Overview
The ATC Shawnee II Series 355 is a four-digit panel-mounted digital timer module engineered for reliable process control in industrial automation environments. A compact version of the 335 Timer, the ATC 355 is its exact functional duplicate, packaged in a 72mm² DIN-size housing, occupying 40% less panel space. This used unit delivers proven solid-state performance with no moving parts in its logic circuits, making it an economical choice for replacement or upgrade applications.
Key Features
- True plug-in design with replacement possible in seconds without disturbing the housing or disconnecting wiring; dial assembly is gasketed for dust-tight operation
- Covers overall timing span of 0.01 SEC to 999.9 MIN in two field-convertible ranges; offering two additional field-convertible ranges of 0.1–999.9 SEC or MIN
- Cycle progress indication on four-digit display located above the digital setting number wheels
- Easily set even with work gloves on; push toggle levers in any sequence; can decrease or increase each number; setting changeable even during a cycle
- Two output relays (DPDT instantaneous and DPDT delayed) with high-visibility vacuum fluorescent digital display
Technical Specifications
- Load relay life expectancy: 100,000,000 operations (no load)
- Solid-state construction with computer-tested plug-in circuit boards; no moving parts in logic circuits, practically unlimited life expectancy
- Housing: 72mm × 72mm DIN-size plug-in
- Weight: 1.5 lbs
- Certifications: UL, CSA, CE approved
- Display: High-visibility vacuum fluorescent, four-digit
- Output Relays: Two DPDT (instantaneous and delayed)
Typical Applications
The ATC 355 is suited for process automation requiring precise timing intervals, including:
- Industrial heating and cooling control cycles
- Machine cycle timing and sequencing
- Pump start/stop delay timing
- Conveyor and material handling timing
- Panel-mount control systems
Compatibility & Replacements
Compatible With
- Standard 72mm DIN-size panel mount enclosures
- AC line frequency timebases (50 Hz or 60 Hz utility line)
- Dual output relay configurations for instantaneous and time-delay control
Replaces / Drop-In Replacement For
- Direct replacement for 355A & 355B models
Works With
- Standard AC power supplies (120 VAC, 240 VAC, 50/60 Hz)
- Industrial control relay logic systems
- PLC auxiliary timing modules
- Process control and sequencing circuits
