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Description
The 1900/65A General Purpose Equipment Monitor is
designed to continuously monitor and protect equipment that
is used in a variety of applications and industries. The
monitor’s low cost makes it an ideal solution for general
purpose machines and processes that can benefit from
continuous monitoring and protection.
Inputs
The 1900/65A provides four transducer inputs and four
temperature inputs. Software can configure each transducer
input to support 2- and 3-wire accelerometers, velocity
sensors or proximity sensors. Each temperature input supports
Type E, J, K, and T thermocouples, and 2- or 3-wire RTDs.

Outputs
The 1900/65A provides six relay outputs, four 4-20 mA
recorder outputs, and a dedicated buffered output. The user
can use the 1900 Configuration software to configure the relay
contacts to open or close according to the OK, Alert and
Danger statuses of any channel or combination of channels,
and to provide data from any variable from any channel on any
recorder output. The dedicated buffer output can provide the
signal for each transducer input.
A Modbus Gateway option allows the monitor to provide
static variables, statuses, event list, time and date information
directly to any Modbus client, including Distributed Control
Systems (DCSs), Supervisory Control and Data Acquisition
(SCADA) systems, Programmable Logic Controllers (PLCs), or
System 1 software. The monitor uses an internal counter and a
Modbus client/master time reference to generate time and
date information. Users can upgrade monitors without the
Modbus Gateway by ordering the 1900/01 Communications
Upgrade (see the Ordering Information section). The 1900/65A

supports Modbus communications via Ethernet
and a software-configurable RS232/485 serial
port.
Configuration
The user defines monitor operation and the
Modbus Gateway register map by using
software running on a laptop or PC to create a
configuration file and download the file to the
monitor through the built-in Ethernet
connection. The 1900/65A permanently stores
configuration information in non-volatile
memory, and can upload this information to the
PC for changes.
Display Module
The 1900/65A supports an optional
display/keypad to view channel information or
make minor configuration changes. This allows
the 1900/65A to operate as a stand-alone
package. If desired, the user can mount the
display up to 75 metres (250 feet) from the
Monitor Module