ABB Bailey NLBS01 Local Bypass Station

Engineered for ABB Bailey INFI 90 Control Systems

This station provides manual and automatic bypass for control loops. It ensures continuous operation for the ABB Bailey NLBS01 unit. You will find this bypass station in INFI 90 distributed control systems. Unlike basic bypass switches, this version includes status indicators. It supports both local and remote bypass control modes.

Technical Specifications & Physical Dimensions

We designed this bypass station for critical process control applications. The table below presents all verified technical specifications.

Parameter	Specification
Physical Dimensions (W x H x D)	200mm x 150mm x 80mm
Total Weight	1.8 kg (1800 grams)
Bypass Channels	1 independent loop
Input Voltage Range	24V DC nominal (18V – 32V)
Contact Rating	10 Amps at 250V AC
Bypass Modes	Manual or automatic (selectable)
Component Count	2 relays, 4 indicator LEDs, 1 selector switch

Functional Architecture and Bypass Configuration

This bypass station connects between field devices and control modules. It uses a selector switch for local manual override. You can choose between automatic, manual, or bypass positions. Moreover, the station includes two status relays for remote monitoring. These components report the current bypass state to the DCS. Consequently, operators know the loop condition from the control room.

Installation and Operational Guidelines

The ABB Bailey NLBS01 requires 100mA at 24V DC for internal circuits. It switches between control and bypass within 50 milliseconds. You must mount the station on a DIN rail or panel. Always use separate conduit for AC power and signal wiring. This practice prevents interference with the status indicators. Furthermore, the station supports a mechanical lock for security. This feature prevents unauthorized bypass operation.

Physical Characteristics and Environmental Limits

This bypass station has a rugged, powder-coated steel enclosure. Its substantial 1.8 kg weight reflects the heavy-duty switch construction. The layout follows ABB Bailey standard INFI 90 specifications. Therefore, it mounts securely near field junction boxes. The station includes clear labeling for all terminal connections. In addition, it maintains stable operation between -10°C and 55°C ambient temperature. You can store this unit safely between -25°C and 70°C.