Can the E terminal be used to power other non-PACE sensors?
In some cases, yes. The E terminal provides a precise 5 vdc at a maximum current of about 20 milliamps. If you are logging at a fast sample rate (1Hz – 200Hz) the E terminal output is a constant 5 vdc. However, if you are logging at a standard rate (2 secs or slower), the E terminal output is pulsed for a short time just prior to the XR440 sampling its inputs (either 0.025 secs or 0.1 secs, depending on the selected Setup). This is done to insure a long battery life. So even if your non-PACE sensor’s power requirement is less than 20ma at 5vdc, it also needs a very fast warm-up time in order to work with the XR440.
