dual
(4200) level, dual function Counter and Rate instrument or Dual Counter
instrument in one economically priced package. The Gemini 4000 Series is
ideally suited for applications where rate and count indication or control of a
process is desired or where batching and totalizing is needed.
The reliability of solid-state MOS technology coupled with the flexibility of
user programmability makes these units suited to handle practically any preset
control application.
There are two signal inputs to which the count or count control signals for
both channels are applied. The Gemini can operate under any one of six input
response modes: Count with Inhibit, Count with Up/Dn Control, Anti-
Coincidence Add/Subtract, Separate Input mode, or Quadrature modes. As a
Counter/Rate instrument, the rate indicator will utilize the same count signal
input as the counter except when in “Separate Input” mode, where the rate
channel will use one input and the counter channel the other. As a dual counter
instrument, both counters will utilize the signal inputs in the same manner. In
other words, in all modes except the “Separate Input” mode, a count pulse
applied to the input will affect both counters in the same manner.
The choice of several reset cycle modes along with the compatibility of count
and control inputs to other RLC products, provides added versatility for both
stand-alone and system counter needs.
The Rate Indicator portion uses a time interval method (1/tau) to calculate the
rate value. This method enables high resolution at all input rates. The unit
counts input pulses and after a programmable minimum update time has
occurred, it waits until the next count edge occurs, then takes the elapsed time
and number of edges and calculates the rate value.
At slower rates, averaging can be accomplished by programming the “Rate
Minimum Update Time” (0.5 sec. to 16 sec.) for the desired response. The
minimum input frequency is 0.03 counts/sec. or one pulse every 32 seconds.
Extensive scaling capabilities allow practically any desired reading at very slow
input rates.
The output(s) can be assigned to either the Rate or Count channel, or one
output to each. When programmed as a Dual Counter, both outputs can be
assigned to Counter B or Output 1 to Counter A and Output 2 to Counter B.
The 20 mA Current Loop Communications Option provides the capability of
two-way serial communications between the Gemini 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
1 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 Preset and Scale Factor can be changed by sending the proper
command codes and numerical data to the unit. Other functions, such as
resetting the various counters, can also be performed. Various “Print Options”
can be selected to automatically interrogate the Count 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 4000 Series features a metal die-cast bezel
offering maximum durability with a high quality appearance. The sealed front
panel meets NEMA 4/IP65 specifications for wash-down and/or dust when
properly installed. Electrical connections are made via plug-in terminal strips.
Clamp-type pressure plate terminals accept stripped #14 AWG wire without lugs.
GEMINI 4100/4200 - 6-DIGIT PRESETTABLE COUNTER/RATE OR DUAL COUNTER INDICATORS
GEMINI 4100 - SINGLE LEVEL & GEMINI 4200 - DUAL LEVEL
Note: Recommended minimum clearance (behind the panel) for
mounting clip installation is 6.8" (173 mm) W.
Bulletin No. GEM4-E
Drawing No. LP0320
Released 12/05
Tel +1 (717) 767-6511
Fax +1 (717) 764-0839
www.redlion.net
DIMENSIONS In inches (mm)
Summary of Contents
Page 1 - DIMENSIONS In inches (mm)
1! 6-DIGIT, 0.56" (14.2 mm) HIGH LED DISPLAY WITH NEGATIVESIGN OVERFLOW & DISPLAYED VALUE INDICATORS! TWO DISPLAY CHANNELS: A[rate or count],
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2SPECIFICATIONS1. DISPLAY: 6-Digit 0.56" (14.2 mm) High LED display2. POWER REQUIREMENTS:AC Versions:AC Power: Switch selectable 115/230 VAC, (±1
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3PROGRAMMINGThe Gemini 4000 Series input circuit set-up is programmed using DIPswitches on the rear of the unit. All other functions are programmed th
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4TYPICAL DUAL COUNTER APPLICATIONAmanufacturer of molded plastic parts wants to track the percentage of usableparts versus parts produced to determine
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