18 Alarm Port ConnectionThe ALARM port can be used for connecting the alarm sen-sor and alarm control switches. It is also used to synchro-nize the sequence as shown below.• Connect the sensor switches to the ALARM port on therear of the Disk Recorder, as shown in the examplebelow.DesignationPinNo.12345678910111213Alarm Input 1Alarm Input 2Alarm Input 3Alarm Input 4Sequence Timing InputAlarm Reset OutputGroundAlarm Recover InputAlarm OutputAlarm Input 10Alarm Input 11Alarm Input 12Alarm Input 13PinNo.141516171819202122232425DesignationGroundAlarm Input 5Alarm Input 6Alarm Input 7Alarm Input 8Alarm Input 9Ground+5 V Output (0.2 A)Recording Timer SelectInputAlarm Input 14Alarm Input 15Alarm Input 16ALARM1131425• The sequence timing can be assigned to one of therecorders when the multiple Disk Recorders areequipped in the system.Connect the CONTROL port and ALARM port as shownbelow.Refer to the SEQ TIMING in the SEQUENCE SETUPmenu for further setting.If the sequence timing is controlled from the outboarddevice, the input signal is required as shown in the fig-ure. For example, the WJ-HD500B output is also in thefigure.CONTROL57GroundSequence Timing InputALARMWJ-HD500B (1st) WJ-HD500B (2nd)154Sequence Timing OutputGroundinput100 ms 100 msWJ-HD500Boutput500 ms 100 ms