Description
Product Parameters
- Model Number: UNISAB II 1606-001
- Part Number: 9836-7002
- Manufacturer: Lang & Stelman (for Sabroe / Johnson Controls)
- Application: Mission Oil Control / Compressor Management
- Input Voltage: 24V AC/DC or 115V/230V AC (Configuration dependent)
- Display Type: Integrated vacuum fluorescent or LCD status window
- Processor: 16-bit industrial microcontroller architecture
- Communication: RS-485 / Sabroe proprietary Serial Link
- Input Channels: Analog inputs for pressure and temperature (PT100/4-20mA)
- Output Channels: Digital relay outputs for solenoid and motor starter control
- Enclosure: Ruggedized metal housing for engine room bulkhead mounting
The Lang & Stelman UNISAB II 1606-001 (9836-7002) is a specialized microprocessor-based controller designed for the automated management of oil systems and compressors in marine refrigeration and boiler plants. This unit functions as the central intelligence for “Mission Oil” applications, monitoring critical lubrication parameters and pressure differentials to ensure mechanical integrity while providing a local interface for manual overrides and system diagnostics in harsh maritime environments.
Differences from Similar Models
The 1606-001 is a legacy powerhouse with specific technical distinctions compared to both older UNISAB I and newer UNISAB III systems:
- Hardware Architecture: Unlike the modular UNISAB III, the 1606-001 UNISAB II is a more “all-in-one” design, integrating the power supply and I/O processing on a single mainboard (9836-7002) for increased vibration resistance.
- Protocol Compatibility: This model is specifically tuned for the Sabroe “SMC” and “CMO” compressor series, utilizing firmware optimized for reciprocating oil pump curves that differ from the screw-compressor logic found in the 1606-002 variants.
- Component Longevity: The 9836-7002 PCB revision uses high-tolerance industrial capacitors designed for the elevated ambient temperatures of a boiler room, distinguishing it from standard HVAC-grade controllers.
- Display Interface: While modern units use full graphical touchscreens, the 1606-001 utilizes a high-contrast character display that remains readable even in low-light engine rooms or under direct glare.
Product Operation Tips
- Pressure Sensor Calibration: Periodically verify the 4-20mA pressure transducers against a manual gauge. The UNISAB II relies heavily on these readings for oil differential safety trips, and sensor drift can cause unnecessary system shutdowns.
- EPROM Protection: The system firmware is stored on a physical EPROM chip. Ensure the protective “window sticker” is intact; exposure to high-intensity UV light or electrical surges during welding on the ship’s hull can corrupt the internal logic.
- Terminal Block Torque: Marine vibrations frequently loosen screw terminals. During biannual maintenance, check the tightness of the power and communication lines to the 9836-7002 board to prevent intermittent “Communication Fail” alarms.
- Battery Replacement: The 1606-001 uses a small lithium battery to retain setpoint data during power outages. If the unit loses its configuration after a blackout, the battery on the mainboard likely requires replacement to avoid manual reprogramming.
