Temperature Controller
model MFC-300/T-Dry
Version for Dry Transformers
Technical Manual
Licht
Page 1: ...Temperature Controller model MFC 300 T Dry Version for Dry Transformers Technical Manual Licht...
Page 2: ...n 3 3 Front panel indication 5 4 Configuration 6 4 1 Parameter reset 6 5 Programmable parameters 7 5 1 Current outputs option 8 5 2 MODBUS protocol 9 5 3 DNP3 protocol option 9 5 4 Clock 10 6 Addition...
Page 3: ...oop outputs one for each input Versions with up to 12 relays may be supplied on special order The temperature acquisition is performed with 16 bit resolution All DC signals are sampled after a 50 60 H...
Page 4: ...set point For example if the cooling hysteresis is configured to 2 C then in the example above the cooling relay will only be deativated once RTD 2 s temperature drops below 80 2 78 C Relays dedicated...
Page 5: ...C s Detection of inconsistencies in the measurement circuit Any of the events above triggers the activation of the RTD fault relay the activation of the cooling relay and the inhibition of future rela...
Page 6: ...re display the presented values are those measured by the RTDs com pensated for each sensor s intrinsic nonlinearity and cable resistances The Resistance option presents the physical RTD resistances r...
Page 7: ...s to select each letter and P to advance between letters The default password is AAAA 3 Using the and keys choose the desired parameter 4 Press P to confirm the parameter s selection 5 Choose the desi...
Page 8: ...ions 0 to 255 C in increments of 1 C Description Temperature set point for activating the alarm relay associated with each RTD Parameter Trip Set Point 1 6 Options 0 to 255 C in increments of 1 C Desc...
Page 9: ...y for the activation of the trip relay Parameter Daily Cooling Start Options 00 00 to 23 59 in increments of 1 minute Description Time of day at which all cooling relays are forcefully activated Use t...
Page 10: ...ameter Address Options 1 to 247 Description MODBUS address for the MFC 300 T Dry 5 3 DNP3 protocol option Parameter Baud Rate Options 9600 19200 38400 57600 115200 bps Description baud rate for the RS...
Page 11: ...or multi drop scenarios where more than one outstation may transmit over the same line To handle collision avoidance a backoff scheme is implemented Before transmitting the MFC 300 T Dry always waits...
Page 12: ...ht labs com info licht labs com Rev A1 30 05 12 MFC 300 T Dry Technical Manual 11 6 Additional versions Figure 6 1 MFC 300 T Dry Controller 96x96 version Figure 6 2 MFC 300 T Dry Controller with weath...
Page 13: ...ptions Panel mounted Dimensions 96 x 96 x 190 mm or 96 x 48 x 190 mm Weight 550 g DC Inputs Types RTD current loop voltage Error Non linearity 0 2 0 1 10 C Current Outputs Scales 0 1 0 5 0 10 0 20 4 2...
Page 14: ...Licht http www licht labs com info licht labs com Rev A1 30 05 12 MFC 300 T Dry Technical Manual 13 B Housing diagrams...
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Page 17: ...Licht http www licht labs com info licht labs com Rev A1 30 05 12 MFC 300 T Dry Technical Manual 16 C Weatherproof enclosure layout...
Page 18: ...Licht http www licht labs com info licht labs com Rev A1 30 05 12 MFC 300 T Dry Technical Manual 17 D Connection diagrams...
Page 19: ...ts must be preserved up to frequencies in the order of MHz over all their extension including curves and junctions In order to guarantee this continuity joints and bonds should present electrical cont...
Page 20: ...licht labs com Rev A1 30 05 12 MFC 300 T Dry Technical Manual 19 i RS 485 devices must be connected in a bus topology No other network topology tree star ring etc is acceptable j Dry contact inputs if...
Page 21: ...1 6 0 to 255 C 1 41 46 Trip Set Point 1 6 0 to 255 C 1 201 Indication Type 0 temperature 1 resistance 1 202 Number of Active RTDs 1 to 6 1 203 Fan Hysteresis 1 to 255 C 1 204 Alarm Hysteresis 1 to 25...
Page 22: ...10 505 RTD3 Temperature 0 0 to 255 0 C 10 506 RTD3 Resistance 0 0 to 255 0 10 507 RTD4 Temperature 0 0 to 255 0 C 10 508 RTD4 Resistance 0 0 to 255 0 10 509 RTD5 Temperature 0 0 to 255 0 C 10 510 RTD5...
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