931S-C221

The 931S-C221 smart analog signal converter is a signal conditioner from the Allen-Bradley Bulletin 931S product line of signal conditioners that is designed to improve signal quality from field devices to a control system. The 931S-C221 signal conditioner converts analog current input signals to voltage output signals, and it has a 3-way galvanic isolator which provides voltage isolation between the input, output, and power supply, thus providing noise and transient protection. The 931S-C221 signal conditioner has removable terminals with error-proof keys for easy field installation, and it requires no additional configuration before user. The 931S-C221 signal conditioner has a supply voltage range of 20 to 30 Volts DC and a current rating of 60 milliamps. This device has a maximum accuracy range of ±0.1% of the full-scale range (FSR) and a step response time of 0.5 milliseconds.

The 931S-C221 signal conditioner has an isolation rating of 2,000 Volts (between the input, output, and power supply) and a rated impulse voltage withstand of 4,000 Volts. This device has a passive/active 2/3-wire loop-powered transmitter input with 0 to 20 milliamps or 4 to 20 milliamps of input signal range and a sensor voltage supply rating of 17 Volts DC at 20 milliamps. The 931S-C221 signal conditioner has 1 active output with 0 to 10 Volts DC or 2 to 10 Volts DC output signal ranges and a load impedance rating of 600 Ohms. The 931S-C221 signal conditioner has an IP 20 (indoor-only) environmental protection rating and an operating temperature range of -20 to 60 degrees Celsius. This device weighs approximately 110 grams, and it has total dimensions of 0.49 x 4.58 x 4.47 inches. The 931S-C221 signal conditioner is c-UL-us, CE, ATEX, IECEx, KC, RCM, and RoHS certified, and it has a T5 temperature code (with a hazardous area marking).