Text version of the page

Alarm DELAY time has elapsed, the AlarmDELAY timer is reset. 2.4 Over-temperature orOver-current. This alarm occurs if any oneof following two conditionsis true:1. The device detects aninternal over-temperature condition at any time duringoperation and switches off RJCS 1.3.3 Local TEST In the absence of a signal on the “control input” terminal, alocal TEST can be made bypressing and holding the but-ton for 5 seconds. After the redLED flashes 5 times, release the button. The device willswitch ON the loads for 1 sec-ond. This test detects if there isan under-current or heaterbreak alarm condition. 1.4 Remote SetupProcedure Remote functions can beactivated with a PLC or any other logic controller byapplying timed pulses to thealarm terminal: >10V forRJCS...PO and <10V forRJCS...NO.

Solid State Relays RJCS1A23D30EPNO - 6077 Alarm Operation

2 Alarms2.1 Alarm DELAY A potentiometer on the frontof the device allows a timedelay on the heater breakalarm between 2s and 40sfor the RJCS1A... and between 0 and 40s for theRJCSR1A... For heaters having a low cold resistance, the time for the inrush current to decayto a value less than 13% ofthe current set-pint, must beadded to the potentiometeralarm delay setting plus afurther 20ms. For an alarm signal to occur,the alarm condition mustpersist throughout this timeperiod. The alarm output isenabled only after this time delay has passed. However,if the control input is dis-abled for a period of timeequal to four times the delaysetting, the internal alarm delay timer is reset automat-ically. (see example) 1.1 Current Setpoint The current setpoint is the nominal operating current thatis expected when all the heaterloads are functioning properly.If the heater loads are faulty orthe supply voltage is not close to the nominal level, the wrongsetpoint will be stored. 1.4.1 Remote TEACH Apply a 3 second pulse. Thered LED will flash after eachsecond. After the LED flash-es 3 times and the “teach”command has been accept- ed, the heater loads (of allSSRs connected to thesame alarm line) are auto-matically switched ON andthe red LED will flash quickly 10 times. When the currentsetpoint has been storedsuccessfully, the red andgreen LEDs will scroll inter- 1.2 Initialisation When the device is shipped, no setpoint is stored in theflash memory. Both greenand red LEDs will flash inter-mittently to indicate that asetpoint must be storedusing the TEACH procedure.The load will not go on when the control is applied so longas a TEACH command issuccesful. 2.2 Relay remains OFF dueto Line Voltage Loss orThyristor Open CircuitFailure. 1.3 Local Functions (85ms for RJCSRand 500ms for RJCS) the output. The red LED flashes intermittently.2. A current above the nomi- nal device rating is mea-sured during current set-point Local functions can be acti-vated by using the pushbutton on the front of thedevice. While an alarm isbeing issued by any SSR connected to the commonalarm line or a remote com-mand is being issued, nolocal commands are accept-ed. TEACH . This actionerases the current setpointfrom flash memory and both red and green LEDs will flashintermittently until a TEACHprocedure with an accept-able current is carried out.In both cases, the devicegenerates one pulse withduration of 9 seconds on thealarm terminal. The alarmsignal is non-latching. The device generates onepulse with duration of 7 sec-onds on the alarm terminal.This alarm is non-latching. The red LED remains ONafter this alarm condition until a RESET is issued. 2.3 Heater Break. A Heater Break alarm isgiven if the current mea-sured through the device is13% less than the currentsetpoint stored in the flash memory for a period of timegreater or equal to the alarmdelay potentiometersetting.The device generates onepulse with duration of 8 sec-onds on the alarm terminal.The alarm signal is non- latching. The red LEDremains ON after this alarmcondition until a 1.3.1 Local TEACH Press and hold the push but-ton for approximately 3 sec-onds. The red LED will flashafter each second. After theLED flashes 3 times, release the button. If the “teach” com-mand has been accepted theheater loads are automatically switched ON. The red LED will flash quickly 10 times. When the current setpoint has beenstored successfully, the redand green LEDs will scroll inter-mittently to indicate that the 2.5 Thyristor Short Circuit. (110ms for RJCSR and 90msfor RJCS) The device generates onepulse with duration of 10seconds on the alarm termi- nal. The alarm signal is non-latching. The red LED remains ONafter this alarm conditionuntil a TEACH procedure has beencompleted. The load will nowbe switched on or off accord-ing to the control input’s statusIt is very important to holdthe button down for only 3 flashes of the red LED tomake a successful RESET ismade. If the measured cur- rent changes to within 10%of the Current Setpoint,before the RESET is made. TEACH .If the For REMOTE operation, upto 50 devices can be con-nected in parallel to at leastone PLC input. This PLCinput must also be connect-ed in parallel to the PLC out- put. The PLC input must beprogrammed to detectalarms while the PLC outputmust be programmed tosupply the pulses requiredfor TEACH procedure isnot successful, the devicewill automatically reset to factory default (i.e. no set-point stored). 2.6 Alarms Connected inParallel to one PLC Input and one PLC Output. 1.3.2 Local RESET When an alarm has occurredthe device can be locally mittently to indicate that the RESET by pressing the pushbutton for 1 second. The redLED will flash once. This willreset the alarm. If the alarmcondition has been cleared the device will return to nor-mal operation. If the alarmcondition is still active, thedevice will automatically goback to alarm status. TEACH procedure has beencompleted. The load will nowbe switched on or off accord-ing to the control input’s status REMOTESetup . Whenmore than one device is pre- sent, pulses from the PLCoutput or alarm pulses fromany device will cause the redLEDs on all devices in paral-lel to flash intermittently for a max. of 6.25 seconds. Afterthis time, it is only deviceswith an alarm condition thatwill have their red LED on. 1.4.2 Remote RESET/UNBLOCK When an alarm has occurredthe device can be remotely RESET by applying a 1 sec-ond pulse. A 1 second pulsewill also unblock local TEACH of all SSRs connect-ed to the similar alarm line.The red LED will flash once.This will reset the alarm. Ifthe alarm condition has been cleared the device will returnto normal operation. InRJCS only, if the alarm con-dition is still active, thedevice will automatically go back to alarm status. 1.4.3 Remote BLOCK Applying a 5 second pulse will induce the device to block local TEACH. Afterthis, no local TEACH com- mands are accepted. Tounblock this situation, aremote RESET must beissued. In the case of theRJCS, if 24V supply is removed, local TEACHBLOCKis lost. AnotherREMOTEBLOCKshould beissued.

4

Specifications are subject to change without notice (05.07.2007)