Limit Alarms are setpoint controllers that regulate industrial processes -- discrete, batch or continuous. Two-position controllers simplify processes through automation, and by removing personnel from tedious and possibly harmful environments.

Alarms are indicators of problems -- be they production line faults, process upsets, equipment failures or control system abnormalities. Limit alarms safeguard industrial facilities and workers by alerting and informing process personnel of abnormal conditions.

The AP1000 Series
As with all Action Pak Signal Conditioners, the 1000 Series Limit Alarms are compact, electronic plug-in modules that receive direct sensor inputs and operate directly from 120VAC line power or 24 VDC power on some models.

The AP1000 Series Alarms provide the broad range of limit alarm and control capabilities required in today's and tomorrow's industrial processes.

Alarm Flexibility
The AP1000 Series satisfies the need for compact signal-conditioning equipment that 1) provides the flexibility of a separate, individual limit or on/off control device, 2) accepts a variety of direct sensor or transducer inputs, and, 3) provides either Single-Trip, Latching or Dual-Trip relay outputs.

The Action Pak 1000 Series provides many combinations of sensor input, setpoint control and relay output selection for most conventional process and industrial alarm/control applications.

Hard Control/Analog Back
Factory automation systems run the risk of central failures. A failure in a central system can prevent proper actions for critical conditions, resulting in costly down times and possible personnel injury. Redundancy and reliability are important concerns that are best met with Hard Control/Analog Back (HC/AB) alarm systems.

The AP1000 Series dedicated single-channel limit alarm provides excellent single-point control with a proven record of reliability.

Setpoint Control
Setpoint adjustment are available to suit many needs.

• Single-Turn or 10-Turn screwdriver adjust.
• 10-Turn clockface dial, for precise settings.

Setpoints are adjustable over the entire span to assure full-range alarm capabilities.

Field Configurable Alarms
The popular AP1000 series Limit Alarms are now field configurable. The DC input AP1080/90, the thermocouple input AP1280/90 and the AC input AP1680/90 can all be configured — in the field — by setting dip switches for input range or type, alarm function (HI/LO) and alarm state (failsafe/non-failsafe). This minimizes spare parts inventory and provides an off the shelf solution for virtually any alarm function.

Three-Year & Lifetime Warranties
Action Paks which contain our Application Specific Integrated Circuit (ASIC) have seventy percent fewer internal connections for higher reliability and carry a Lifetime Warranty. Other Action Paks are backed by Action Instruments' exclusive three-year warranty.