Avantra 36/44 Service Manual
2.3.3 The LUTH Motor Board (LMB)
The Luth Motor Board (LMB):
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Amplifies the motor preset value to the corresponding high voltage to drive
the main motor.
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Senses and limits the armature current.
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Receives and converts I/R pulse preset values.
Description of Inputs and Outputs (P/N 52024000100)
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X102 1, 2–24V AC input.
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X102 5, 6–0-24 DC output.
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X1 1, 2, 3–Optical interrupter.
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X3 1, 2–Tacho feedback to CPU.
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U201–Infrared receiver.
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X4 1,2–Motor overload signal.
2.3.4 The Agfa Terminal Board (ATB)
The Agfa Terminal Board (ATB):
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Displays convenient information
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Organizes the output from activated keys
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Organizes the input data
Description of Inputs and Outputs
1, 2–Data communication link between the LCB and the Agfa Terminal Board
(ATB). RS-232 serial data coded as ASCII characters are interchanged.
2.3.5 Sensors
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Optical Interrupter–This device consists of a transmissive sensor with four
(4) wires and connectors. The operating wavelength is 950 nm. The detec-
tor is a Photologic IC with Schmitt-Trigger output. Aperature size is 0.5 mm.
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Film Sensors (Input, Input/Output, Exit)–This sensor is an ultra low force
motion sensor. It features a long-life reed switch, an integral actuator arm,
and a magnet.
Operating Parameters:
Off point: Less than 10 ° rotation from rest position.
On point: Greater than 3 ° rotation from rest position.
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Temperature Sensor–The sensitive element is a platinum-coated ceramic
wafer manufactured by thin film techniques. The exact value is obtained by
laser trimming.
2-8 Functional Analysis