Altronic DD-40NTS-O, Руководство по установке

Страница: 7 / 30

-7-
6.2 RPM / HOURMETER - Press the UP and DOWN keys to view the RPM and the hourmeter.
The RPM screen remains until the operator chooses another option. The Hours display will
revert to the status screen after two minutes. In either case, the annunciator will display the
fault number when a shutdown occurs.
6.3 RPM OVERSPEED PROTECTION - The DD-40NTS annunciator has a built in tachometer
to monitor engine overspeed. When the detected RPM is greater than the RPM overspeed
setpoint, the annunciator will trip the fuel and ignition outputs. When this occurs, the unit will
display [70] and activate the “FAULT” indicator. Refer to the Wiring Diagram - Tachometer
Input drawings for the proper hookup.
WARNING: The DD-40NTS annunciator will not recognize the output signal from an Altronic
DTO-3200 or other older overspeed devices (see listing on page 2). These devices will NOT
work for overspeed protection in conjunction with a DD-40NTS annunciator. For such
protection, use the overspeed feature built into the DD-40NTS annunciator.
6.4 BATTERY - The 691200-1 Power Supply contains a special long-life lithium battery. When
the monitored equipment is not operating, current draw form the battery is only microamps
(millionths of amps). When the annunciator is powered, there is no drain from the battery.
This allows for a battery life of up to 5 years in normal operation. The battery in the power
supply is replaceable; use ONLY Altronic part no. 601952. Be sure to observe the proper
polarity as marked in the Power Supply when replacing the battery.
7.0 OUTPUTS
7.1 Two (2) digital outputs SW1 and SW2 are located in the Power Supply. These are rated 400
volts DC, 0.5 amp maximum.
7.2 Output SW1 will trip immediately upon a fault condition or if the STOP key is depressed.
7.3 Outputs SDI and SW2 will trip after a pre-programmed time delay (TIMER PROGM2) from
either a fault condition or if the STOP key is depressed.
7.4 For Power Supply 691200-1, the maximum voltage is 400 volts from a negative ground C.D.
ignition with a current drain of microamps. The maximum current rating is 50 mA when
powered from a DC voltage source of 10 to 30 volts.
8.0 SERIAL COMMUNICATIONS
8.1 Serial communications may be selected as RS-232 or RS-485 using ASCII or Modbus RTU
protocol.
8.2 MASTER/SLAVE OPERATION - The RS-485 communication system in the annunciator is
designed as a master/slave system; that is, each unit responds to its own unique address
(node number) only after it is interrogated by the master (computer). A simple command /
response protocol must be strictly observed.
8.3 NODE NUMBER - The node number is used in the system to identify the desired slave unit
being polled. The node number can be any numeric value from 1 to 99.