JRC JCY-1900 - Digital Signal Converter 32 CH and 64 CH: NCT-82;83

3. OPERATION CHECKING ON HARDWARE
JCY-1900
/
1950
V
DR Service Manual
62
DOC No. 7ZPNA4409
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 Lighting Specifications
“TXD1” Lights when CH1 is transmitting.
“RXD1” Lights when CH1 is receiving.
“TXD2” (only NCT-83) Lights when CH2 is transmitting.
“RXD2” (only NCT-83) Lights when CH2 is receiving.
2) POWER
The lighting specifications of the LEDs:
LED Name Lighting Specifications
“PWR(5V)” Lights when the DSC is supplied with 5V.
“PWR(12V)” Lights when the DSC is supplied with 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 Lighting Specifications
CDn (NCT-82: n:1-32)
(NCT-83: n:1-64)
OPEN: Green LED put out lights
CLOSE: Green LED lights up