The 8-channel Ex junction box
JRBS-40SC-8C/EX is designed for fieldbus
systems according to IEC 61158-2, i.e. it is
suited for both FOUNDATION™ fieldbus as
well as PROFIBUS-PA.
The junction box is equipped with an adjustable short-circuit current limiter. As maximum current limit, the following values can be
selected together for all channels via a rotary
coding switch: 30, 35, 45 and 60 mA.
The housing is made of powder-coated aluminium and is IP20 rated.
The junction box is equipped with an activatable terminating resistor for the bus. The
switch is integrated in the housing on the
board.

Shielding and housing can be conected directly via a second switch which is also located on
the board.
Note: It must be ensured that there is sufficient equipotential bonding in the system. The
device is connected to the equipotential bonding via the housing's M5 x 1 grounding bold.
Accessories: To increase the degree of protection, there are various aluminium and stainless steel housings with IP6x rating and various cable glands available on request.

■ Junction box for DIN rail mounting
■ Short-circuit protection per drop line/spur
■ Switch-in terminating resistor
■ Cable shielding: Capacitive or direct connection with housing potential selectable
via switch
■ aluminium housing
■ Entity and FISCO compliant according to
IEC 60079-11