Model 8555 Strain Gage to Frequency Model 8555 analog to frequency converter offers a cost effective solution for a single or multiple channel PLC I/O system. It is designed to operate into the PLC high speed counter inputs. The input range of 0 to 50mV makes the 8555 compatible with most strain gage based load cell or pressure transducer outputs. The built-in 10V excitation supply is capable of driving one 350 ohm bridge. The 8555 output for all modules is linear to 0.01% with a very high accuracy of better than 0.1%. The output is an isolated floating optocoupler transistor which provides DC isolation from the input and DC power. Connections are made easily accessible with screw clamp terminal blocks. FULL BRIDGE CONNECTION Model 8555 Strain Gage to Frequency SINGLE ENDED Model 8555 mV Input Model 8555 Input 0 to 50 mV Differential or Single Ended Signal Resistance 1000 megohm Current 10 nA Common Mode 0 to +5 Volts 0 to 5 kHz Floating Optocoupler Transistor 7 mA Pulse - 50 µSec Width 10 microvolts, 12 Bits Output Resolution Bridge Excitation 10 Volts for One 350 Ohm Bridge Pow er Requirements 24 VDC @ 45 mA Environment Operating 0°C to +55°C Storage -40°C to +80°C Siz e 1.65"H x 1.06"W x 3.78"L (42 x 27 x 96 mm) Weight 3 oz. (85 grams) Agency Approvals UL 508, C22.2 No 14-M91, UL 1604, C22.2 No 213-M1987 2401 Stanwell Drive • Concord, California 94520 • Ph: 925/687-4411 or 800/542-3355 • Fax: 925/687-3333 • www.calex.com • Email: [email protected] 1 3/2001