The Allen-Bradley 1788-FBJB6 junction box is a junction box designed for providing connections with Foundation Fieldbus networks. The 1788-FBJB6 junction box can connect a maximum of 6 field devices and it features 1 trunk input connector and 1 trunk output connector. The connection or disconnection of communication cables to the 1788-FBJB6 junction box with the power applied can cause electrical arcing which could lead to an explosion in hazardous locations. Therefore, the power to the module should be shut off when communication cables are being connected or disconnected. The 1788-FBJB6 junction box is sensitive to electrostatic discharge. All the precautions to prevent electrostatic discharge should be followed to ensure equipment safety and normal operation.

The 1788-FBJB6 junction box is designed for use in a Pollution Degree 2 rated industrial environment. It is not designed for use in residential environments. Because the 1788-FBJB6 junction box is an open-type of junction box, it should be mounted inside a suitable enclosure. The input power requirements for the 1788-FBJB6 junction box are 12 to 32 Volts DC voltage and 0.5 Amps of current. The output of the trunk is 0.48 Amps and 12 to 32 Volts DC. The drop output is 40 milliamps and 12 to 32 Volts DC. No isolation is provided between the communications channels. The recommended torque for the device terminals is 0.5 to 0.6 N-m. A copper cable rated for 82 degrees Celsius and with a 0.205 to 0.823 mm2 cross-sectional area is recommended for Foundation Fieldbus and DC power connections. The operating and non-operating shock ratings for the 1788-FBJB6 junction box are 15G  and 30 G, respectively.  The 1788-FBJB6 junction box can sustain 0.5 G of vibration at 10 to 500 Hertz.