DigiTrace 920 Series Heat Trace Controller - Pentair Thermal ...

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C.5 External Input/Output Port WiringC.5.1 EXTERNAL INHIBIT/OVERRIDE USING A DRY CONTACTTerminal board+9Vdc nomExt. contactInputCommon1+20– 21 2External dry contact(Close to activiate inhibit or override mode)(2k max total loop resistance)C.5.2 EXTERNAL INHIBIT/OVERRIDE USING A DC SIGNALTerminal board+9Vdc nomExt. contactInputCommon1+20– 212+–+–+5VDC to 24VDC nominal, 10ma. maxC.5.3 TEMPBUS AND INHIBIT MASTER/SLAVE CONNECTIONSTerminal boardTerminal boardExt. contactOutput+–4520 +21 –Ext. contactInput“Slave” 920 controller #1Ext. contactInput+ 20– 21Ambient sensing “master” 920 controllerTerminal boardUp to 25 “slave” 920 controllers (50 points)may be tied to one “master” 920 controller.Note that the “master” and “slave”controllers must be installed within thesame enclosure.20 +21 –Ext. contactInput“Slave” 920 controller #2Terminal board20 +21 –Ext. contactInput“Slave” 920 controller #25THERMAL MANAGEMENT SOLUTIONS EN-DigiTrace920series-IM-H56874 04/13 72 / 82
Appendix D HTC Load Shedding SequenceLoadsheddingcommandreceived?NNormal controlmodeYHTCload shedenabled?NYAll othercontact inputsactive?[1]NYHTC holds its outputOFF for 30 secondsIscommunicationsactive?[2]NYHas HTCpower beenreset?YControl at lowtemp. alarm setpointNYFail safe modeenabled?YHTC temp. atlow temp.alarm SP?[3]NAll matching HTCs set theiroutputs to OFFHTC display indicates loadshedding mode [4]N1. If an HTC is associated with more than one contact input, all inputs must be activated beforethe HTC will go into a Load Shedding mode.2. If communications between an HTC and an upstream device such as a GCC or supervisorysoftware are interrupted, or if the power has been reset to the HTC, the HTC will hold itsoutput OFF, waiting for a Load Shedding command3. Only if the Low Temperature Alarm is ENABLED.4. For 920 Series controllers, a “” message will displayed after the loadcurrent reading.THERMAL MANAGEMENT SOLUTIONS EN-DigiTrace920series-IM-H56874 04/1373 / 82
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Section I - Overview1.1 Controllers
Page 8 and 9:
CSA C/US and c-ETL-us ApprovedThe 9
Page 10 and 11:
1.5.1 ENCLOSURE ASSEMBLYEnclosure A
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The user may want to consider enclo
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Temperature SensorsTerminal No.Poin
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2.7.6 INPUT POWERThe 920 controller
Page 18 and 19:
Section 3 - Programming and Configu
Page 20 and 21:
3.5.2 ALPHANUMERIC TAG ASSIGNMENTPu
Page 22 and 23: Range: 0.3 to 100.0 amps(CURRENT TU
Page 24 and 25: 3.5.15 TS 1 HIGH LIMIT CUTOUTPurpos
Page 26 and 27: IMPORTANT:• Auto-cycling should a
Page 28: 3.6 Common Controller SetupThis is
Page 31 and 32: • This alarm must be enabled and
Page 33 and 34: Procedure: Enable or disable the al
Page 35 and 36: • If the user resets an alarm whi
Page 37 and 38: efore the corresponding alarm will
Page 39 and 40: the overcurrent trip limit and the
Page 41 and 42: the 920 control module, these param
Page 43 and 44: 3.10 Operator Console Functionsbut
Page 45 and 46: eset. All load-shedding parameters
Page 47 and 48: interface.IMPORTANT: The controller
Page 49 and 50: Section 5 - Control Modes5.1 Introd
Page 51 and 52: 5.3 Load Shedding Control ModeLoad
Page 53 and 54: Section 6 - Troubleshooting6.1 Oper
Page 55 and 56: If the bounce or instability is exc
Page 57 and 58: 6.3 Common Alarms—What to look fo
Page 59 and 60: Section 7 - Maintenance7.1 Operator
Page 62 and 63: Appendix B Typical Enclosure Dimens
Page 64 and 65: B.3 Four-Point Assembly #10160-1254
Page 66 and 67: B.5 Twenty-Point Assembly #10160-04
Page 68 and 69: C.1.2 100Ω NICKEL IRON RTD WIRINGC
Page 70 and 71: C.3 Communication Wiring C.3 Commun
Page 74 and 75: Appendix E 100 Ω Platinum RTD Tabl
Page 76 and 77: Appendix G Factory Default/Configur
Page 78 and 79: Other Alarms Configuration Sub-Menu
Page 80 and 81: Other Alarms Configuration Sub-Menu
Page 82: WWW.THERMAL.PENTAIR.COMNORTH AMERIC
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