Overview
The Sick ZLM1-C1121S03S10 is a ZoneControl Zero Pressure Accumulation (ZPA) logic module engineered for industrial accumulation conveyor systems. ZPA control systems accumulate and release product with zero forward pressure, reducing product damage and mechanical wear on conveyor infrastructure. This module integrates pneumatic valve control logic into a compact unit, serving as the core control element in ZoneControl systems that coordinate multiple sensors, logic circuits, and actuators across daisy-chained accumulation zones.
Key Features
- 24V DC supply voltage (≥21.6 V) for reliable Class 2 sourced power
- IP40/NEMA 1 enclosure rating provides protection in light industrial environments
- Air-to-Drive (AtoD) pneumatic valve output for single and slug release control
- Integrated ZPA logic circuit reduces wiring complexity in multi-zone systems
- Daisy-chain capability supports multiple modules in series with proper power isolation
- ABS plastic housing with shock and vibration resistance per IEC 68
Technical Specifications
Electrical: Supply voltage ≥21.6 V DC (nominal 24V); current consumption 60 mA (without load, deenergized); Class 2 power source required; ripple <5 Vpp.
Mechanical: Dimensions 30 mm W × 110 mm H × 70 mm D; weight approximately 1.0 lb; plastic ABS housing.
Environmental: Operating temperature –10 °C to +55 °C; storage temperature –40 °C to +75 °C; IP40 protection class.
Pneumatic Valve Control: Mode of operation: Air to Drive (NC); coil rating 24 V DC, 1 W; operating pressure range 0–4.5 bar; connection type: compressed air 3/8″ diameter, control line 1/4″ diameter; response time: partially open 10 ms, fully open 23 ms, close 21 ms.
Compatibility: Designed for ZoneControl ecosystem; supports single accumulation and single/slug release types.
Typical Applications
- Multi-zone accumulation conveyor systems for manufacturing and material handling
- Package and case handling in food, beverage, and pharmaceutical production
- E-commerce fulfillment center sortation and buffering
- Automotive parts and component assembly line buffering
- Warehousing automation with zero-pressure product flow
Compatibility & Replacements
Compatible With
- ZoneControl family of ZPA sensors (WTR1, WTR2, WLR2100 series)
- Pneumatic solenoid valves with 3/8″ compressed air connection and 1/4″ control line
- ZoneControl Interface Modules (ZIM) for multi-power-supply configurations
- Standard 24 V DC power supplies rated for Class 2 operation
Replaces / Drop-In Replacement For
- ZLM1 series variants (verify exact variant compatibility)
- Verify specific replacement compatibility with your system integrator or facility controls documentation
Works With
- ZoneControl daisy-chain wiring protocol and slug termination cables
- Single Acc (Single Accumulation) logic configurations
- Air-to-Drive (AtoD) and Air-to-Brake (AtoB) accumulation control strategies
- Standard pneumatic control line routing (1/4″ tubing)
