RMU-97069B
Revised 07-99
Catalog Section 50
(00-02-0318)
®
FRANK W.
MFR.
Remote Monitoring Unit
RMU16 Model
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Remote Status Inquiry by Telephone or Computer
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Automatic Alarm Dial Out with Built-In Voice
Annunciation to Eight Telephone Numbers
Broad Communications Capability, Built-In Modem and
Datalogger with Real Time Clock
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Uses Any Communication Software or ASCII Terminal
Seven Analog Inputs (8-Bit Resolution) Plus
Speed Input or Additional Analog
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Direct Interface to Digital Annunciator via BCD Port
Class I, Div. 1, Grps. C & D, Explosion-Proof Enclosure
Basic Operation
Standard Features
Description
User Definable Inputs
The RMU16 module allows you to communi-
cate in Data or Voice mode. Both the Data and
Voice modes allow access to your equipment at
any time via standard touch-tone dial tele-
phones or a personal computer.
The RMU16 is a powerful component for remote
equipment monitoring, control and datalogging.
Each of the 4-20 mA analog inputs has program-
mable alarm and control setpoints. The RMU16
will scale to engineering units when the user enters
top of scale and bottom scale values. It accepts a
wide range of inputs in any combination. The
optional frequency input is to measure RPM.
The RMU16 BCD interface is compatible with
Murphy’s digital annunciators, allowing the
RMU16 to monitor 32-48 digital inputs as well.
The RMU16 performs functions such as
remote alarm monitoring and processing, start
and stop via touch-tone telephone or personal
computer, automatic dial out with built-in
voice annunciation, data logging, data acquisi-
tion, and telecommunications.
When operating the RMU16 in Data mode, an
ASCII terminal or computer is used to access
various functions. Commands are entered on
the keyboard, and response messages are dis-
played on the monitor.
The RMU16 features include a real time clock,
built-in modem and password protection. The
unit can be powered by 10-32 VDC systems
and it comes loaded with operating software.
Control Over Standard Phone!
Experience the convenience of inquiry into con-
dition and status from any standard telephone.
Control outputs may be turned on or off via
touch-tone. Analog values and BCD status are
reported in clear digitized speech, allowing the
user to perform control functions and check on
their effects almost instantaneously.
The commands to access the information are
simple 3-letter codes (e.g. INP = input, ALM =
alarm, PHO = telephone), generally followed
by a fourth letter (e.g. R = report, S = set).
The RMU16 includes eight (8) analog inputs
and two (2) relay outputs. Each of the eight (8)
inputs accepts 4-20 mA signals such as
Murphy’s PXMS pressure transducers, RTDT,
RTDTX temperature transmitters (NOTE:
PXMS, RTDT, RTDTX require 24 VDC power
supply). One of the analog inputs can be con-
figured to accept a magnetic pickup input for
speed monitoring.
In Voice mode, the RMU16 can be called to
inquire into conditions and status. When an alarm
condition exists, the RMU16 will automatically
call the telephone numbers pre-programmed.
Data mode allows the user to review I/O, reconfigure
the unit remotely, and download datalogger records.
Works with Any ASCII Terminal.
Applications
There is no need for specialized SCADA® or
MMI® software. The open protocol allows virtu-
ally any communications package to communi-
cate with the unit. The user may simply opt to
run Hyper-Terminal® under Windows® to do con-
figuration, control the unit and perform other
SCADA® functions.
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Voice alarming systems
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Remote monitoring upgrade for panels
containing Murphy Mark III annunciators
The RMU16 accepts BCD inputs, such as
those provided by Murphy’s MARK III digital
annunciator, allowing for remote monitoring
of the annunciator sensor inputs.
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Remote compressor sites
Flood control
The RMU16 also provides two (2) form “C”
relay outputs for ON/OFF control applications.
Pumps and engines
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