Signal Conditioner accepts strain gauge outputs.

Press Release Summary:



Model 8555 accepts 0 to 50 mV single ended or differential input, making it compatible with most strain gage based load cell or pressure transducer outputs. It has 0 to 5 kHz 7 mA pulse output with 50 psec pulse width, making it compatible with PLC high speed counters. Conditioner contains high impedance instrumentation amplifier and built-in 10 V excitation source for powering one 350-ohm load cell or strain gage. Unit is housed in DIN rail mount package.



Original Press Release:


Stain Gage/Load Cell Signal Conditioner


Calex Mfg. Co., Inc. of Concord California announces the Model 8555 signal conditioner. The 8555 is designed to accept a 0 to 50 mV differential input making the unit compatible with most strain gage based load cell or pressure transducer outputs. The 8555 can be used with a 0 to 50 mV single ended input as well. What makes the 8555 unique is that it has a frequency output which is designed to be compatible with PLC high speed counter inputs. The net result is an extremely low cost weighing or strain monitoring/control system consisting of an 8555 and a bare bones (no analog input capability) micro PLC.

The 8555 contains a high impedance, high grade instrumentation amplifier. The amplifier input impedance is 1000 Megohms. The output of the 8555 is a 0 to 5 kHz 7mA pulse with a 50 psec pulse width making it compatible with PLC high speed counters. Resolution is 12 bits. The output is proportional to the 0-50 mV input range, ie. 50 mV on the input equates to 5 kHz on the 8555 output. The output is linear to 0.01 % with a very high accuracy of better than 0.1 %. PLC ladder logic for setting up the 8555 is available from Calex upon request. The 8555 also includes a built-in 10 Volt excitation source for powering a load cell or strain gage. The built-in supply provides sufficient current to power one 350 Ohm strain gage/load cell.

The 8555 is powered off 24 Volts DC. The unit is housed in a DIN rail mount package which measures 1.65" x 3.78" x 1.06"W. The operating temperature range for the unit is 0 to 55°C. The 8555 is UL 508 and 1604 approved. The 8555 is backed by Calex's five year warranty. List price for the 8555 is $125. For additional information, contact CALEX Mfg. Co., Inc., 2401 Stanwell Dr., Concord, CA, 94520 web: www.calex.com email: sales@calex.com, ph: 800-542-3355 or 925-687-4411, fax: 925-687-3333.

2401 Stanwell Drive, Concord, CA 94520-4841; 800-542-3355; (925) 687-4411; FAX: (925) 687-3333; Email: calex@calex.com; www.calex.com

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