Honeywell R7195A Product Data Download Page 9

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R7195A,B MOTOR POSITIONER

63-2582

Fig. 10. Flowchart to troubleshoot output Triac switch circuits for 4-20 mA input.

REPLACE Q3.

DID MOTOR

DRIVE OPEN?

IS OPERATING

VOLTAGE

120V?

TRIAC OUTPUT CIRCUIT IS OKAY.
REPLACE OR TROUBLESHOOT
PRINTED WIRING BOARD USING
SCHEMATICS.

MEASURE
AC VOLTAGE AT
TERMINALS L2 TO 1.

REPLACE Q4.

DID MOTOR

DRIVE AT

NORMAL

SPEED?

YES

IS VOLTAGE

LESS THAN

10V?

YES

REPLACE Q3,
A4, R28, R29.

YES

DID MOTOR

DRIVE OPEN?

REPLACE Q4

REPLACE Q4, A5, R31, R32.

REPLACE CR12

REPLACE Q3.

M20795

YES

SHORT TERMINALS
B TO W.

CONNECT OPERATING
VOLTAGE. OPEN INPUT
FROM CONTROLLER.

MEASURE
AC VOLTAGE AT
TERMINALS 1 AND L2.

IS VOLTAGE

LESS THAN

10V?

REPLACE Q3.

YES

DID MOTOR

DRIVE

CLOSE?

DID MOTOR

DRIVE AT

NORMAL

SPEED?

SHORT TERMINALS
B TO W.

IS OPERATING

VOLTAGE

120V?

Summary of Contents for R7195A

Page 1: ...ctionator Heavy duty case Mounts directly on M940 Actuator Solid state design extends product life and reliability Zero span and deadband adjustments allow motor to be field adjusted to various input ranges i e split ranging Hard Manual feature allows operator to override the controller 4 20 mA or 135 ohm input action to open or close fully the final control element Reversing direction of motor ca...

Page 2: ...o 66 C Slidewire Resistance 135 ohms or 1000 ohms Input Range R7195A 4 20 mA Adjustments Zero 0 8 to 16 8 mA Span 2 0 to 20 0 mA Deadband 1 to 5 Factory Settings Zero 4 0 mA input 0 to 5 feedback potentiometer position Full Scale 20 mA 95 to 100 feedback potentiometer position Input Range R7195B 135 ohm retransmitting slidewire input Adjustments Zero 0 to 80 of slidewire input Span 12 5 to 125 of ...

Page 3: ...Refer to Fig 1 and layout of the centers of the mounting hole locations on the mounting surface 1 Use a center punch and hammer to mark the locations for drilling 2 Depending on the characteristics of the mounting surface drill clearance holes No 23 bit for No 6 machine screws or starting holes No 37 bit for No 6 self tapping screws 3 Place the positioner on the surface so that the mounting holes ...

Page 4: ...tentiometer Fig 3 Multiple R7195B Motor Positioners connected to one 135 ohm input potentiometer Wiring Motor Positioner to Motor Terminals 1 Refer to wiring diagrams and documentation supplied with the motor to connect the motor positioner for specific applications 2 To avoid inductive interference to the internal circuitry separate the leads carrying line voltage from all other leads 3 Provide c...

Page 5: ... G L2 L1 2 3 1 B W R G 3 2 1 6 5 4 GROUND NEUTRAL HOT R7195 SUPPLY M940A MOTOR TERMINALS TO 4 20 mA INPUT B W R CW 135 OHM POTENTIOMETER INPUT M20790 R7195A B MOTOR POSITIONER 5 4 6 G L2 L1 2 3 1 B W R 1 L1 L2 2 3 R Y T G GROUND NEUTRAL NEUTRAL HOT HOT R7195 SUPPLY M944 G S LINE VOLTAGE MOTOR TERMINALS TO 4 20 mA INPUT B W R CW 135 OHM POTENTIOMETER INPUT M20791 ...

Page 6: ...the error signal voltage The balancing bridge circuit will amplify the error signal causing a Triac switch to fire This will energize a motor winding and will re position the feedback potentiometer until the error signal is reduced to zero Fig 8 Block diagram R7195A B MOTOR POSITIONER 5 4 6 G L2 L1 2 3 1 B W R 1 2 3 L1 L2 24 VAC 120 VAC Y T G GROUND NEUTRAL HOT R7195 SUPPLY M944B E MODUTROL MOTORS...

Page 7: ...tween the input signal and the slidewire signal is zero SERVICE AND TROUBLESHOOTING Calibration Procedure NOTE The R7195 Motor Positioner is calibrated at the factory for a 4 20 mA input signal for the R7195A and a 135 ohm potentiometer input for the R7195B Therefore do not calibrate the motor positioner unless the input signal desired is something other than 4 20 mA R7195A or 135 ohms R7195B To c...

Page 8: ...omponent failures are listed below a Shorted triac switches Q3 and Q4 b Q3 and Q4 break over at less than rated voltage c Q3 and Q4 do not fire d MOV CR12 shorts 5 If the logic diagram does not identify your system related problem the failure is not in the output circuit and the controller should be replaced or you may use the schematic to troubleshoot the board NOTE If your motor motor controller...

Page 9: ...O 1 REPLACE Q4 REPLACE Q4 DID MOTOR DRIVE AT NORMAL SPEED YES NO IS VOLTAGE LESS THAN 10V YES NO REPLACE Q3 A4 R28 R29 YES YES NO NO YES DID MOTOR DRIVE OPEN REPLACE Q4 REPLACE Q4 A5 R31 R32 REPLACE CR12 REPLACE Q3 M20795 NO YES SHORT TERMINALS B TO W CONNECT OPERATING VOLTAGE OPEN INPUT FROM CONTROLLER MEASURE AC VOLTAGE AT TERMINALS 1 AND L2 IS VOLTAGE LESS THAN 10V REPLACE Q3 YES NO YES NO YES ...

Page 10: ...AGE AT TERMINALS L2 TO 1 REPLACE Q4 REPLACE Q4 DID MOTOR DRIVE AT NORMAL SPEED YES NO IS VOLTAGE LESS THAN 10V YES NO REPLACE Q3 A4 R28 R29 YES YES NO NO YES DID MOTOR DRIVE OPEN REPLACE Q4 REPLACE Q4 A5 R31 R32 REPLACE CR12 REPLACE Q3 M20796 NO YES OPEN INPUT W CONNECT OPERATING VOLTAGE SHORT R W MEASURE AC VOLTAGE AT TERMINALS 1 AND L2 IS VOLTAGE LESS THAN 10V REPLACE Q3 YES NO YES NO YES DID MO...

Page 11: ...11 63 2582 ...

Page 12: ...ario M1V 4Z9 R7195A B MOTOR POSITIONER By using this Honeywell literature you agree that Honeywell will have no liability for any damages arising out of your use or modification to the literature You will defend and indemnify Honeywell its affiliates and subsidiaries from and against any liability cost or damages including attorneys fees arising out of or resulting from any modification to the lit...

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