GEMINI 1 & 2 - 8 Pages
! SEALED FRONT PANEL CONSTRUCTION (NEMA 4/IP65)
! NON-VOLATILE MEMORY (E2PROM)
! ABILITY TO LOCK OUT FRONT PANEL FUNCTIONS
! SIMPLIFIED FRONT PANEL FOR PROGRAMMING EASE
! 6-DIGIT, 0.56" (14.2 mm) HIGH LED DISPLAY WITH NEGATIVE
SIGN & OVERFLOW INDICATORS
! FUNCTIONS AS COUNTER OR RATE INDICATOR
! INPUT SCALING FOR BUILT-IN RATE MULT./DIV.
! ACCEPTS INPUT COUNT RATES UP TO 10 KHz
! BI-DIRECTIONAL COUNTING, UP/DOWN CONTROL
! QUADRATURE SENSING (Up to 4 times resolution)
! ANTI-COINCIDENCE ADDITION AND SUBTRACTION
! SEPARATE INPUT FOR MAGNETIC PICKUPS
! SOLID-STATE CURRENT SINK OUTPUT(S)
! OPTIONAL RELAY OUTPUTS (Field Replaceable)
! PROGRAMMABLE OUTPUT TIME DELAYS
! UP TO THREE RIGHT-HAND “DUMMY ZEROS”
! FULL PROGRAMMABILITY OF DECIMAL POINT LOCATION AND
LEADING ZERO BLANKING
The Gemini 1000 and 2000 offer the features and performance of a
single/dual level preset counter or a programmable sample time rate indicator in
one economically priced package. The reliability of solid-state MOS technology
coupled with the flexibility of user programmable functions makes these units
ideally suited to handle practically any preset control application.
As a counter, the Gemini 1000/2000 offers a choice of six (6) programmable
counting modes to cover Bi-directional, Anti-Coincidence, and Quadrature
applications. The input circuitry is switch selectable to accept signals from a
wide variety of sources. In addition, the unit may be programmed to register
counts on both edges of the input signal thus providing frequency doubling
capability. 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 systems counter needs.
As a rate indicator, the Gemini 1000/2000 features crystal-controlled
accuracy along with a variety of data sampling times to allow the needed
resolution for precision applications. The combination of 5-digit scale factor
and decade scale multipliers provide a wide range of scaling correction for
direct readout in terms of units being measured.
The Gemini 2000 20 mA Current Loop Option provides the capability of
two-way communications between the Gemini 2000 and a variety of
equipment, such as a printer, remote terminal, 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 16 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 Count value, Scale Factor, and Preset values can be interrogated. The
Scale factor and Presets can be changed by sending the proper command codes
and numerical Data. Other functions such as resetting the count, and a
combined transmit count and reset can also be performed. Various “Print
Options” can be selected to automatically interrogate the Count Value, Preset,
or Scale Factor by activating the “Print Request” terminal when a printer is
being used, or by sending a “transmit per Print Options” (P) command. All
command codes and numerical data are sent in ASCII.
The construction of the Gemini 1000/2000 features a zinc 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 pluggable terminal strips
at the rear of the unit. Clamp-type pressure plate terminals accept stripped #14
AWG wire without lugs.
1. DISPLAY: 6-digit 0.56" (14.2 mm) High LED display.
2. POWER REQUIREMENTS:
AC Power: Switch selectable 115/230 VAC (±10%), 50/60 Hz, 20 VA
DC Power: 11 to 14 VDC @ 0.7 A max.
3. SENSOR POWER: +12 VDC (±25%) @ 100 mA max.
4. MEMORY: Non-volatile E2PROM memory retains all programming
information and count value when power is removed or interrupted.
5. INPUTS A & B: Switch selectable to accept count pulses from a variety of
sources including switch contacts, outputs from CMOS or TTL circuits, and
all standard RLC sensors.
Current Sourcing - Unit provides 3.9 KÙ pull-down load for sensors with
current sourcing outputs. Max. input voltage = 28 VDC @ 7 mA.
Current Sinking - Unit provides 7.8 KÙ pull-up load for sensors with
current sinking outputs. Max. sensor current = 1.6 mA.
Debounce - Damping capacitor provided for switch contact debounce.
Limits count speed to 100 Hz max. with 50% duty cycle.
GEMINI 1000/2000 - 6-DIGIT PRESETTABLE COUNTERS OR RATE INDICATORS
GEMINI 1000 - SINGLE LEVEL & GEMINI 2000 - DUAL LEVEL w/OPTIONAL 20 mA CURRENT LOOP
DIMENSIONS In inches (mm) Note: Recommended minimum clearance (behind the panel) for
mounting clip installation is 6.8" (173 mm) W.
Bulletin No. GEM1/2-E
Drawing No. LP0319
Tel +1 (717) 767-6511
Fax +1 (717) 764-0839
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