There are many different types of sensors or switches that can be used
with Lean Tempo units. Sensor selection can be very complicated and
there are many resources to help with the complex task. This guide is
intended as a starting point to get you started in the right direction.
Use this advice at your own risk, and know that sometimes for sensing
applications multiple sensors might need to be tried to get the best
Question 1: Does something pass a standard location each time a
product is produced? If yes go to question 2, if no it might be best
to use the button on the unit, or use the switch ports to connect a
normally open (NO) switch that is closer to the operation to reduce
walking. This switch could be a foot pedal, or any other NO switch.
Question 2: Is there something that cycles the same (ie a machine
that goes up and down in the same way) for every completed product? If
so look at connecting a limit switch that will close contacts when the
machine cycles, if not go to question 3.
Question 3: Is the product magnetic? If yes look at inductive
proximity sensors. These sensors have a short range, but work great
for things like stamping presses... If no, or if the sensor must be
mounted more than an inch from the product go to question 4.
Question 4: Is the product shiny or reflective? If yes look at thru
beam photoelectric sensors, if no move to question 5.
Question 5: Is the product transparent? If yes get help from a
sensor specialist such as Keyence, Banner, or an automation
specialist. If no go to question 6.
Question 6: Is the product further than a few inches away from the
desired sensor location? If yes look at photoelectric sensors with a
reflector, if no look at photoelectric sensors without a reflector.
Note: Many modern sensors are either NPN, or PNP; neither can be connected directly to the Lean Tempo unit
Connect the sensor to the lean tempo unit as shown in the wiring diagrams below.
If an NPN or PNP sensor is used on one of the older units where the ground input isn't labeled, the ground can be found by checking continuity from one of the small screws on the bottom to each of the inputs.
Connecting a PNP sensor incorrectly can ruin the unit, follow the wiring diagram exactly
All connections are made with banana plugs; to use unscrew the black plastic from the metal, put the wire in the black plastic hole with the wide end facing the end of the wire, strip 1/4" of the wire and stick that in the hole on the metal portion of the banana plug, screw the two together and tug to make sure it connected, if it comes apart repeat but push the wire in the metal portion further stripping a little more wire can be helpful.
Configuring Inputs - Plus and Pro Only
To get to the input configuration go to the menu by pressing the menu button from the display screen, then go to ..... after arriving at the sensor configuration menu choose the variable that you would like the sensor to impact
There are two ways to configure an input: 1. Confugure the input for a momentary button, if it sees the button press and release it will increment count, or start downtime, or whatever else it is configured to do. 2. Configure the input for a switch. This doesn't work for incrementing counts, but works great for things like downtime, imagine the unit being connected to a light switch and when the switch is on the unit is in downtime mode, and when the switch is off the unit is not in downtime.
Unit doesn't increment count with sensor
Is the input configured properly see Configuring Inputs section?
Are both wires plugged in? If not connect both wires according to wiring diagrams
Is a PNP or NPN sensor being used? If yes make sure the ground is common for the sensor and the unit ie. all grounds should be connected together
Unit increments in unexpected way
Is a PNP sensor being used? If yes make sure it is connected as shown in the appropriate wiring diagram. Connecting a PNP sensor directly can damage the unit
The other cause for this is a grounding problem. Since the power supply only has two prongs in rare situations a ground needs to be connected from one of the small screws on the bottom of the unit to the building ground.
The Lean Tempo Basic improves
productivity, gives real-time production status, is simple to
use, and is user configurable. All for only