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POLYSPEDE OC2-500 Manual

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SECTION
1. GENERAL DESCRIPTION.......................................................................... 1
2. CONTROL SPECIFICATIONS, TABLE I ........................................................3
3. INSPECTION ..........................................................................................3
4. INSTALLATION ......................................................................................3
4.1
Mounting of Open Chassis OC2-500 Control ..........................................3
4.2
Mounting of Enclosed OC2E-500 Control ..............................................4
4.3
Wiring Procedure ...........................................................................4
5. INITIAL TURN-ON PROCEDURE ................................................................6
6. ADJUSTMENTS .......................................................................................6
6.1
Adjustment Procedure Chart, Table II ....................................................8
7. CONTROL OPERATION ............................................................................10
8. TROUBLESHOOTING ................................................................................10
8.1
Troubleshooting, Table ......................................................................10
Troubleshooting Table II .....................................................................11
8.2
Troubleshooting Procedure - In Case of Fuse Blowing .................................13
9. POWER MODULES AND D50 TESTING .........................................................15
10. MOTOR TESTS ........................................................................................16
11.1
Contactor Operation on the DC Lines .....................................................16
11.2
Contactor Operation on the AC Lines ......................................................17
11.3
Contactor Reversing .........................................................................17
12. DYNAMIC BRAKING (OPEN CHASSIS CONTROLS ONLY) ..............................18
13.1
Speed Programming ..........................................................................18
13.2
Torque Programming ........................................................................19
14. TACHOMETER FEEDBACK ........................................................................19
Table IV ........................................................................................20
15. MAINTENANCE - CONTROL .......................................................................21
16. MAINTENANCE - MOTOR ..........................................................................21
17. MAINTENACE - SPEED REDUCER ...............................................................21

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Summary of Contents for POLYSPEDE OC2-500

  • Page 1: Table Of Contents

    1. GENERAL DESCRIPTION……………………………………………………………….. 1 2. CONTROL SPECIFICATIONS, TABLE I ………………………………………………..3 3. INSPECTION …………………………………………………………………………..….3 4. INSTALLATION ………………………………………………………………………..…3 Mounting of Open Chassis OC2-500 Control ……………………………………3 Mounting of Enclosed OC2E-500 Control ……………………………………….4 Wiring Procedure …………………………………………………………………4 5. INITIAL TURN-ON PROCEDURE ……………………………………………………….6 6. ADJUSTMENTS …………………………………………………………………………...6 Adjustment Procedure Chart, Table II …………………………………………….8...

  • Page 3: General Description

    GENERAL DESCRIPTION When ordered, the OC2-500 open chassis control can be supplied in a NEMA 12 enclosure. When supplied in this manner, the basic OC2-500 control is furnished with the following additional features, and is designated by model number OC2E- 500: Power “Off-On”...
  • Page 4 Voltage feedback, load changes are compensated for by an “IR” compensation circuit which senses any increase in armature current and raises the armature voltage to compensate for the increased voltage drop in the motor armature. This circuit thus controls the regulation (speed changes) due to load changes. The motor current is continuously monitored by a very low resistance current shunt.

  • Page 5: Control Specifications, Table I

    Four holes are provided in the base plate for mounting purposes. There is no preferred mounting position for the OC2-500 control. Four holes for mounting the OC2-500 should be drilled in the enclosure wall or sub-panel per the mounting dimension shown in A1501-100-DD (Figure 2).

  • Page 6: Mounting Of Enclosed Oc2E-500 Control

    Since the enclosure wall or sub-panel is actually used by the OC2-500 as a heat sink, it is necessary that the panel be of sufficient size to furnish adequate cooling. If a single OC2-500 is placed in an unventilated enclosure with no other heat-generating equipment, a 20”x20”...
  • Page 7 The field voltage supplied on the OC2-500 control is 200 VDC. A typical dual voltage field winding connection is shown below: Refer to the wiring information plate found on the motor, and connect field windings for the proper voltage of the OC2-500.

  • Page 8: Initial Turn-On Procedure

    If motor rotation is incorrect, turn power off at the AC disconnect and reverse the A1 and A2 connections to terminals A1 and A2 on 10TB of the OC2-500 control. If the motor runs at maximum seed with the potentiometer fully counterclockwise, and slows down as the potentiometer is rotated clockwise, the potentiometer is wired in backward.
  • Page 9 Characteristics of the particular motor used, and should there fore be made by the user when the drive is installed. Jobsite adjustment of “IR” is necessary to achieve specified regulation. The adjustments are permanent; periodic readjustment is not necessary. (The IR adjustment is set fully counter clockwise when using tachometer feedback.) Perform adjustments per Table II and in the order listed in Table II.

  • Page 12: Control Operation

    CONTROL OPERATION Prior to shipment, all OC2-500 and OC2E-500 controls are tested and completely adjusted at the Polyspede factory. Therefore, after properly wiring and following the “Initial Turn-On Procedure” section, the control should be functioning properly. If the motor speed cannot be controlled,...
  • Page 13 PAGE INTENTIONALLY LEFT BLANK...

  • Page 16: Troubleshooting Procedure - In Case Of Fuse Blowing

    TROUBLESHOOTING PROCEDURE – IN CASE OF FUSE BLOWING If fuses blow, a light bulb checkout procedure may be used without danger of damaging the control and without excessive fuse blowing during checkout. Proceed as follows: Turn power off at the source disconnect ahead of the control Connect two 120 volt, 100 watt bulbs in series with the ungrounded AC input line ( L1 ) Replace any blown control fuse(s) with a good fuse(s)
  • Page 17 Since these components are not recommended as field replaceable, the E1507 PC board should be replaced or the entire control should be returned to Polyspede factory for repair. If the bulb does not light, turn power off and reconnect the connections to10TB if they are presently not connected.

  • Page 18: Power Modules And D50 Testing

    POWER MODULES AND D50 TESTING The power module houses one SCR and one diode per module, in a configuration shown in Figure 5. Simple tests with an ohmmeter cannot conclusively show that an SCR or a rectifier is good, but shorted SCR’s or open or shorted rectifiers can be detected.

  • Page 19: Motor Tests

    CONTACTOR OPERATED SYSTEMS ( OPEN CHASSIS CONTROLS ONLY) In certain applications it may be necessary to start and stop the OC2-500 motor control through the use of a magnetic contactor. The contactor may be used to make and break the two AC lines, or it may break the two armature lines A1 and 11.1...

  • Page 20: Contactor Operation On The Dc Lines

    In custom-designed OC2 systems, Polyspede provides an anti-plugging relay, which senses CEMF due to motor rotation and electrically inhibits activation of any contactor until motor rotation ceases.

  • Page 21: Dynamic Braking (Open Chassis Controls Only)

    DYNAMIC BRAKING (OPEN CHASSIS CONTROL ONLY) In a contactor –reversed or high inertial system, it may be desirable to provide braking to cause rapid stopping of the motor and permit quicker reversing. If a power resistor is connected across the motor armature leads, A1 and A2, after the motor has been disconnected from the OC2 unit by contactor release, the motor will act as a generator and brake to a stop.

  • Page 22: Torque Programming

    Table IV gives the base speed and tachometer voltage ratings that will work with the board as designed. For some combinations, a resistor must be clipped from the board. For motor and tachometer combinations not covered in this manual, consult the Polyspede factory.
  • Page 23 Connect the tachometer leads so that the positive lead connects to terminal 9 (“TACH”) and the negative side to terminal 5 (“COM”). If the drive system is connected for reversing (open chassis control systems), the tachometer leads must be reversed when motor rotation is reversed so that terminal 9 is always positive in respect to common.

  • Page 24: Maintenance - Control

    Correct fuses to be used are listed in Table I on page 3 of this manual. MAINTENACE – MOTOR Motors supplied by Polyspede are rugged machines specifically designed for SCR controllers. There are no adjustments to make and maintenance is quite simple.
  • Page 25 Replace shaft seals at first sign of leakage, not only to avoid damage due to loss of lubricant, but also to eliminate the possible entrance of contaminants into housing If detailed instructions for assembly and disassembly of a particular unit are required, write the speed reducer factory for the information. If your drive is coupling a connected, and requires lubricating, the coupling should be checked on start-up and semiannually.

This manual is also suitable for:

Oc2e-500

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