The TTD product 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. Any input can be locked out by one of the two start-run timers or configured as Class C, ESD or ignore. The annunciator provides for both closing of a fuel valve and grounding of an ignition after a time delay.

Incorporated in the TTD non-volatile memory:

• Run Hours/Elapsed Time Meter (hours roll over at 99,999)
• Last 10 shutdowns with associated run hours
• Last four alarms with associated run hours
• Selectable Modbus RTU server RS232/RS485 serial communications
• Selectable baud rates

Optional Features:

• Pre/Post lube timed functionality
• Tachometer w/ overspeed and underspeed setpoints and running hours
• Lubricator no-flow detection for up to four proximity switches

With the TTD series, the display head is common to all configurations allowing fewer spare parts required to be maintained in the field. Its user-selectable templates provide ease of retrofit by selecting configuration of existing annunciators via display keypad or download from a computer with Windows-based MConfig® installed.

Display Head
The display head shows operational and configuration data. Configuration parameters are entered via keypad or downloaded from MConfig software.

The display head will accept digital inputs directly on the back of the unit. Power is provided to the display head via a direct Phoenix connector. The display head contains the microprocessor, LCD, membrane keys for configuring the sensors inputs and the sensor input terminal blocks.

The TTD LCD annunciates any fault from the sensor inputs, displays engine speed and run hours/elapsed time meter. Other features for the TTD are: built-in test mode function to check the sensor circuits without causing a fault shutdown, pre-lubrication and post-lubrication timers and onboard backup battery to retain the fault display after shutdown on ignition powered units.

Power Supply
The power input and control output terminals are mounted on the plug-in power supply (PSU-2). Power supplies also include an RS485/RS232 serial communication port (MODBUS RTU server) to interface with microcontrollers, PCs, PLCs and/or communication and control systems. The serial communication provides read and write register capability and selectable baud rate up to 38,400.

All PSU-2 power supply models are reverse polarity protected and can be powered by 10-32vdc or 90-400vdc negative ground CD ignition. The TTD annunciator is fully operable with the internal battery. The external DC power enables communications support (MODBUS server) and turns on the display backlight.