Model PD660 & PD661

Low Cost 3-1/2 Digit Loop-powered Meters

The PD660 and PD661 3-1/2 digit loop-powered meters are perfect for applications where a simple inexpensive display is required and no AC power is available. And even if the lighting is poor, the loop-powered backlighting option lets you see the display under any lighting condition. This option gets its power from the 4-20 mA input loop so there is no need for additional wiring and no batteries to ever change. The PD660 and PD661 are housed in rugged NEMA 4X and Explosion-proof enclosures so they can be mounted virtually anywhere.

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Features

PD661 PD660 with backlight option

• 4-20 mA Input
• 3-1/2 Digit Display
• Easy Calibration and Installation
• Loop-powered Backlighting Option
• Low Operating Temperature: -40^o to 85^oC

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Ordering Information

Model:	Description:
PD660-N	NEMA 4X Loop-powered Meter
PD660-B	NEMA 4X Loop-powered Meter with Loop-powered Backlighting
PD661-N	Explosion-proof Loop-powered Meter
PD661-B	Explosion-proof Loop-powered Meter with Loop-powered Backlighting

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Specifications

• INPUT: 4-20 mA
  
• DISPLAY: Sharp, 0.5" high LCD, 3-1/2 digits; 1999, User selectable decimal point.
  
• CALIBRATION: 2 Step; Non-interacting zero and span.
  
• CALIBRATION RANGE: 4 mA input: -500 to +500; 20 mA input: between 20 to 2000 above 4 mA display.
  
• MAXIMUM INPUT CURRENT: 30 mA
  
• MAXIMUM VOLTAGE DROP: 1.5 VDC @ 20 mA; 3.5 VDC @ 20 mA with backlighting option.
  
• ACCURACY: +/-0.1% of span, +/-1 count.
  
• CONNECTIONS: Removable screw terminal block (provided).
  
• OPERATING TEMPERATURE: -40 to 85^oC
  
• PD660 ENCLOSURE: High impact-resistant ABS plastic body, clear ABS plastic cover; NEMA 4X; 1/2" conduit hole provided at base. May be provided on back for panel mounting applications, call factory for details.
  
• PD661 ENCLOSURE: Cast aluminum, approved by FM and CSA; NEMA 4, 7 & 9; Class I, Groups B, C & D and Class II, Groups E, F, & G. Two 1/2" NPT holes provided.

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