West Control Solutions MRC 5000 Controller Manual - Manual (Page 5)

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Section 1 Overview
This instrument records process trend lines, one or two pens, on a 10 inch circular chart. As an option, up to two alarm points
are provided for each of the two pens.
This recorder will accept J, K, T, R, and S Thermocouples and RTD inputs, as well as typical Millivolt, Milliamp (4-20mA) and
Volt inputs, (up to 5 volts).
1.1 DISPLAY
Process values for each pen can be displayed on the .56" LED display, or the display can be blanked. In the latter case, the
display is used only for programming and setting alarm points.
1.2 CONTROL
The instrument can be provided with relay control outputs which can be programmed for on-off control capability.
1.3 ALARMS
Two optional alarm output relays, with SPDT contacts, are available for each pen. Each alarm is also configurable as a
latching, limit device. In this case, a manual reset button is required and included when the High/Low Limit option is ordered.
1.4 DIGITAL COMMUNICATIONS
An optional, RS-485 digital communications port is available that utilizes the standard MODBUS RTU protocol.
1.5 POWER INPUT
The standard recorder will operate on input power over the range of 90-264 VAC, 50-60 Hz, without any modifications. A low
power voltage option (20-50 VAC or 22-65 VDC) is also available. All Low Voltage option recorders are clearly identified as
such by a label near the power wiring terminal block.