SNAP Analog Input Modules
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
SALES 800-321-6786 • 951-695-3000 • FAX 951-695-3095 • sales@opto22.com • SUPPORT 800-835-6786 • 951-695-3080 • FAX 951-695-3017 • support@opto22.com
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SNAP Analog Input Modules
DATA SHEET
Form 1065-140815
PAGE
19
RTD Input Modules (continued)
Specifications
SNAP-AIRTD-1K SNAP-AIRTD SNAP-AIRTD-10
3-wire RTD input
1000 ohm platinum @ 0 °C
α= 0.00385
1000 ohm nickel @ 0 °C
α= 0.00618
1000 ohm nickel @ 70 °C
α= 0.00637
100 ohm platinum;
α= 0.00385
100 ohm nickel, -60 to 250 °C
120 ohm nickel, -80 to 260 °C
10 ohm copper; α= 0.00428
Input Temperature Range
-200 °C to 850 °C
(-328° to +1,582° F)
-200 °C to 850 °C
(-328° to +1,582° F)
-180 °C to 260 °C
(-292° to +500° F)
Input Range 0 to 4000 ohms 0 to 400 ohms 0 to 25 ohms
Over-Range Limit to 4400 ohms to 440 ohms to 27.5 ohms
Resolution (average) 0.042 °C (0.16 ohms) 0.042 °C (0.016 ohms) 0.026 °C (0.001 ohms)
Input Filtering -3 dB @ 0.1 Hz -3 dB @ 0.1 Hz -3 dB @ 100 Hz
Data Freshness (Max) 100 ms 100 ms 168 ms
Lead Compensation
Automatic when used with
SNAP brains
Automatic when used with
SNAP brains
Automatic when used with
SNAP PAC brains
DC Common Mode Rejection >-120 dB >-120 dB >-120 dB
AC Common Mode Rejection >-120 dB at 60 Hz >-120 dB at 60 Hz >-120 dB at 60 Hz
Excitation (typical) 0.256 mA constant current 1.25 mA constant current 5.4 mA constant current
Maximum Lead Resistance
>40 ohms single wire (all
leads to be equal resistance)
>40 ohms single wire (all leads
to be equal resistance)
>15 ohms single wire (all
leads to be equal resistance)
Maximum Fault Voltage at Input
(between any 2 field wires)
±15 V ±15 V ±15 V
Maximum Operating Common
Mode Voltage
250 V 250 V 250 V
Accuracy
From factory
After setting gain and offset
0.8 °C
0.6 °C
0.8 °C
0.6 °C
0.6 °C
0.5 °C
Isolation 1500 V 1500 V 1500 V
Power Requirements 5 VDC (±0.15) @ 190 mA 5 VDC (±0.15) @ 190 mA 5 VDC (±0.15) @ 190 mA
Operating Temperature 0 °C to 70 °C 0 °C to 70 °C 0 °C to 70 °C
Storage Temperature -40 °C to 85 °C -40 °C to 85 °C -40 °C to 85 °C
Wire size 22 to 14 AWG 22 to 14 AWG 22 to 14 AWG
Torque, hold-down screws 4 in-lb (0.45 N-m) 4 in-lb (0.45 N-m) 4 in-lb (0.45 N-m)
Torque, connector screws 5.26 in-lb (0.6 N-m) 5.26 in-lb (0.6 N-m) 5.26 in-lb (0.6 N-m)
Agency Approvals CE, RoHS, DFARS UL, FM, CE, RoHS, DFARS CE, RoHS, DFARS
Warranty Lifetime Lifetime Lifetime
