Showmaster Overview
Medialon Showmaster User Manual
p 23 of 42
M569-3 | June 2023
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[DMX 2] DMX Port 2: Input / Output DMX512
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[MIDI In] MIDI Port: Input MIDI
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[MIDI Out] MIDI Port: Output MIDI
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[Timecode In] Timecode Port: Timecode Input
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[Timecode Out] Timecode Port: Timecode Output
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[Video Ref] BNC Port: Blackburst Video Reference Input
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[Serial 1] Serial Port 1: Serial RS232 port
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[Serial 2] Serial Port 2: Serial RS232 port
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[Serial 3] Serial Port 3: Serial RS232 port
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[Serial 4] Serial Port 4: Serial RS232 port
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[Serial 5] Serial Port 5: Serial RS232 port
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[Serial 6] Serial Port 6: Serial RS232 port
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[Serial 7] Serial Port 7: Serial RS232 port
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[Serial 8] Serial Port 8: Serial RS232 port
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[Relay Outputs] Digital Output Port: 16 Form C electro-mechanical 1A relays
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[Digital Inputs] Digital Input Port: 16 optically isolated inputs
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[POWER] Power Connector 12 V DC 5 A.
Digital Input/Output Port Wiring
Digital Input Connector
Medialon Showmaster Pro has sixteen optically-isolated inputs that can accept either AC or DC
signals and are not polarity sensitive. Input signals are rectified by photocoupler diodes and
unused power gets dissipated through a 1.8 k
Ω
resistor in series. The inputs may be driven by
either DC or AC sources of 3 to 31 volts (RMS with frequencies of 40 Hz to 10 kHz). Standard
12/24 volt AC control transformer outputs can be accepted as well. External resistors connected
in series may be used to extend the input voltage range, however this will raise the input threshold
range.
Isolated Inputs are connected to Showmaster Pro via a SubD 37 pin Male connector.
Input X A
SHOWMASTER
Input X B
+
DC
−
Push Button
