Industrologic, Inc. reserves the right to change any product's features, specifications, documentation, warranties, fee schedules, and conditions at any time and without notice.
Industrologic products are provided as printed circuit board level assemblies. Some Industrologic products may include mechanical packaging assessories which are provide for the purchaser's convenience, and are not intended to be final assembly enclosures.
Industrologic products are provided with the understanding that the purchaser will determine fitness for any particular application as well as achieve compliance with any particular specifications or regulations as required or desired for that application.
Industrologic's obligation under this Warranty is limited to replacement with a new or repaired unit to the original purchaser. The unit must be returned, and replacements obtained from Industrologic, Inc. or the Distributor or OEM from whom it was purchased.
This warranty will not apply if, in the judgment of Industrologic, Inc., damage or failure of the product has resulted from accident, alteration, misuse, abuse, connection to or operation with incompatible signals or power sources, or improper installation.
Under no circumstances shall Industrologic, Inc. be liable to purchaser or any third party for any loss of profits or other direct or indirect costs, expenses, losses, or consequential damages arising out of or as a result of any defects in or failure of Industrologic products or any part or parts thereof.
THIS WARRANTY IS IN LIEU OF ANY OTHER WARRANTY, EITHER EXPRESSED OR IMPLIED, AS TO DESCRIPTION, QUALITY, MERCHANTABILITY, FITNESS FOR ANY PARTICULAR PURPOSE OR USE, OR ANY OTHER MATTER.
Products must be returned by original purchaser with a Return Materials Authorization (RMA) number issued by Industrologic, Inc. or the Distributor or OEM from whom it was purchased, authorizing its return. Current repair or replacement fees and procedures will be related during the issue of the RMA number.
Warranty or repair units must be returned with postage and insurance paid by purchaser. Industrologic, Inc. is not responsible for damages or loss during shipment.
Operating environment-
Temperature: 0-50 degrees Celsius (32-122 Fahrenheit)
Humidity: 30 to 80 percent, non-condensing
Digital trigger input-
Optoisolator input, LED and diode voltage drops of 1.2 and 0.6 volts respectively
Minimum current required: 2 mA
Both positive and negative connections isolated from ground to allow current source or sink
Current limiting series resistor to allowing direct connection to switched voltage or LED circuit.
Relay Contacts-
Maximum voltage: 30 volts, AC or DC
Maximum current: 1 amp
Manufacturer's type: Omron G5V-1-DC5 series or equivalent
The standard UWDTPC trigger timing is set to approximately 5 1/2 minutes, and the relay on time is approximately 1 second, both with a tolerance of +/- 20%. OEM customers may specify other timing ranges.
If the trigger signal is a high-going +24 volt output (switched 24 volts typical of PLC outputs), the output will be connected to the positive trigger input (TR+) and the negative trigger input (TR-) will be connected to ground. The on-board optoisolator current limiting resistor allows direct connection to 12 or 24 volt circuits.)
The UWDTIE can also monitor a digital output signal or a signal used to drive an LED, such as a PC hard disk drive "activity" LED. (This type of connection will require a custom value for the optoisolator current limiting resistor, typically 220 ohms.)
If the trigger signal is a hard disk activity LED from a single board PC, the connections normally made to the LED can be connected directly to the HDLED header, observing the polarity (plus and minus connections).
For a microcontroller or single board computer with a 5 volt power supply, a digital output can be used to trigger the UWDTIE in either of the two following ways. The output must be capable of sourcing or sinking 17mA if a 220 ohm optoisolator current limiting resistor is installed. 1. If the trigger signal is an active low digital output, it should be connected to the TR- and +5 volts connected to TR+. 2. If the trigger signal is an active high digital output, it should be connected to the TR- and +5 volts connected to TR+.
When the device driving the watchdog timer is ready to begin using the circuit, the device will begin sending trigger signals, after which the trigger circuit will activate, turning on the relay and relay LED.
From that point on, the trigger signal must continue to occur at an interval more frequent than the trigger time, or the trigger circuit will time out and the relay will turn off.
If the UWDTIE is used with an E-Stop circuit in fail-safe mode, the E-Stop loop will normally be connected to the relay common (COM) and normally open (NO) terminals. This will hold the E-Stop circuit in an activated mode, and will require that the system be able to start with the E-Stop circuit activated.
end of manual