Configurable as a dual setpoint alarm, this DC-powered DC input limit alarm features high or low trips and failsafe or non-failsafe operation. In addition, input voltage spans from 10 mV to 200 V, and input current spans from 1 to 100 mA and can be field configured.
Configurable as a dual setpoint alarm, this DC-powered DC input limit alarm features high or low trips and failsafe or non-failsafe operation. In addition, input voltage spans from 10 mV to 200 V, and input current spans from 1 to 100 mA and can be field configured.
Discontinued!
This product has been discontinued and is no longer available. There are no replacement options.
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Prevent false trips with this DC-powered DC 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 | Voltage range: 10 mV to 200 V Impedance: >100 K Ωs Overvoltage: 200 V rms, maximum Current: Range: 0 to 20 mA Impedance: 20 Ωs, typical Overcurrent: 170 mA rms, maximum Overvoltage: 60 V DC (protected by self resetting fuse) Common mode (Input to ground): 1800 V DC, maximum |
| LED Indicators | Input range (Green): >110% input: 8 Hz flash <0% input: 4 Hz flash Setpoint (Red) Tripped: Solid red Safe: Off |
| Limit Differentials (Deadbands) | >50 mV/5 mA: 0.25 to 5% of span <50 mV/5 mA: 1 to 5% of span |
| Response Time | Dynamic deadband: Relay status will change when proper setpoint/process condition exists for 100 msec Normal mode (analog filtering): <250 msec, (10 to 90%) |
| Setpoints | Effectivity: Setpoints are adjustable over 100% of the selected input span Repeatability (constant temperature): >50 mV/5 mA: 0.1% of full scale <50 mV/5 mA: 0.2% of full scale |
| Stability | Temperature: +0.05% of full scale/°C, maximum |
| Excitation Voltage | 24 V DC, 20 mA, maximum |
| Common Mode Rejection | DC to 60 Hz: 120 dB |
| Isolation | 1800 V DC between contacts, input and power |
| EMC Compliance (CE Mark) | EMC: EN61326-1:2013 Safety: EN61010-2:2013 |
| Humidity (Non-Condensing) | Operating: 15 to 95% at 113°F (45°C) Soak: 90% for 24 hours at 149°F (65°C) |
| Temperature Range | Operating: 32 to 131°F (0 to 55°C) Storage: -13 to 158°F (-25 to 70°C) |
| Relay Contacts | 2 SPDT (2 form C) relays One 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 contact protection is required for use with inductive loads Mechanical life: 107 operations |
| Wire Terminations | Screw terminations for 12 to 22 AWG |
| 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 |
| Power | Consumption: 1.5 W typical, 2.5 W maximum Supply range: 9 to 30 V DC, inverter isolated |
| 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 | Voltage range: 10 mV to 200 V Impedance: >100 K Ωs Overvoltage: 200 V rms, maximum Current: Range: 0 to 20 mA Impedance: 20 Ωs, typical Overcurrent: 170 mA rms, maximum Overvoltage: 60 V DC (protected by self resetting fuse) Common mode (Input to ground): 1800 V DC, maximum |
| LED Indicators | Input range (Green): >110% input: 8 Hz flash <0% input: 4 Hz flash Setpoint (Red) Tripped: Solid red Safe: Off |
| Limit Differentials (Deadbands) | >50 mV/5 mA: 0.25 to 5% of span <50 mV/5 mA: 1 to 5% of span |
| Response Time | Dynamic deadband: Relay status will change when proper setpoint/process condition exists for 100 msec Normal mode (analog filtering): <250 msec, (10 to 90%) |
| Setpoints | Effectivity: Setpoints are adjustable over 100% of the selected input span Repeatability (constant temperature): >50 mV/5 mA: 0.1% of full scale <50 mV/5 mA: 0.2% of full scale |
| Stability | Temperature: +0.05% of full scale/°C, maximum |
| Excitation Voltage | 24 V DC, 20 mA, maximum |
| Common Mode Rejection | DC to 60 Hz: 120 dB |
| Isolation | 1800 V DC between contacts, input and power |
| EMC Compliance (CE Mark) | EMC: EN61326-1:2013 Safety: EN61010-2:2013 |
| Humidity (Non-Condensing) | Operating: 15 to 95% at 113°F (45°C) Soak: 90% for 24 hours at 149°F (65°C) |
| Temperature Range | Operating: 32 to 131°F (0 to 55°C) Storage: -13 to 158°F (-25 to 70°C) |
| Relay Contacts | 2 SPDT (2 form C) relays One 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 contact protection is required for use with inductive loads Mechanical life: 107 operations |
| Wire Terminations | Screw terminations for 12 to 22 AWG |
| 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 |
| Power | Consumption: 1.5 W typical, 2.5 W maximum Supply range: 9 to 30 V DC, inverter isolated |
| Dimensions | 3.54 x 4.34 x 0.689" (90 x 110.2 x 17.5 mm) |
| Weight | 0.56 lbs (254.01 g) |
