Specifications

No Batteries,
Nonvolatile Memory
Nonvolatile EEROM mem-
ory retains information
indefinitely after power loss
or machine shutdown,
eliminating batteries and
related hazards.
Replacing
Electromechanical
Selsyn Systems
In new installations, the
M1890-R together with
AVG Automation's brush-
less resolver series RL100 is
a 100% solid-state replace-
ment 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 com-
mand from a PLC, the digi-
tal shaft-angle position can be "frozen" at the input of the PC
in order to ensure that the data is not sampled during transi-
tion 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 tempera-
ture changes, oil mists, coolants, solvents, etc., and the pro-
grammable unit M1890 can be mounted up to 2500 ft (762
m) 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 ratiometric con-
verter assures high-tracking speed (1800 RPM) and high-noise
immunity. The power-interruption relay with 1 Form C con-
tact 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 1855 bus is
provided, which permits setting of limits or trip points exter-
nally using 1855 series limit modules as shown in the accom-
panying 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 inter-
face 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.
A-39
800-TEC-ENGR
www.avg.net
Position Transducers/Sensors
SECTION
A