ABB Bailey NTFB01 Fieldbus Module Termination Unit

The ABB Bailey NTFB01 serves as a dedicated termination unit for fieldbus communication networks. This component ensures proper signal reflection control inside your distributed control system. It connects directly to the fieldbus module without any active electronics. Consequently, the NTFB01 introduces no signal delays or power consumption.

Mechanical and Physical Specifications

Parameter	Specification
Model	NTFB01
Category	Fieldbus Module Termination Unit
**Height	130 mm
Width	45 mm
Depth	105 mm
Weight	0.3 kg (0.66 lbs)
Primary Interfaces	1 x DB9 female, 1 x screw terminal block
Mounting Points	2 x slotted holes (4 mm diameter each)
PCB Components	1 resistor network, 1 termination switch
Energy Storage	None (zero capacitance or battery)

Detailed Technical Description

The ABB Bailey NTFB01 weighs only 0.3 kilograms for easy handling. Its 130mm height fits standard Bailey cabinet racks without modification. The 45mm width allows adjacent placement with other termination units. This device measures 105mm in depth, leaving ample space for cable bending.

We designed the NTFB01 with two physical interfaces. A DB9 female connector accepts standard fieldbus cables. Additionally, a screw terminal block supports direct wire connections. The unit includes one passive resistor network for line termination. A single mechanical switch enables or disables the termination resistor. Therefore, you can configure this unit for network ends or middle nodes.

The NTFB01 stores no electrical energy internally. It contains no capacitors or batteries. Hence, the unit presents no explosion risk in hazardous areas. You will never need to discharge or replace any power storage component. This passive design eliminates all maintenance related to energy storage.

Install this termination unit near the fieldbus module for optimal performance. Always set the termination switch to “ON” at both network ends. Turn the switch to “OFF” for all intermediate devices. Verify the cable polarity matches the terminal block markings. This practice prevents data reflection and communication errors.

The NTFB01 operates without external power supply. It draws zero current from the fieldbus network. Consequently, it generates no heat and requires no cooling. You can place this unit inside sealed cabinets without thermal concerns. Its robust construction supports industrial temperatures from -20°C to +70°C.