No Batteries, Nonvolatile Memory
Nonvolatile EEROM memory retains information indefinitely after power loss or machine shutdown, eliminating batteries and related hazards.
Replacing Electromechanical Selsyn Systems
In new installations, the M I 890-R together with AVG Automation's brushless resolver series RL100 is a 100% solid-state replacement for electromechanical Selsyn systems. In existing Selsyn installations, the model M1890-S can be used.
PC-Handshake for PLC Synchronization
On an external command, such as data transfer command from a PLC, the digital shaft-angle position can be "frozen" at the input of the PC in order to ensure that the data is not sampled during transition from one angle to the next, and that the PLC always reads a valid data.
Reliable Under Extreme Environments
The PPT combines the ruggedness of a brushless resolver and reliability of a solid-state control. The resolver can be mounted on a machine shaft in any hostile environments such as mechanical shock, vibrations, extreme humidity and temperature changes, oil mists, coolants, solvents, etc., and the programmable unit M1890 can be mounted up to 2500 ft (762 in) away in control panel. The splash-proof, oil-tight front plate of the M1890 unit guarantees perfect operation even in unfavorable conditions like steel mills. The
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converter assures high-tracking speed (1800 RPM) and high-noise immunity. The power-interruption relay with I Form C contact can be used for remote indication, alarm or trip. The operation mode (single- or multi-turn) and resolution (8-, 10-, or 12-bit) can be selected from the front panel "Select Function Switch."
Add Limit Settings Externally
A parallel BCD output for AVG Automation's 18 5 5 bus is provided, which permits setting of limits or trip points externally using 1855 series limit modules as shown in the accompanying diagram.
Options
The following optional features provide additional versatility to the unit:
- Serial link Options (RS-232C, RS-422A or others) for remote display, remote command panel, or computer interface are available.
- Additional parallel port in either BCD, or BINARY, or GRAY Code format with choice of sourcing, sinking or the
TTL-type outputs.
Remote Display, 1890-D
This unit connects to the master 1890-R/1890-S unit via RS-422A or RS-232C serial port to provide remote indications if needed. |
