JRC JCY-1800 - Page 38

2. Installation Procedures
JCY-1800/1850 VDR/S-VDR Installation Guide
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DOC No. 7ZPJD0387C
2.2.7. Switching Radar
When two radars are connected and VDR record one of two radar images by switching.
1) In case of JRC Radar
The following radars output a PJRC sentence which includes a status of transmitting RF signal.
When main radar is transmitting, main radar image is recorded. When main radar is not transmitting, sub radar image
is recorded.
Connect a serial output data from Radar unit to the RCU.
Model PJRC Remark
JMA-5300 Support
JMA-9900 Support
JMA-900 Support Ver. 2.0.8 or later
Other old model Not support
Outputting sentence of the Radar unit
$PJRC, RA, 15, ?, xxxxxxxxxx*hh<CR><LF>
? = 1: transmitting RF
0: not transmitting RF
2) In case of switching signal by dry-contacts
In order to switch by dry-contacts, it is necessary to set the logic of dry- contact (Open/Close) for radar selection
(Auto selection/Main/sub)
E.g.） Setup Table
PI_1 PI_2 MODE
OPEN OPEN AUTO
OPEN CLOSE CH1 record
CLOSE OPEN CH2 record
CLOSE CLOSE
－
3) In case of none switching signal by dry-contact
Radar image in CH input image signal is recorded.
When radar images are input to both of CH, CH1 image is recorded.
PI_1
PI_2