Control Solutions Knowledgebase

Babel Buster BB2-7010 and BB2-6010 Line Termination

Termination and Bias jumpers for RS485 (Modbus RTU) on Control Solutions, Inc. Babel Buster BB2-7010 (or BB2-6010)

WARNING: Opening any electronic device for any reason including positioning of jumpers can cause damage or destruction of the device if proper ESD handling procedures are not followed! Refer to article on ESD Protective Measures regarding proper handling.

WARNING: Always remove power from device before opening it! This is for the protection of the device. You will not be harmed by the low voltage present, but you may cause damage or destruction of the device by opening it with power connected.

Note: Termination should only be applied at ends of RS485 link. Line bias, if used, should only be applied one place on the link.

The shunts (or jumpers) are labeled ‘Master’ and ‘Slave’ for line bias. Line bias is ‘on’ in the Master position. Typically line bias will be applied at the Master and nowhere else on the network. The shunt for termination has a white outline in the ‘on’ position. Termination should be ‘on’ at both ends, but only the ends, of the network.

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