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 Loop Alarms™ Process/Alarm Switches accept inputs from thermocouples (1290), RTDs (1490). SPDT relay outputs can be set for latching or non-latching, direct or reverse action and high or low function. Output behavior is easily programmable via switches. Mount in standard 11-pin sockets.
SPECIFICATIONS
Isolation: 1500 Volts RMS between input, outputs and power.
Power Supply: 85-265 VDC/VAC, 50-400 Hz.
Setpoints: Adjustable from 0-100% of span.
Deadband: Adjustable from 0.25-100% of span.
Drift: ±0.02% /°C typical, ±0.05% /°C maximum.
Ambient Operating Temperature: 32 to 131°F (0 to 55°C) non-condensing.
Input Impedance: (1290) 3 megohms, Current input=10 ohms.
Search Current (1490): Cu 10 = 5 mA. Plt 100, Ni100, Ni120; = 500µA. Plt 500;, NiFe 1000, NiFe 2000 = 100 µA. Plt 1000; = 50µA.
Relay Output: SPDT, one set per setpoint, 5A @ 250 VAC resistive.
Latch Circuit Reset: Automatic at power up. Manual with reset switch.
Lead Compensation Error (1490): 0.02%/.
Indicators: One dual color LED per setpoint; red = On, green = Off.
Open Thermocouple Protection (1290): Selectable upscale or down-scale.
Dimensions: Including socket pins, 2-3/8" W x 3-7/16" H x 1-3/4" D (60.3 W x 87.3 H x 44.4 D mm).
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Model 1290 Input Type and Ranges
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Type E Thermocouple
-454 to +302°F (-270 to +150°C)
-454 to +554°F (-270 to +290°C)
32 to +302°F (0 to +150°C)
32 to +554°F (0 to +290°C)
32 to +1220°F (0 to +660°C)
32 to +1832°F (0 to +1000°C)
Type S Thermocouple
32 to 1922°F (0 to +1050°C)
32 to 3200°F (0 to +1760°C)
Type T Thermocouple
-454 to +410°F (-270 to +210°C)
-454 to +734°F (-270 to +390°C)
32 to 410°F (0 to 210°C)
32 to 734°F (0 to 390°C)
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Type J Thermocouple
-346 to +374°F (-210 to 190°C)
-346 to +680°F (-210 to 360°C)
32 to +374°F (0 to190°C)
32 to +680°F (0 to 360°C)
32 to +1400°F (0 to 760°C)
Type K Thermocouple
-454 to +482°F (-270 to +250°C)
-454 to +896°F (-270 to +480°C)
32 to 482°F (0 to 250°C)
32 to 896°F (0 to 480°C)
32 to 2501°F (0 to 1372°C)
Type R Thermocouple
32 to 1778°F (0 to 970°C)
32 to 3200°F (0 to 1760°C)
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Model 1490 Input Type and Ranges
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Pt 100, 500,1000 RTDs
32 to 212°F (O to 100°C)
32 to 572°F (O to 300°C)
32 to 932°F (O to 500°C)
Ni100 RTDs
-58 to +302°F (-50 to +150°C)
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Ni120 RTDs
-58 to +482°F (-50 to +250°C)
Cu10 RTDs
32 to 482°F (0 to 250°C)
NiFe 1000, 2000 RTDs
-58 to +392°F (-50 to +200°C)
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