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Summary of Contents for LAUREL QLS Series
- Page 1 QLS Quad Output 4-20 mA Current Loop Splitter / Retransmitter With common mode isolation between input & outputs LAUREL Electronics Inc. 3183-G Airway Ave, Costa Mesa, CA, 92626, USA Tel: (714) 434-6131 Fax: (714) 434-3766 Website: www.laurels.com...
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Page 2: Ordering Guide
1. ORDERING GUIDE QLS-1 Quad isolated output loop splitter/ retransmitter, 85-264 Vac power. QLS-2 Quad isolated output loop splitter/ retransmitter, 10-48 Vdc or 12-32 Vac power. 3. PRODUCT DESCRIPTION Model QLS sources up to four (4) independently adjustable 4-20 mA outputs from a single input, which can be 4-20 mA, 1-5V, 0-5V or 0-10V, as selected by jumpers. -
Page 3: Safety Considerations
5. SAFETY CONSIDERATIONS Warning: Use of this unit in a manner other than specified in this manual may impair the pro- tection of the unit and subject the user to a hazard. Do not attempt to operate if the unit shows visible damage. -
Page 4: Jumper Settings
6. JUMPER SETTINGS The four outputs are always 4-20 mA process loops. The signal input can be 4-20 mA, 1-5V, 0-5V or 0-10V, as set by jumpers adjacent to the signal input connector on the circuit board. The factory default input setting is 4-20 mA. - Page 5 Floating loads: Any output load R that is floating (not connected to a local ground or earth ground) can be connected between current output (Pin 1) and current return (Pin 2). Current return is internally tied to signal ground SG, which can be floating or be connected to earth ground.
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Page 6: Setting & Calibration
If a load R is grounded to a local loop ground LG, the available common mode voltage CMV is limited on the positive side by the unit’s internal power supply and on the negative side by the 600 mW power dissipation limit of an output tran- sistor. -
Page 7: Specifications
9. SPECIFICATIONS Mechanical Mounting ..................35 mm DIN rail per EN50 022 Dimensions..........22.5 x 103 x 128 mm (0.9” x 4.1” x 5.0”) W x H x D Weight ........................140 g (5 oz) Connectors .............. Detachable plug-in screw-clamp connectors Wire Size..................28-12 AWG, 2.5 sq. -
Page 8: Limitation Of Warranty
In the event of a defect during the warranty period, the unit should be returned, freight prepaid (and all duties and taxes) by the Buyer, to the authorized Laurel distributor where the unit was purchased. The distributor, at its option, will repair or replace the defective unit. The unit will be returned to the buyer with freight charges prepaid by the distributor.
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