TTDJ-99062N page 1 of 8
TTDJ Series Fully-Configurable Fault Annunciator
Installation and Operations Manual
TTDJ-99062N
Revised 04-04
Section 50
(00-02-0412)
Description
The TTDJ is a solid-state fault annunciator and shutdown control system,
with hour meter, designed to protect engines, compressors and their associ-
ated equipment. Four TTDJ modules are available:
TTDJ-DC : Powered by 12 or 24 VDC systems without tachome-
ter and overspeed sensing. Includes RS485 serial port.
TTDJ-DC-T : Powered by 12 or 24 VDC systems with internal
tachometer and overspeed sensing. Includes RS485 serial port.
TTDJ-IGN : Powered by negative ground CD ignition systems
without tachometer and overspeed sensing. Without RS485 port.
TTDJ-IGN-T : Powered by negative ground CD ignition systems
with internal tachometer/overspeed sensing.Without RS485 port.
All TTDJ models will accept 32 sensor inputs from normally open and/or
normally closed sensors. Each of the first 16 inputs can be configured for
Shutdown or Alarm Before Shutdown
*
, and can be locked out by one of
the Two Start-Run timers (B1:0-5 min.; B2:0-9:59 min.), or configured as
Class C. The annunciator provides for both closing of a fuel valve, and
grounding of an ignition after a time delay. The TTDJ has built-in Elapsed
Time Meter. Run Hours and Tachometer Settings are stored in non-
volatile memory, as well as the last 4 shutdowns and one alarm (alarm
only stored if active at the time of shutdown). The TTDJ liquid crystal
display annunciates any fault from the sensor inputs, displays engine
speed and elapsed time.
Other features for all TTDJ models are: built-in Test Mode to test the sensor
circuits without shutting down, on-board backup battery to retain the fault
display after shutdown (IGN models only), and a history of the last 4 shut-
downs with their associated Run Hours, also stored in non-volatile memory.
TTDJ-DC and TTDJ-DC-T models feature an RS485 serial communications
port (MODBUS RTU slave) to interface with micro-controllers, PC’S,
PLC’s and controllers.
Module/ Head
The module is the brain of the control system. It contains the microcom-
puter, the Liquid Crystal Display (LCD), the membrane keys for configur-
ing the sensors inputs, the Sensor Inputs Terminal Blocks and the Power
Inputs and Control Output Terminal Block. The TTDJ-DC module also
includes an RS485 serial communications port (MODBUS RTU slave).
Liquid Crystal Display
The Liquid Crystal Display sequentially provides shutdown/alarm
condition, run hours, rpm, and timer information. A shutdown or
alarm condition is indicated by the appropriate sensor number in
the first two leftmost digits. Hours display uses all the digits. RPM
display is shown in the rightmost digits with a Run Indicator in the first
digit. The Timer display shows the timer number in the first digit and the
time in the last three digits.
Timers
Active Timers are indicated by the timer number in the first digit of the dis-
play, and the remaining time in the last three digits. Timer 1= Class “B1”,
Timer 2= Class “B2”, Timer 3= Test, Timer 4= Ignition Ground Delay.
Power and Control Inputs/Outputs
The TTDJ power and control inputs and outputs are connected to the
Power Inputs terminal block on the back of the TTDJ.
In the TTDJ-IGN and TTDJ-IGN-T the FV+ output is a non-switched out-
put that supplies stored energy from an internal capacitor. -FV and
ALARM outputs are non reversible switched outputs (switched OFF for
normal operation, switched ON for alarm and shutdown). When a shut-
down fault is detected, the -FV and ALARM turn ON and after a time
delay, the IGN input switches to ground. The alarm output does not
operate for Manual Stop (code 52).
On the TTDJ-DC and TTDJ-DC-T the IGN, FV, and ALARM outputs
are programmed to switch ON for normal operation.
Sensor Inputs and Terminals
Up to 32 dry contact sensor inputs or Murphy device transistor outputs
can be connected to the back of the TTDJ via a terminal block (32 pair,
screw type, each with a jumper). Sensor inputs 1 to 16 are configurable as
Class“A”, Class “B1”, Class “B2” or Class “C” functions, Shutdown or
Alarm Before Shutdown
*
. The Class“B” timers allow sensor inputs to be
locked out at start-up. Sensor inputs configured for Alarm Only will cause
the Alarm Output to turn on when tripped, and the sensor number will be
annunciated while the unit continues to run. TTDJ sensor inputs 17-28 are
dedicated as Class “A” Shutdown only. Sensor input 29 can be configured as a
Class “A”, or Class “ESD” input. Sensor input 32 is dedicated as Class “ESD”.
Sensor inputs 30 & 31 can have special functions or be Class “A”. Any
tripped sensor is detected within 1 second after faulted.
Please read the following information before installing
.
This installation information is intended for all TTDJ Series models.
A visual inspection of this product before installation for any damage during shipping is recommended.
GENERAL INFORMATION
WARNING
BEFORE BEGINNING INSTALLATION OF THIS MURPHY PRODUCT
✔
Disconnect all electrical power to the machine.
✔
Make sure the machine cannot operate during installation.
✔
Follow all safety warnings of the machine manufacturer.
✔
Read and follow all installation instructions.
CSA Certified for Use in Class I, Div. 2,
Groups C and D Hazardous Areas.
US Patent 6,144,116
(model TTDJ-IGN-T only)
C US
*
Alarm Before Shutdown is a function that causes annunciation and the alarm output, but will not cause a shutdown.
