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TE Technology TC-24-25, Operation Manual

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TE Technology TC-24-25 Operation Manual Download Page 15

Block Diagram 

INPUT #1 S ENSOR

TEMPERA TURE

SENSOR

-20 °C TO 100 °C

10K OHM POTE NTIOME TE R

0 TO 5 V DC*

4 to 20 mA DC**

OR

0 TO 20 mA DC**

PC SET VALUE

DIFF SET = INPUT 2

INPUT #2  AUXILLARY INP UT

*CONTROLLER INPUT IMPEDANCE 6.5K OHMS

**REQUIRES ADDITION OF  EXTERNAL RESISTOR

SUMMING

JUNCTION

CONTROL

PID
PID W/ ALARM
DEADBAND
DEADBAND W/ ALARM

OUTP UTS

H-B RIDGE
1 TO 25 A PWM
675 OR 2700 Hz

REMOTE INDICA TOR

RED/YELLOW/GREEN

LED’S

INPUT #1 S ENSOR

TEMPERA TURE

SENSOR

-20 °C TO 100 °C

INPUT #1 S ENSOR

TEMPERA TURE

SENSOR

-20 °C TO 100 °C

10K OHM POTE NTIOME TE R

0 TO 5 V DC*

4 to 20 mA DC**

OR

0 TO 20 mA DC**

PC SET VALUE

DIFF SET = INPUT 2

INPUT #2  AUXILLARY INP UT

*CONTROLLER INPUT IMPEDANCE 6.5K OHMS

**REQUIRES ADDITION OF  EXTERNAL RESISTOR

10K OHM POTE NTIOME TE R

0 TO 5 V DC*

4 to 20 mA DC**

OR

0 TO 20 mA DC**

PC SET VALUE

DIFF SET = INPUT 2

INPUT #2  AUXILLARY INP UT

*CONTROLLER INPUT IMPEDANCE 6.5K OHMS

**REQUIRES ADDITION OF  EXTERNAL RESISTOR

SUMMING

JUNCTION

SUMMING

JUNCTION

CONTROL

PID
PID W/ ALARM
DEADBAND
DEADBAND W/ ALARM

CONTROL

PID
PID W/ ALARM
DEADBAND
DEADBAND W/ ALARM

OUTP UTS

H-B RIDGE
1 TO 25 A PWM
675 OR 2700 Hz

H-B RIDGE
1 TO 25 A PWM
675 OR 2700 Hz

REMOTE INDICA TOR

RED/YELLOW/GREEN

LED’S

REMOTE INDICA TOR

RED/YELLOW/GREEN

LED’S

 
 

15

Summary of Contents for TC-24-25

Page 1: ...4 25 RS232 Thermoelectric Cooler Temperature Controller November 8 2005 Drawing 3599 Rev F TETECHNOLOGY INC 1590 Keane Drive Phone 231 929 3966 Traverse City MI 49686 8257 Fax 231 929 4163 http www te...

Page 2: ...ng of the thermoelectric device either of which are known to reduce the lifetime of any thermoelectric device Care should be taken to prevent the temperature of the thermoelectric device from going be...

Page 3: ...able Computer set with controller stand alone operation Remote user set temperature potentiometer 0 mA to 20 mA current loop 0 VDC to 5 VDC adjustable range Differential temperature control No compute...

Page 4: ...ol Mechanically the control printed circuit board is mounted to a metal bracket that is suitable for either horizontal or vertical orientation Input and output connections are accessible via screw typ...

Page 5: ...ature All temperatures may be consistently displayed in C or F Two types of control output modes may be selected This determines the direction of the current flow through the thermoelectric cooler dur...

Page 6: ...r supplied with the TC 24 25 RS232 is the MP 2379 Appendix D Thermistor Styles for TC 24 25 RS232 shows dimensional data on the MP 2379 and other thermistor styles readily available as well as tempera...

Page 7: ...en click the Send Box Values button prior to proceeding 2 2 First select the PWM OUTPUT TIMEBASE menu key Options for SLOW TIMEBASE 675Hz or FAST TIMEBASE 2700Hz will appear Select the option that is...

Page 8: ...tions NO ALARM PICKED indicates that no alarm parameters are desired SET TRACKING ALARMS allows an alarm to be set with respect to the set temperature It will move accordingly with a change of the tem...

Page 9: ...C OR DEG F menu key permits the selection of displaying F or C 2 14 The EEPROM WRITE ENABLE located just below the CONFIGURE SECTION can be checked or unchecked depending on your requirements See Appe...

Page 10: ...Send Box Values button to download these constants to the controller 4 0 Calibration 4 1 The CALIBRATE section provides additional variables that can be used to fine tune your system s operation You...

Page 11: ...stom Software The controller does not specifically have to be used with the software that is provided You could also use commercial software such as LabVIEW from National Instruments This might be use...

Page 12: ...Controller Wiring Diagram 12...

Page 13: ...uous current 8 7 6 5 4 3 2 1 Expansion Connector Molex 22 23 2081 25 mA Current Source Alarm Cancel Input Common High Alarm Low Alarm No Alarm JP2 8 7 6 5 4 3 2 1 Customer supplied Connector Note Pins...

Page 14: ...Mechanical Package Drawing 14...

Page 15: ...O 100 C 10K OHM POTENTIOMETER 0 TO 5 VDC 4 to 20 mA DC OR 0 TO 20 mA DC PC SET VALUE DIFF SET INPUT 2 INPUT 2 AUXILLARY INPUT CONTROLLER INPUT IMPEDANCE 6 5K OHMS REQUIRES ADDITION OF EXTERNAL RESISTO...

Page 16: ...WIRE TO JP3 3 BLACK WIRE TO JP3 3 RED WIRE TO JP3 2 RED WIRE TO JP3 2 CLEAR WIRE TO JP3 1 CLEAR WIRE TO JP3 1 THERMISTOR WIRES TO JP1 5 AND JP1 6 POLARITY NOT IMPORTANT THERMISTOR WIRES TO JP1 5 AND J...

Page 17: ...owing table offers possible solutions corresponding to a particular error Error Message Cause Solution Comm Port Timeout No power to TC 24 25 RS232 unit Apply power to TC 24 25 RS232 review customer d...

Page 18: ...hand if the bandwidth is too small and there is any time lag between the cooling heating element and the temperature sensor the temperature will initially overshoot the set point and then settle into...

Page 19: ...compensate for rapid changes in system loading This term is generally used only on very sluggish systems or where very quick response is necessary The acceptable range for the TC 24 25 is 0 1 to 10 cy...

Page 20: ...presented by two hex characters is compared to the two ASCII character hex checksum sent by the controlling computer The TC 24 25 RS232 will respond as shown below depending on whether or not the chec...

Page 21: ...lue of 0 selects a computer communicated set value so the eight character send value DDDDDDDD is 00000000 4 Compute the checksum SS by adding the ASCII values of the following characters 0 0 2 9 0 0 0...

Page 22: ...will send back stx 000003e8c0 ack If the checksum is not correct the temperature controller will send back stx XXXXXXXXc0 ack Read the actual temperature of the control thermistor INPUT1 from the con...

Page 23: ...on One millisecond might be a good delay time to use initially but the exact time will vary depending on the host computer s hardware and the particular demands on the controller at the moment IV Comm...

Page 24: ...This function tells the controller how the set point temperature will be communicated 0 sent or returned means computer communicated set value 1 sent or returned means Potentiometer Input 2 sent or re...

Page 25: ...25 Read Command 45 hex Interpret 0 is HEAT WP1 and WP2 1 is HEAT WP2 and WP1...

Page 26: ...lue to decimal and divide by 10 0 to convert to F C 13 PROPORTIONAL BANDWIDTH Write Command 1d hex Read Command 51 hex Interpret Fixed point temperature bandwidth in F C Multiply desired bandwidth by...

Page 27: ...Temperature reference to compare against Input1 for high alarm output 20 LOW ALARM SETTING Write Command 24 hex Read Command 58 hex Interpret Temperature reference to compare against Input1 for low al...

Page 28: ...command to reset the alarm latches 27 HEAT MULTIPLIER Write Command 0c hex Read Command 5c hex Interpret This multiplies the heater percentage of power to offset its effectiveness 100 is a multiplier...

Page 29: ...will also alleviate a possible problem since the maximum number of writes to an EEPROM location is 1 000 000 V ASCII Reference Table Dec Oct Hex Binary Description 000 000 00 00000000 NULL NUL null c...

Page 30: ...0101010 asterisk star 043 053 2B 00101011 addition sign 044 054 2C 00101100 comma 045 055 2D 00101101 subtraction sign minus hyphen negative dash 046 056 2E 00101110 period dot decimal 047 057 2F 0010...

Page 31: ...01100001 a 098 142 62 01100010 b 099 143 63 01100011 c 100 144 64 01100100 d 101 145 65 01100101 e 102 146 66 01100110 f 103 147 67 01100111 g 104 150 68 01101000 h 105 151 69 01101001 i 106 152 6A 01...

Page 32: ...APPENDIX D Thermistor Styles for TC 24 25 RS232 MP 2444 MP 2444 MP 2379 MP 2379 MP 2379 MP 2542 MP 2542 MP 2542 32...

Page 33: ...40 7976 61 3590 82 1761 1 51750 20 18751 41 7662 62 3464 83 1705 0 49157 21 17923 42 7362 63 3343 84 1652 20 146735 1 46709 22 17136 43 7075 64 3227 85 1601 19 138447 2 44397 23 16388 44 6801 65 3115...

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