Models SB-675/675ZP expand I/O capacity of Model DAS-1245 DAQ system for Palm handhelds. Specifically, each board supports 7 unipolar inputs in ranges from 0-50 mVdc to 0-24 Vdc, plus 7 bipolar inputs from ±25 mVdc to ±12 Vdc. Both also power sensors with +5 Vdc, +24 Vdc, or range of 5 adjustable levels from +2 to +15 Vdc. Model SB-675ZP halts voltage surges with high-impedance analog isolation for 4 analog channels, plus optical isolation for digital counter channel. Both models come with 24 Vdc power supply.