The VEX-112S-1 card is a 12 channel, programmable, bi-polar, constant voltage, intrinsically safe, excitation card. Programmable outputs include 0V, ±2.5V, ±5V, ±7.5V, ±10V and ±28V settable in groups of two with an output accuracy of ±0.15 percent maximum over the operating temperature range. Each output can provide up to 25 mA current and is short circuit protected.