Configurable as a dual setpoint alarm, this DC-powered RTD input limit alarm features high or low trips and failsafe or non-failsafe operation. In addition, this alarm features a temperature range of 0 to 250°C to ensure accuracy and maximize setpoint resolution.
Configurable as a dual setpoint alarm, this DC-powered RTD input limit alarm features high or low trips and failsafe or non-failsafe operation. In addition, this alarm features a temperature range of 0 to 250°C to ensure accuracy and maximize setpoint resolution.
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Prevent false trips with this DC-powered RTD input limit alarm which repeatedly samples the input to make sure it remains beyond the setpoint for 100 milliseconds, uninterrupted. In addition, the input must fall outside the deadband and stay there for 100 milliseconds to return the alarm to an untripped condition.
Features
Diagnostic LEDS
This unit is equipped with three front panel LEDs. The dual function green LED is labeled INPUT and indicates line power and input signal status. Active DC power is indicated by an illuminated LED. If this LED is off, check DC power and the wiring connection. If the input signal is more than 110% of the full scale range, the LED will flash at 8 Hz. Below 0%, it flashes at 4 Hz. Two red LEDs indicate the relay state for each setpoint. An illuminated red LED indicates the tripped condition.
Output
This unit is equipped with two SPDT (form C) relays, rated at 120 V AC or 28 V DC at 5 A. Each of these relays is independently controlled by the field configurable setpoint and deadband.
Dynamic deadband
Circuitry in the unit prevents false trips by repeatedly sampling the input. The input must remain beyond the setpoint for 100 milliseconds, uninterrupted, to qualify as a valid trip condition. Likewise, the input must fall outside the deadband and remain there for 100 milliseconds to return the alarm to an untripped condition. This results in a "dynamic deadband" (based on time) in addition to the normal deadband.
Applications
| Inputs | Sensors: Pt100, Pt500, Pt1000 (0.00385Ω/°C); Cu10, Cu100; Ni120, NiFe604 Sensor connection: 3-wire Input range: 0 to 250°C |
| Isolation | 1800 V DC between contacts, input and power |
| EMC Compliance (CE Mark) | EMC: EN61326-1:2013 Safety: EN61010-2:2013 |
| Excitation Current (Maximum) | <2 mA for Pt100, Pt500, Pt1000, Ni120, Cu100 or NiFe604 <10 mA for Cu10 |
| Humidity (Non-Condensing) | Operating: 15 to 95% at 45°C Soak: 90% for 24 hours at 65°C |
| Leadwire | Resistance: 40% of base sensor resistance or 100 Ωs (whichever is less), maximum per lead Effect: Less than 1% of selected span over entire leadwire resistance range |
| Input Protection | Normal mode: Withstands ±5 V DC Common mode (input to gnd): 1800 V DC, maximum |
| Temperature Range | Operating: 5 to 131°F (-15 to 55°C) Storage: -13 to 158°F (-25 to 75°C) |
| LED Indicators | Input range (green): >110% input: 8 Hz flash;>-10% input: 4 Hz flash Setpoint (red): Tripped: Solid red; Safe: Off |
| Relay Contacts | 2 SPDT (2 form C) relays, 1 relay per setpoint Current rating (resistive) 120 V AC: 5 A; 240 V AC: 2 A; 28 V DC: 5 A Material: Gold flash over silver alloy Electrical life: 105 operations at rated load Note: External relay protection is required for use with inductive loads Mechanical life: 107operations |
| Stability | Line voltage: ±0.01%/%, maximum Temperature: ±0.05% of full scale/°C, maximum |
| Common Mode Rejection | DC to 60 Hz: 120 dB >60 Hz: 100 dB |
| Limit Differentials (Deadbands) | 0.25 to 5% of span |
| Setpoints | Effectivity: Setpoints are adjustable over 100% of the selected input span Repeatability (constant temperature): ±0.2% of full scale |
| Response Time | Dynamic deadband: Relay status will change when proper setpoint/ process condition exists for 100 msecond Normal mode (analog filtering): <250 mSec, (10 to 90%) |
| Power | Consumption: 1.5 W typical, 2.5 W maximum Supply range: 9 to 30 V DC, inverter isolated |
| Agency Approvals | CSA certified per standard C22.2, No. 0-M91 and 142-M1987 (File No. LR42272) UL recognized per standard UL508 (File No. E99775) CE conformance per EMC directive 2004/108/EC and low voltage directive 2006/ 95/EC RoHS compliant |
| Dimensions | 3.54 x 4.34 x 0.689" (90 x 110.2 x 17.5 mm) |
| Weight | 0.56 lbs (254.01 g) |
| Inputs | Sensors: Pt100, Pt500, Pt1000 (0.00385Ω/°C); Cu10, Cu100; Ni120, NiFe604 Sensor connection: 3-wire Input range: 0 to 250°C |
| Isolation | 1800 V DC between contacts, input and power |
| EMC Compliance (CE Mark) | EMC: EN61326-1:2013 Safety: EN61010-2:2013 |
| Excitation Current (Maximum) | <2 mA for Pt100, Pt500, Pt1000, Ni120, Cu100 or NiFe604 <10 mA for Cu10 |
| Humidity (Non-Condensing) | Operating: 15 to 95% at 45°C Soak: 90% for 24 hours at 65°C |
| Leadwire | Resistance: 40% of base sensor resistance or 100 Ωs (whichever is less), maximum per lead Effect: Less than 1% of selected span over entire leadwire resistance range |
| Input Protection | Normal mode: Withstands ±5 V DC Common mode (input to gnd): 1800 V DC, maximum |
| Temperature Range | Operating: 5 to 131°F (-15 to 55°C) Storage: -13 to 158°F (-25 to 75°C) |
| LED Indicators | Input range (green): >110% input: 8 Hz flash;>-10% input: 4 Hz flash Setpoint (red): Tripped: Solid red; Safe: Off |
| Relay Contacts | 2 SPDT (2 form C) relays, 1 relay per setpoint Current rating (resistive) 120 V AC: 5 A; 240 V AC: 2 A; 28 V DC: 5 A Material: Gold flash over silver alloy Electrical life: 105 operations at rated load Note: External relay protection is required for use with inductive loads Mechanical life: 107operations |
| Stability | Line voltage: ±0.01%/%, maximum Temperature: ±0.05% of full scale/°C, maximum |
| Common Mode Rejection | DC to 60 Hz: 120 dB >60 Hz: 100 dB |
| Limit Differentials (Deadbands) | 0.25 to 5% of span |
| Setpoints | Effectivity: Setpoints are adjustable over 100% of the selected input span Repeatability (constant temperature): ±0.2% of full scale |
| Response Time | Dynamic deadband: Relay status will change when proper setpoint/ process condition exists for 100 msecond Normal mode (analog filtering): <250 mSec, (10 to 90%) |
| Power | Consumption: 1.5 W typical, 2.5 W maximum Supply range: 9 to 30 V DC, inverter isolated |
| Agency Approvals | CSA certified per standard C22.2, No. 0-M91 and 142-M1987 (File No. LR42272) UL recognized per standard UL508 (File No. E99775) CE conformance per EMC directive 2004/108/EC and low voltage directive 2006/ 95/EC RoHS compliant |
| Dimensions | 3.54 x 4.34 x 0.689" (90 x 110.2 x 17.5 mm) |
| Weight | 0.56 lbs (254.01 g) |
