The SNAP-AIRTD module is usually used for temperature inputs. It can also be used to make high-resolution resistance measurements. Since the two inputs share the same reference terminal, make sure you use isolated RTD probes. SNAP analog input modules are part of Opto 22’s SNAP PAC System. These modules mount on a SNAP PAC rack with a SNAP PAC brain or R-series controller, either a standard wired model or a Wired+Wireless model. SNAP analog input modules have an onboard microprocessor to provide module-level intelligence, which makes them an ideal choice for Original Equipment Manufacturers (OEMs).
Underwriters Laboratory, Factory Mutual, IEC 950: 1991-09, 89/336/EEC, 2002/95/EC, Defense Federal Acquisition Regulation Supplement