MTS Systems Series TBF-R User Manual download pdf (Page 26)

3.3.4 Control Lines And Signal Lines Between Master Control Unit And

Amplifier

For the definition of the speed reference, the master control unit normally provides an

output of a digital/analogue converter. This output signal normally is measured against

ground or against reference voltage. The input at the amplifier is a differential input with set

value+ at 4d and set value- at 4b. The lines at these inputs have to be run to the control unit

in the same cable. This cable has to be shielded, with connection of the shield to the servo

amplifier and the control unit. Input+ of the TBF-R is connected to the set value output of the

master control unit. Input- of the TBF-R is connected to the reference point for the set value

output at the master control unit.

The lines Iext., Int.off, Ready output, Enable and Pos.Stop/Neg.Stop, if used, have to be

wired in a shielded cable as well. These lines are measured against ground, that means

the connection requested in 0. between TBF and master control unit is sufficient.

3.3.5 The Simulated Incremental Encoder Signals

The connection cable for the incremental encoder signals has to be shielded. The pairs

track A+/track A-, track B+/track B- and track I+/track I- have to be twisted, the shorter the

twist the better the interference immunity. Each pair is shielded separately within the total

shield (see 0). The shield has to be connected on amplifier side and control unit side.

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MTS Systems Series TBF-R User Manual Page 26