SNAP Isolated Analog Input Modules Features SNAP Isolated Analog Input Modules Description SNAP I/O isolated analog input modules provide two channels isolated from each other, thereby eliminating problems caused by ground loop currents. These isolated analog modules are part of Opto 22's SNAP PAC System and mount on SNAP PAC racks with an I/O processor (brain or on-the-rack controller). Since many SNAP analog input modules are software-configurable and handle a wide variety of signal levels, a small number of modules can support a full range of analog input requirements. Modules provide high resolution for precise signal levels, as well as dual-channel packaging. All SNAP analog modules are factory calibrated. Part numbers ending in -FM are Factory Mutual approved. Dimensional drawings are on pages 11-14. SNAP analog input modules have an on-board microprocessor to provide module-level intelligence, making them an ideal choice for Original Equipment Manufacturers (OEMs). For more information about the standalone operation of SNAP analog modules, see the SNAP I/O Module Integration Guide (Opto 22 form #876). Notes for legacy hardware: These modules can also be used with SNAP Simple, SNAP Ethernet, and SNAP Ultimate brains, as well as SNAP mistic brains such as the serial B3000. These modules can be installed on M-series or B-series mounting racks. (4,000 V for 1 ms) protection for sensitive control electronics from industrial field signals. Channel-to-channel isolation gives you complete freedom from ground-loop problems even on grounded devices connected to channels on the same module. Part Numbers Part Isolated two-channel 0 to 10 amp RMS AC/DC input 2 SNAP-AIVRMS-i SNAP-AIVRMS-i-FM* Isolated two-channel 0 to 250 V RMS AC/DC input 3 SNAP-AIMA-i Isolated two-channel analog current input -20 mA to +20 mA 4 Isolated two-channel analog SNAP-AIMA-iSRC current input -20 mA to +20 SNAP-AIMA-iSRC-FM* mA, with loop sourcing 5 Isolated two-channel analog current input -1 mA to +1 mA 6 SNAP-AITM-i Isolated two-channel analog type E, J, or K thermocouple or -150 mV to +150 mV input or -75 mV to +75 mV input 7 SNAP-AITM2-i Isolated two-channel analog type B, C, D, G, N, T, R, or S thermocouple or -50 mV to +50 mVDC input or -25 mV to +25 mVDC input 8 SNAP-AIV-i Isolated two-channel analog voltage input-10 VDC to +10 VDC or -5 VDC to +5 VDC 9 SNAP-AIV2-i Isolated two-channel analog voltage input -100 VDC to +100 VDC or -50 VDC to +50 VDC 10 * Factory Mutual approved DATA SHEET SNAP-AIMA2-i Form 1182-081111 Transformer isolation prevents ground loop currents from flowing between field devices and causing noise that produces erroneous readings. Ground loop currents are caused when two grounded field devices share a connection, and the ground potential at each device is different. Optical isolation provides 4,000 volts of transient See pg SNAP-AIARMS-i SNAP-AIARMS-i-FM* Isolation All SNAP analog input modules are transformer isolated as well as optically isolated from all other modules and from the SNAP brain or on-the-rack controller. In addition, the modules described in this data sheet feature two channels isolated from each other. Description SNAP Isolated Analog Input Modules Channel-to-channel isolation Rugged packaging and convenient pluggable wiring. Accepts up to 14 AWG wire. Factory calibrated; no user adjustment necessary Out-of-range indication Operating temperature 0 C to 70 C PAGE 1 SNAP Isolated Analog Input Modules Isolated Voltage Input Module -100 VDC to +100 VDC or -50 VDC to +50 VDC Part Number SNAP-AIV2-i Description Isolated two-channel analog voltage input -100 VDC to +100 VDC or -50 VDC to +50 VDC Description SNAP Isolated Analog Input Modules The SNAP-AIV2-i module can be configured for either -100 VDC to +100 VDC or -50 VDC to +50 VDC operation on each channel. The SNAP-AIV2-i provides two channels that are isolated from each other. Since these channels do not share any common connections, grounded sensors and field devices may be used with them. Specifications DATA SHEET Form 1182-081111 IMPORTANT: The mounting rack connector has 24 pins; the module connector has 20 pins. The extra pins on the mounting rack connector prevent misalignment of the module during installation. PAGE 10 Input Range From -100 volts to +100 volts From -50 volts to +50 volts Resolution 4.0 mV when configured -100 volts to +100 volts 2.0 mV when configured -50 volts to +50 volts Input Filtering -3 dB @ 64 Hz Input Response Time (% of span/ DV / Dt) 63.2% / 6.7 V / 10 mS DC Common Mode Rejection >-120 dB AC Common Mode Rejection >-120 dB @ 60 Hz Maximum Survivable Input 220 VAC or 300 VDC Maximum Operating Common Mode Voltage 250 V Accuracy 0.05%, 50 mV @ 100 VDC 25 mV @ 50 VDC Gain Temperature Coefficient 30 PPM/ C Offset Temperature Coefficient 15 PPM/ C Isolation: Optical 4000 V Isolation: Transformer 1500 V Isolation: Channel to Channel 250 V continuous (1500 V transient) Power Requirements 5 VDC (0.15) @ 200 mA Input Resistance 1 megohms (each channel) Ambient Temperature: Operating Storage 0 C to 70 C -25 C to 85 C SNAP Isolated Analog Input Modules Dimensional Drawing All Modules Except SNAP-AITM-i and SNAP-AITM2-i SNAP Isolated Analog Input Modules Form 1182-081111 DATA SHEET PAGE 11 DATA SHEET Form 1182-081111 SNAP Isolated Analog Input Modules SNAP Isolated Analog Input Modules Dimensional Drawing PAGE 14