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3V lithium coin cell battery backup – CR1220
Dimensions and weight
With Window 3.08” x 3.15” x 0.76” [78.17 x 80 x 19.30]mm
Without Window 2.21” x 3.15” x 0.69” [56.13 x 80 x 17.52]mm
Weight 2.7oz [77g]
Absolute Maximum Ratings
DC Input …………………………………+4.2V to + 27V
Power ……….………………………………………1000mW
Operating Temperature …………….. 0°C to 85°C
Operating Temperature …………….. 0°C to 70°C with battery backup
Operating Humidity 10-90% non-condensing
RS485 EIA/TIA-485 Differential half-duplex
Maximum ………………….………… +/-14V
RS232 EIA/TIA-232
Rx ….….……………….………..…… +/- 25V
TX ……..…………………….….…… +/- 13.2V
EIA/TIA-562 TTL Line Buffered (non-inverting)
Input Maximum ……………...….……5.5V
Output ………………….………………….3.3V
Logic Low …………….………0.4V (16mA)
Logic High……………………2.4V (-16mA)
Serial baud rate …………………… 9600 - 230400 [115200 baud is recommended]