Introduction
A customer wants to upgrade the controls on their system without replacing their old magnetostrictive transducers. The older transducer is configured as a single-ended (neuter) Start/Stop or PWM output.
Note: Single ended signals are very susceptible to noise and Delta always recommends using differential signals (RS422 line drivers).
Verification
Tempo I and Tempo II transducers can be configured as neutered outputs. If the part number of a Tempo II transducer ends with the stroke length, it is factory configured as a neutered output. However, the transducers are field upgradeable to add a personality module. The best way to check if a Tempo II transducer has a neutered output is to look inside the transducer head. If two boards are visible in the transducer head, it has a personality module.
Solution
The RMC150 MDT card supports single-ended outputs natively. When wiring single-ended transducers to the RMC MDT module, make sure to follow the wiring diagrams provided in the help. This includes making sure the -RET pin on the RMC is disconnected.
The RMC75E-MA2 module and RMC200-S8 module do not natively support single-ended outputs. A signal converter such as the RPS10 or AMP/10 must be used to convert the single-ended output to an RS-232 output. We recommend placing the converter close to the transducer to take advantage of the noise immunity provided by the differential signals between the RMC and the converter.
Other Resources
Temposonics Legacy Products
Encoder voltage level converter and optical isolator