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English | SNAP-AIRTD SNAP 2-Ch 100-Ohm Platinum RTD Analog Temperature Input Module |
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Although the two channels are not isolated from each other, the module is transformer isolated and optically isolated
from other modules and devices. Modules are factory calibrated.
Part of the SNAP PAC System, the module mounts on a SNAP PAC rack with a SNAP PAC brain or rack-mounted
controller. Analog, digital, and serial I/O modules can all be on the same rack. Such an I/O unit is also well suited for
PC-based control or for use as intelligent remote I/O for an Allen-Bradley RSLogix PLC system, such as ControlLogix,
MicroLogix, or CompactLogix.
| 3-wire RTD input | 100-ohm platinum; α= 0.00385 |
| Input Temperature Range | -200 °C to 850 °C (-328° to +1,582° F) |
| Input Range | 0 to 400 ohms |
| Over-Range Limit | to 400 ohms |
| Resolution (average) | 0.042 °C (0.016 ohms) |
| Input Filtering | -3 dB @ 0.1 Hz |
| Data Freshness (Max) | 100 ms |
| Input Response Time (% of span/delta temp/delta time) | 63.2 %/598 °C/25 ms |
| Lead Compensation | Automatic when used with SNAP brains |
| DC Common Mode Rejection | >-120 dB |
| AC Common Mode Rejection | >-120 dB at 60 Hz |
| Excitation (typical) | 1.25 mA constant current |
| Maximum Lead Resistance | >40 ohms single wire (all leads to be equal resistance) |
| Maximum Fault Voltage at Input (between any 2 field wires) | ±15 V |
| Maximum Operating Common Mode Voltage | 250 V |
| Accuracy From factory After setting gain and offset | 0.8 °C 0.6 °C |
| Isolation | 1500 V |
| Power Requirements | 5 VDC (±0.15 ) @ 190 mA |
| Operating Temperature | 0 °C to 70 °C |
| Storage Temperature | -25 °C to 85 °C |
| Torque, hold-down screws | 4 in-lb (0.45 N-m) |
| Torque, connector screws | 5.26 in-lb (0.6 N-m) |
| Agency Approvals | UL, FM, CE, RoHS, DFARS |
| Warranty | Lifetime |