Digital Signal Converter 32Ch And 64Ch : Nct-82/83 - JRC JCY-1900 Service Manual

3. OPERATION CHECKING ON HARDWARE
JCY-1900/1950 VDR Service Manual

3.6. Digital Signal Converter 32CH and 64CH : NCT-82/83

The dry Contact Signal Input Board (CQD-2284, 2285) on the DSC has the LEDs that display the following state.
1) COMMUNICATION
The lighting specifications of the LEDs:
LED Name
"TXD1"
"RXD1"
"TXD2" (only NCT-83)
"RXD2" (only NCT-83)
2) POWER
The lighting specifications of the LEDs:
LED Name
"PWR(5V)"
"PWR(12V)"
3) Dry Contact
This LEDs shows status of each dry contact signals.
Check the change of state of dry contact signals by the display of LEDs.
The lighting specifications of the LEDs:
LED Name
CDn (NCT-82: n:1-32)
(NCT-83: n:1-64)
DOC No. 7ZPNA4409
Lights when CH1 is transmitting.
Lights when CH1 is receiving.
Lights when CH2 is transmitting.
Lights when CH2 is receiving.
Lights when the DSC is supplied with 5V.
Lights when the DSC is supplied with 12V.
OPEN: Green LED put out lights
CLOSE: Green LED lights up
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Lighting Specifications
Lighting Specifications
Lighting Specifications