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Precision Digital

PDS178 Watchdog Scanner Temperature & Process System

Combination of the Trident meter, the Minimux II scanner, and the PDA2821 NEMA 4X enclosure, automatically switches between up to eight input signals

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$1,080.00CAD
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PDS178 Watchdog Scanner Temperature Process System 00794 dm1746721335
PDS178 Left X2

The PDS178 Watchdog Temperature Scanning & Alarming System brings together a popular combination of Precision Digital products: the Trident meter, the Minimux II scanner, and the PDA2821 NEMA 4X enclosure. The scanner automatically switches between up to eight (8) input signals (4-20 ma, ±10 V, TC, or RTD) and sends them to the Trident meter for display. Signal switching is done via DPST reed relays. The Watchdog can be used in a variety of temperature and process monitoring applications. A very common application for this system is to monitor bearing temperatures. The Trident meter included with this system is available with standard 0.56" (14.2 mm) high LED digits or large 1.2" (30.5 mm) high LEDs.

Trident Temperature & Process Meter
• 4-20 ma, ±10 V, TC & RTD Inputs
• 4-Digit Red LEF Display
• Two Relays for Alarm Signal to PD138
• NEMA 4X, IP65 Front
• Sunlight Readable Display

Minimux II Temperature/Process Scanner
• 8 Inputs per Unit
• Thermocouples, RTDs, and Process inputs
• Adjustable Dwell Time for Each Channel
• Independent Alarm Input for Each Channel
• First-Out Alarm Indication
• Alarms Indicated by LEDs, Built-in Horn, and Relay
• Built-in 85 dB Horn with Silence Pushbutton
• Stop-on-Alarmed Channel (Field Select)
• Sunlight Readable Indication
• NEMA 4X/IP65 Front

Plastic NEMA 4X Enclosure
• NEMA 1, 4, 4X, 6, 12, and 13, IP66
• Wall Mountable

RecalibrationAll inputs are calibrated at the factory; recalibration is recommended at least every 12 months.
Max/Min DisplayStored until reset by user or meter is turned off.
PasswordRestricts modification of programmed settings
Weight 9.5 oz (269 g) (including options)
Enclosure1/8 DIN, high impact plastic, 94V-0, color; gray
ColourGrey
DisplayTrident: 0.56” (14.2 mm) red LED, 4 digits (-1999 to 9999)
Trident X2: 1.20” (30.5 mm) red LED, 4 digits (-1999 to 9999)
No. Of Channels8 double-pole channels per unit
No. Of Channels Per SystemUnlimited
Signals SwitchingDPST reed relays
Contact Resistance0.2 Ω maximum
Maximum Input Voltage200 V (switched or common mode)
Maximum Current Switched0.5 A
Maximum Power Switched10 W
Dwell TimeEach channel adjustable from 0.6 to 30 seconds
Non-Volatile MemoryAll programming values are stored in non-volatile memory for ten years if power is lost
Scan MethodInternal or manually controlled
Channel IndicationGreen LED on front panel
Disabling ChannelsAny channel may be disabled during setup
Scan StopThe scan may be stopped by pressing and holding the STOP/GO button for more than 0.5 seconds. The scan may be resumed by pressing and releasing the STOP/GO button quickly (less than 0.5 seconds)
Alarm InputIndependent alarm input for each channel. Input Impedance; 25 K Ω, typical pull-up to 5 V
Alarm SequenceSequence A or Sequence F2A (first out)
Non-Volatile MemorySettings stored for a minimum of 10 years.
Power Options85-265 VAC, 50/60 Hz; 90-265 VDC, 20 W max or 12-36 VDC; 12-24 VAC, 6 W max.
Required FuseUL Recognized, 5 A max, slow-blow; up to 6 meters may share one fuse.
Normal Mode Rejection64 dB at 50/60 Hz
Isolation4 kV input/output-to-power line; 500 V input-to-output or output-to-24 VDC supplies.
-6R5 & -6X5 models only: 100 V output-to-24 VDC supply
Warranty3 years parts & labor
Warranty3 years parts & labor
Alarm OutputsAlarm condition indicated by:
1. Front panel red LED for each channel
2. Relay, 1 SPDT (form C); rated 2 Amp @ 30 VDC or 2 Amp 2. @ 250 VAC resistive load; 1/14 HP @ 125 / 250 VAC for inductive loads. For fail-safe operation, the relay is energized in the non-alarm state. In the case of a power failure, the relay will go to the alarm state, (NC contact is connected to common)
3. Built-in Horn, 85 dB
4. Stop-on-alarmed-channel (user select)
Alarm AcknowledgeFront panel ACK and rear connector terminals
External Switch FunctionsThe functions of the front panel buttons are available at screw terminals at the rear of the instrument
Message LabelsFree, custom printed, 2 lines per message at 14 characters per line. Factory or field printable. See manual for details
ConnectionsPower & Signal: removable screw terminal blocks accept 12 to 22 AWG.
Serial: RJ11 header, standard on all meters.
Operating Temperature-40°C to 65°C
Storage Temperature-40°C to 85°C
Relative Humidity0 to 95% non-condensing
Power Options115 VAC, ± 10%, 50/60 Hz, 4 VA; 230 VAC, ± 10%, 50/60 Hz, 4 VA; 12-24 VDC (9-18 VAC, 50/60 Hz) 2 W
Led TestAll LEDs are tested on power-up
Enclosure1/8 DIN, high impact plastic, UL94V-0
Front PanelNEMA 4X, panel gasket provided
Warranty3 years parts & labor
Display IntensityEight user selectable intensity levels
Front PanelNEMA 4X, IP65; panel gasket provided
Programming MethodsFour front panel buttons, cloning with Copy feature, PC with MeterView or LabVIEW software, and Modbus registers. Certified LabVIEW driver available.
Noise FilterProgrammable 2 to 199 (0 will disable filter)
Display Update RateProcess/RTD: 3.7-5/sec; TC: 1.8-2.5/sec
Over RangeDisplay flashes 9999
Under RangeDisplay flashes -1999
  • Thumbnail of document Data Sheet - PDS178 Watchdog Scanner Temperature & Process System
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    Data Sheet - PDS178 Watchdog Scanner Temperature & Process System

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  • Thumbnail of document Data Sheet - PDS178 Watchdog Scanner Temperature & Process System
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    Data Sheet - PDS178 Watchdog Scanner Temperature & Process System

    Download
  • Thumbnail of document Data Sheet - PDS178 Watchdog Scanner Temperature & Process System
    Download

    Data Sheet - PDS178 Watchdog Scanner Temperature & Process System

    Download
  • Thumbnail of document Data Sheet - PDS178 Watchdog Scanner Temperature & Process System
    Download

    Data Sheet - PDS178 Watchdog Scanner Temperature & Process System

    Download

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