Digital Liftsentry allows to measure and control the load on elevators and goods lifts.
Digital Liftsentry is easy to install, reliable and with its good price is fit for installation on new and modernized elevators.
Digital Liftsentry measures the load in the cabin by measuring car and beam flexion strain proportional to the load in the cabin.
Electronics mod. 699 is connected to a transducer: mod. 942 transducer for cars and beams or mod. LT load cell for weighing below car.
Electronics mod. 699 and controls the load by means of its alarm levels with relays outputs.
Digital Liftsentry can be installed on traction elevators, on good lifts and on hydraulic elevators.
Digital Liftsentry because it is easy to install, reliable and with good price, It can be installed on new and modernized elevators.
Device can work with
– Mod. 942 transducer: it is installed on the car or beam close to the rope fixing poing as well as on the plates where ropes are fixed.
– Series LT load cells: they directly weight the load in the cabin when fixed below the cabin floor,between the cabin and the car and below the winch.
|Output signal type|
|Recommended power supply|
Digital Liftsentry system includes:
– 1pcs mod. 699 digital electronics with 4 digits red LEDS display, 4 push buttons for parameter settings, 12/24Vdc/ac power supply, from 0 to ±19mV or from 0 to ±39mV or from 0 to ±80mV differential input channel depending from configurations, 2pcs alarm levels with NC/NO relays, user’s friendly calibration menù, error codes for easy servicing and autozeroing function for long term reliability.
– 1pcs beam and car transducer mod. 942 for cabin load measurement
It is also possible to connect different transducers like LT1 load cells.
– Alarm levels: third alarm with relay for booking and distress signal handling.
– Buzzer: for sound signalling.
– Optical indicator: for signalling the load status in the cabin.
– Relays block when cabin is moving.
– Towed chain compensation.
– Outputs: 0-5V, CANOpen ,RS485 and RS422.
– Accelerometer: for measuring the acceleration and tilt of cabin.
Digital electronics mod. 699:
– Microprocessor electronics with a 4 digits red LEDs display ( high luminosity) and with 4 push buttons for calibration and parameter setting.
Mod. 699 shows the load in engineering units ( Kg, daN, tons etc. ) on display.
Mod. 699 can be sold with a steel flanged case or as a printed circuit with 4 throught fixing holes.
– Easy to use: because of the “user’s friendly” calibration menù and because It is possible to calibrate using a specimen weight lower than the maximum lift load capability.
– Easy to service: error messages help to solve installation and service problems ( i.e.: not connected transducer, wrong calibration etc. ).
– Easy electrical connections: screw terminal connector boards and RJ connector are easy to use.
Mod. 699 has all electrical connections numbered for an easy electrical connection.
– Power supply: a 12 or 24V DC and AC power supply allow to apply the 699 without taking care of power supply voltage polarity (calibration parameters are not lost in case of black outs)
– Input channel: 1pcs from 0 up to ±80mV differential signal from strain gauge transducers.
– Alarm levels: 2pcs with NO and NC relays outputs. Alarm levels are self adjusting to the maximum load capability of the lift.
– Zeroing function: grants the maximum long term stability reducing thermal and mechanical zero drifts.
Strain link mod. 942:
– Working principle: It measures forces and weights applied on a steel frame by measuring the proportional flexion strain. Mod. 942 mechanically amplify up to 4,3 times the strain on the metal frame.
– Strain gauge bridge: Mod. 942 has a Wheatstone bridge with 4 active measuring arms that allow a good thermal stability.
– Mechanical fixing: Mod. 942 is to be fixed firmly onto the steel metal frane in order to avoid slippings.
– Price: Mod. 942 has been patented because of Its innovative manufacturing process that allows competitive prices.
To make an order or to find the best solutions for your requirements, please don’t hesitate to contact us at the following email:[email protected]