AP1280/1290 Configurable Limit Alarms
AP1280/1290 Configurable Limit Alarms Action Pak models AP1280 and AP1290 limit alarms offer wide ranging input and flexible setpoint capability. They accept six popular thermocouple types with inputs ranging from -270°C (-450°F) to 3200°C (5800°F). The AP1280 provides a single-setpoint alarm while the AP1290 provides two independent setpoint alarms. The AP1280 and AP1290 also include 0.25%-50% adjustable deadbands and selectable 120/240VAC operation.
Models AP1280-2000 and AP1290-2000 are equipped with dual function diagnostic LED. The green center LED indicates line power and input signal status. Active line power is indicated by an illuminated LED. If the center LED is off, check line power and the wiring connection. If the input signal is above 100% full scale, the LED will flash at approximately 8Hz. Below 0%, the flash rate is approximately 4Hz.
The field configurable AP1280 and AP1290 limit alarm setpoints can be configured for HI, LO, latching or failsafe trip operation. Non-latching HI and LO setpoints have respective HI and LO deadbands. In a tripped condition, the setpoint is exceeded and the appropriate red LED will illuminate. The trip will reset only when the process falls below the HI deadband or rise above the LO deadband. To reset a latched setpoint the signal must be in the safe region and the line power turned off for at least 5 seconds. For proper deadband operation, a HI setpoint must always be set above a Lo setpoint.
Note: To maximize thermal stability, final calibration should be performed in the operating installation, allowing approximately 1 – 2 hours for warmup and thermal equilibrium of the system.
Setpoint: Set deadband at its minimum (about 20 turns Counter Clockwise) before adjusting the setpoint. With the specified trip voltage or current input applied, adjust setpoint until the relay trips. For HI trip calibration, start with the setpoint above the desired trip. For LO trip calibration, start below the desired trip.
Deadband: Set deadband to its minimum (about 20 turns Counter Clockwise). Set setpoint to desired trip. Adjust voltage/current input until relay trips. Readjust deadband to 50% (20 turns CW). Set voltage/current input to desired deadband position. Slowly adjust deadband until relay untrips.
- E Type (-270 to 1000 deg C)
- J Type (-210 to 760 deg C)
- K type (-270 to 1372 deg C)
- R Type (0 to 1760 deg C)
- S type (0 to 1760 deg C)
- T Type (-270 to 390 deg C)
- Impedance: <1.5 microamp
Common Mode (Input to Ground)
600V AC or 1000 V DC, Max
Input Range (Green)
- >100% input: 8Hz flash
- <0% input: 4Hz flash
- Tripped: Solid red
- Safe: Off
Range .25% to 50% of span
Response Time: Dynamic Deadband:
Relay status will change when proper setpoint/process condition exists uninterrupted for 100ms
Normal Mode (analog filtering)
Setpoints are adjustable over 100% of the selected input span.
Repeatability (constant temp):
- +/- .2% for inputs > 0 deg C
- +/- .3% for inputs < 0 deg C
- Line Voltage: ± .01%, max.
- Temperature: ± .05% of full scale/°C, max.
Common Mode Rejection
DC to 60Hz: 120dB
1000 VDC between contacts, input and power
Meets IEC 801-2, Level 2 (4KV)
- Operating: 15 to 95% (@ 45°C)
- Soak: 90% for 24 hours (@ 45°C)
- Operating: -15 to 60°C (5 to 140°F)
- Storage: -25 to 70°C (-13 to 158°F)
- Consumption: 2W typical, 5W max
- Standard: selectable 120/240VAC, ±10%, 50-60Hz
- Optional: 9 to 30VDC, inverter isolated
AP1280: .72lbs; AP1090: .64lbs
- CSA certified per standard C22.2, No. M1982.
- UL recognized per standard UL508.