Watlow Series 981c-10cc-AARG Temperature Controller

The Watlow Series 981c-10cc-AARG is a microprocessor-based PID temperature controller featuring auto-tuning capability and programmable multi-step profiles for precise thermal management in industrial processes. This 1/8 DIN form factor unit delivers flexible I/O configurations, non-volatile memory, and burst-fire control in a compact 4-inch deep enclosure rated NEMA 4X for harsh environments.

Technical Specifications

Control Architecture

• Auto-tuning PID with burst-fire control capability


• Four independent program files, each containing six steps (24 steps total)


• Files linkable into single 24-step sequences with guaranteed soak deviation


• Ramp-rate or time-based profile execution


• Program looping and remote start/hold capability


• Wait-for-event programming option


• Program status retention through power-loss events Sampling & Response


• Control outputs and single input: 10 Hz


• Dual input configuration: 5 Hz


• Display refresh: 2 Hz


• Retransmit, remote setpoint, and alarm outputs: 1 Hz Electrical


• Input: 24 to 28 V AC/DC (±10%, -15%)


• Frequency: 50/60 Hz (±5%)


• Maximum power consumption: 16 VA


• Factory-replaceable Slo-Blo® fuses: 2 A at 250 V (high voltage) or 5 A at 250 V (low voltage)


• Non-volatile memory preserves configuration after power failure

Key Features

• Accepts 11 thermocouple types (J, K, T, R, S, B, E, N), RTD, and scalable process inputs


• Secondary input factory-configured for slidewire feedback (gas valve applications)


• Up to two discrete event inputs


• SSR and relay control outputs with optional analog retransmit (0–10 V or 4–20 mA)


• Dual auxiliary outputs for time-based events or alarms


• Hardware and software parameter lockout for operator security


• Touch-safe terminals with #6 compression universal screws (28–14 gauge wire) Environmental


• Operating: 0 to 55°C, 0 to 90% RH non-condensing


• Storage: −40 to 85°C

Typical Applications Process heating, thermal profiling, gas valve modulation, and multi-stage cure cycles requiring precise setpoint management and event-driven logic.

Compatibility & Integration Direct integration with solid-state relays, electromagnetic relays, and analog control instrumentation. Supports thermistors and slidewire feedback systems for OEM integration.