4 Technical specifications
External sensors
The external sensors are used for seat-lift supervision when seat-lift can not be internally detected. The sensors get their supply
voltage from the terminal row. The output signals from the sensors are connected to two inputs on the terminal row on the
internal sensor unit. If the actual setup is set for internal seat-lift, the corresponding external signal is not used, otherwise the
external signal logically controls the corresponding feedback to the PLC (Programmable Logic Controller).
Note! If using external sensor, the sensor must be active/activated when performing a setup routine of the control head.
Supply voltage. . . . . . . . . . . . . . . . . . . . . . . Must match the selected type of ThinkTop.
Supply current: . . . . . . . . . . . . . . . . . . . . . . Max. 15 mA per sensor.
Type of sensor: . . . . . . . . . . . . . . . . . . . . . . DC, Only 3-wire sensor PNP.
Sensor cable length:
. . . . . . . . . . . . . . . . Max. 3 m.
Polarity
PNP (sourcing) or NPN (sinking) function is selected with a jumper in term. 12 and 13. Jumper present = PNP. If changing to
NPN remove the jumper and make a power recycle. A power recycle is always required when changing this function.
ThinkTop Visual Indications
LED Indications
LED B
“Open valve” (Yellow)
O
IR-Receiver
LED D
“Setup/Internal fault” (Red)
LED C
“Seat-lift 1/2” (Yellow)
LED E
“Solenoid valves” (Green)
LED F
“Maintenance” (Orange)
LED B
LED D
LED C
LED E
LED F
LED A
LED A
“Closed valve” (Yellow)
Feedback signals
Signal:
“Closed Valve”
Terminal 1
(Feedback #1)
Signal:
“Open Valve”
Terminal 2
(Feedback #2)
Signal:
“Seat-lift 1”
Terminal 3
(Feedback #3)
Signal:
“Seat-lift 2”
Terminal 4
(Feedback #4)
Signal:
“Status”
Terminal 5
(Feedback #5)
For wire connections: See 5.4 Electrical connection, internal
Note: If the programmer wishes to detect a physical closed valve position in an “Open Valve” sensor position, then there is no
longer any consistence between the sensor valve detection position and the visual indications of the ThinkTop.
Status signal (Feedback # 5)
The status signal is used for four purposes:
-
To indicate that setup is in pr (LED D).
-
To indicate an error con (LED D). (Flashing LED = software error), (steady LED = hardware error).
-
To indicate maintenance due to the self adjustment pro (LED F).
-
To indicate that the time for maintenance has been r (LED F).
Technical specifications solenoid valves
Solenoid valve signals
Three output signals (with one common, terminal 11) from the terminal row are used for activation of the solenoids. Depending
on the PLC used, the common could be either positive (connected with terminal 9) or negative for DC voltage. The signals are
galvanically isolated from the sensor circuits.
Internal connections
Terminals for wire connection of the solenoids mounted internally in the control head. The number of solenoids actually mounted
in the control head could be 0 - 3. The signals are taken directly from the terminal row.
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