GEMINI 1 & 2
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1 ! 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 DESCRIPTION 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. SPECIFICATIONS 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 Released 1/05 Tel +1 (717) 767-6511 Fax +1 (717) 764-0839 www.redlion.net

2 PROGRAMMABLE FUNCTIONS UNIT PERSONALITY Functions as a Counter and Rate Indicator. PRESET(S) Range 0 to ±999999 SCALE FACTORS 5-digit input scaling, Range 0.0000 to ±5.9999. SCALE MULTIPLIER Multiplies the contents of the 9-digit internal counter by a factor of 1, 0.1, 0.01, or 0.001 to view the desired number of significant digits on the 6-digit display. COUNTING MODES Count with Inhibit Count with Up/Down Control 2-Input Anti-Coincidence Add 2-Input Anti-Coincidence Add/Subtract Quadrature Quadrature X4 RESET ACTION Reset-to-Zero: Output activates when count equals the preset value....

3 12. ENVIRONMENTAL CONDITIONS: Operating Temperature: 0 to 50°C Storage Temperature: -40 to 80°C Operating and Storage Humidity: 85% max. relative humidity (noncondensing) from 0 to 50°C. Altitude: Up to 2000 meters 13. CONSTRUCTION: Metal die-cast bezel, plastic case. This unit is rated for NEMA 4/IP65 indoor use. Installation Category II, Pollution Degree 2 14. WEIGHT: 2.1 lbs. (0.9 kg) PROGRAMMING The Gemini 1000/2000 input circuit set-up is programmed using DIP switches on the rear of the unit. All other functions are programmed through the front panel pushbuttons. To program or...