Contents 
 
Preface ............................................................................................................................................  ⅰ 
Before use .......................................................................................................................................  ⅱ 
The cautions on use ........................................................................................................................  ⅲ 
JCX-161 Bridge Navigational Watch Alarm System External Appearance .................................. vii 
Chapter 1 General Outline of Equipment ........................................................................................... 1 
1.1 Functions .................................................................................................................................... 1 
1.1.1 Purpose of the system ......................................................................................................... 1 
1.1.2 Operation modes.................................................................................................................. 1 
1.1.3 Operation sequence of displays and alarms ....................................................................... 2 
1.2 Features ...................................................................................................................................... 3 
1.2.1 Versatile functions with standard configuration ................................................................... 3 
1.2.2 Various reset devices and number of inputs ........................................................................ 3 
1.2.3 Output to external equipment .............................................................................................. 3 
1.2.4 Remote maintenance function ............................................................................................. 3 
1.3 Configuration .............................................................................................................................. 4 
1.4 Outline dimensions ..................................................................................................................... 5 
1.4.1 Control unit (NCK-175) ........................................................................................................ 5 
1.4.2 LCD display unit (NWZ-4650) .............................................................................................. 6 
1.4.3 Buzzer unit (NVS-785) ......................................................................................................... 7 
1.4.4 Reset button unit (NCJ-895) ................................................................................................ 8 
1.4.5 Motion sensor (NYG-5) (Option) .......................................................................................... 9 
1.4.6 LED Warning lamp unit (NCD-2257) (Option) ................................................................... 10 
1.4.7 Reset button unit (Waterproof) (NCJ-896) (Option) ........................................................... 11 
1.5 System diagram ........................................................................................................................ 12 
Chapter 2 Names and Functions of System Components ............................................................. 13 
2.1 Power switch and how to turn it on ........................................................................................... 13 
2.2 LCD Display unit (NWZ-4650) .................................................................................................. 16 
2.2.1 Mark and function of button ...............................................................................................
 16 
2.2.2 Display and function of screen ........................................................................................... 18 
2.2.3 Display of each alarm stage ............................................................................................... 19 
2.3 Buzzer unit (NVS-785) .............................................................................................................. 21 
2.3.1 Names and functions of system components .................................................................... 21 
2.4 Reset button unit (NCJ-895) ..................................................................................................... 22 
2.4.1 Names and functions of system components .................................................................... 22 
2.5 Motion sensor (NYG-5) (Option device) ................................................................................... 25 
2.5.1 Names and functions of system components .................................................................... 25 
2.6 LED Warning lamp unit (NCD-2257) (Option device) .............................................................. 28 
2.6.1 Names and functions of system components .................................................................... 28 
2.7 Reset button unit (Waterproof) (NCJ-896) ............................................................................... 30