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Compressor Controls & Annunciators



FW Murphy has you covered, whatever level of control you need for your engines or motor driven pumps and compressors. You can find a controller with the perfect mix of features, such as comprehensive signal monitoring and control, J1939 communications, fault annunciation, custom programming, expandability, and hazardous location ratings. Creative solutions from basic shutdown to total control.



 

Vapor Recovery Unit Controller

 

The VRU Pro is dedicated to controlling your system and designed specifically for vapor recovery applications. This Class I, Div. 2 hazardous area rated unit gives you the peace of mind required for your hazardous natural gas applications.

•   Full featured Vapor Recovery Unit controller
•   Comprehensive signal monitoring and control:
      › Auto-Start
      › Speed/Recycle/Capacity control through 3-way PID monitoring of Suction/Discharge/Driver Load
•   Fit for purpose, fixed I/O
•   Engine/Motor feature selectable
•   CAN J1939 engine communications
•   Setup configurable through keypad
•   C1D2 Hazardous area rated; standard


Click here to see product specifications and current literature.

 

 

TTD Series Fault Annunciator

 

The TTD Series is a solid-state fault annunciator and shut-down control system designed to protect engines, pumps, compressors and associated equipment. The TTD model accepts 48 sensor inputs from normally open and/or normally closed sensors. Each of the 48 inputs can be configured for shutdown or alarm only. The annunciator provides for both closing of a fuel valve and grounding of an ignition after a time delay, annunciates any fault from the sensor inputs, and displays engine speed and run hours/elapsed time meter.

•   Fully-configurable fault annunciator
•   Alarm and shutdown control system for engine-driven pumps and compressors
•   Built-in test mode function to check the sensor circuits without causing a fault shutdown
•   Pre-lubrication and post-lubrication timers
•   Intuitive display icons to display status and assist in setup and operation
•   Onboard backup battery to retain the fault display after shutdown on ignition powered units


Click here to see product specifications and current literature.

 

 

Centurion™ C4

 

The Centurion Configurable Controller is a control and monitoring system, primarily designed for engine/electric motor driven compressors.

The Centurion continuously monitors input signals and set points and commands outputs to maintain proper operation. When an out-of-limits event occurs, the controller will stop, shut-down or control equipment to change conditions. The auto-start capabilities of the Centurion allow for start/stop based on parameters such as pressure set points or by digital signals.

The Centurion provides real-time data via communication ports to a connected display and/or supervisory system. This advanced system offers multiple options for remote communications and operation including HMIs, PLCs, PCs and SCADA systems. The industry standard MODBUS RTU protocol means greater support for a wide variety of communication equipment including radio and satellite communications systems.

•   Fully-configurable control and monitoring system
•   Applications include reciprocating/screw compressors and pump systems
•   Expandable system to meet most three-stage compressor applications
•   Local & remote communications, MODBUS RTU via RS485/232
•   Shut-down history and event history lists
•   No programming experience required


Click here to see product specifications and current literature.

 

 

Centurion PLUS™

 

The Centurion PLUS™ Controller is a custom programmable control and monitoring system. Primarily designed for engine driven compressors, this system is well suited for many control applications such as CNG control, Fire Pump Control, and many industrial control applications.

The Centurion PLUS™ continuously monitors input signals and set points and commands outputs to maintain proper operation. When an out-of-limits event occurs, the controller will stop, shutdown, or control equipment to change conditions. The Auto-Start capabilities allow for start/ stop based on parameters such as pressure set points or by digital signals.

This advanced system offers multiple options for remote communications and operation including HMI’s, PLC’s, PC’s, and SCADA systems. The industry standard Modbus® RTU protocol means greater support for a wide variety of communication equipment including radio and satellite communications systems.

•   Custom programmed to meet exact application requirements
•   Communications via two (2) RS485/RS232 ports
•   Shutdown and Alarm History, Maintenance Timers
•   Expand I/O up to three (3) expansion modules
•   Complex valve logic and sequencing support
•   Expanded calculation abilities


Click here to see product specifications and current literature.

 

 

MX Series

 

The MX4 expansion module provides temperature and frequency input capability to existing and future Murphy Controllers using CANBUS proprietary communications. Modbus® RTU RS485/RS232 is also provided. The MX4 module adds up to 18 thermocouples and 1 mpu.

The MX5 expansion module provides input/output capability using CANBUS, and permits up to 24 digital inputs, 8 digital outputs, 10 analog inputs, and 1 mpu. The MX5-A adds an additional 4 analog outputs to the base MX5. The MX5-D adds an additional 8 digital outputs to the base MX5.

Any combination of MX-Series modules can be added to enable digital and analog I/O, and thermocouple inputs for communication and monitoring by the master controller.

•   Dedicated I/O expansion modules
•   Slave communications via CANBUS with Centurion PLUS™ controller
•   Type "J or K" thermocouples
•   Din mounting case
•   B+ or B- digital inputs; low-voltage digital outputs
•   End-of-line analog inputs


Click here to see product specifications and current literature.

 

 

LCDT

 

The LCDT Selectronic® Tattletale® system is a compact fault annunciator with an electronic alarm/shutdown control system. It’s designed to protect engine-driven or motor-driven compressors and pumps. The annunciator indicates the sensor, and hence the parameter, that causes an alarm or shutdown.

At the heart of the system, the basic annunciator component has two variations: the Model LCDT-NO, which accommodates normally open sensors; and the Model LCDT-NC, which accommodates normally closed sensors. These models are intended for use with all Swichgage® instruments without the OS option.

A separate power supply is provided with the model LCDT instrument. Power may be supplied by CD ignition, a 120 VAC line, or by 12 or 24 VDC battery.

•   System alarm or shutdown for up to 47 NO or 47 NC sensors
•   Timed start-up override for up to 15 sensors
•   Liquid Crystal Display of tripped sensors and the lockout timer countdown
•   Explosion-proof power supply
•   Battery power to maintain electronics while engine is not running
•   Rated for hazardous locations


Click here to see product specifications and current literature.

 

 

S1501

 

The S1501 instrument is a microprocessor-based alarm, shutdown and control system with tachometer/hourmeter functions. It annunciates in alphanumeric characters the protective device that has signaled an alarm or caused equipment shutdown.

The Murphy S1501 system has seven SPDT relays, and can be configured to monitor applications such as air and natural gas compressors, natural gas refueling and other industrial operations. CSA certified or NRTL approved for use in Class I, Div. 1 Grps. C & D hazardous locations.

•   Alarm/Shutdown for 32 or 64 N.O. or N.C. sensors
•   Field adjustable sensor nomenclature
•   Selectable sensor lockouts Class A, B, C or P
•   Built-In tachometer/overspeed function
•   RS232 or RS485 Modbus RTU communications
•   Two start/run timers and elapsed time meter


Click here to see product specifications and current literature.