Installing system bus (SBus) to FSC11B/12B/FIO21B

Max. 64 CAN bus stations can be addressed via system bus (SBus). The SBus supports transmission technology compliant with ISO 11898.

DIP switch S1 or S1:8 lets you add a terminating resistor of 120 ohms (bus termination).

With FSC11B, also the continuing CAN is disconnected via X46:4;:5.

FIO21 does not have a switchable terminating resistor of 120 ohms integrated. The enclosed resistor must be connected for bus termination between X46:4 and X46:5.

FSC11	FSC12	FSC11/12	FSC11	FSC12
S1	S1:8	X46:1;:2	X46:4;:5	X46:4;:5
Off		CAN 1	CAN 1	CAN 1
On		CAN 1 terminated	–	CAN 1 terminated

S2 is reserved on FSC11B and must always be set to "Off".

MOVITRAC^® B with installed option card comes equipped with a connection cable for SBus connection.

MOVITRAC^® B system bus connection

MOVITRAC^® B system bus connection with UFx

MOVITRAC^® B system bus connection with DFx/UOH11B gateways or DFx integrated in MOVITRAC^® B

The permitted total cable length depends on the baud rate setting of the SBus (P884):

125 kBd: 500 m (1640 ft)
250 kBd: 250 m (820 ft)
500 kBd: 100 m (328 ft)
1000 kBd: 25 m (82 ft)

You must use shielded cables.

INFORMATION

Terminating resistor: Switch on the system bus terminating resistor (S1 = ON) at the start and end of the system bus connection. Switch off the terminating resistor on the units in between (S1 = OFF).
Certain units have a permanently integrated terminating resistor that cannot be switched off. This is the case for UFx and DFx/UOH. These gateways form the end of the physical line. Do not connect any external terminating resistors.

Additional information