0384464 STARTER HOUSING ASSY. JOHNSON
20R71S, 20R72R, 20R73A, 25E72R, 25E73A, 25R71S
STARTER
Price: query
Rating:
Number on catalog scheme: 1
BRP JOHNSON entire parts catalog list:
- REWIND STARTER » 0384464
20R73A, 20RL73A 1973
25E72R, 25EL72R, 25R72R, 25RL72R 1972
25E73A, 25EL73A, 25R73A, 25RL73A 1973
25R71S, 25RL71S 1971
Information:
Unpacking
Before handling the control, read Chapter 2, Electrostatic Discharge Awareness. Be careful when unpacking the electronic control. Check the control for signs of damage such as bent panels, scratches, and loose or broken parts. If any damage is found, immediately notify the shipper.Power Requirements
The high-voltage versions of the 701 Digital Speed Control require a voltage source of 88 to 132 Vac 45 to 65 Hz or 90 to 150 Vdc. The low-voltage versions require a voltage source of 18 to 40 Vdc.
To prevent damage to the control, do not exceed the input voltage range.
If a battery is used for operating power, an alternator or other battery-charging device is necessary to maintain a stable supply voltage.
To prevent damage to the control, make sure that the alternator or other battery-charging device is turned off or disconnected before disconnecting the battery from the control.
Location Considerations
Consider these requirements when selecting the mounting location:* adequate ventilation for cooling;* space for servicing and repair;* protection from direct exposure to water or to a condensation-prone environment;* protection from high-voltage or high-current devices, or devices which produce electromagnetic interference;* avoidance of vibration;* selection of a location that will provide an operating temperature range of -40 to +70 °C (-40 to +158 °F).The control must NOT be mounted on the engine.Electrical Connections
External wiring connections and shielding requirements for a typical control installation are shown in the plant wiring diagram, Figure 1-3. The plant wiring connections are explained in the rest of this chapter.Shielded Wiring
All shielded cable must be twisted conductor pairs. Do not attempt to tin the braided shield. All signal lines should be shielded to prevent picking up stray signals from adjacent equipment. Connect the shields to the nearest chassis ground. Wire exposed beyond the shield should be as short as possible, not exceeding 50 mm (2 inches). The other end of the shields must be left open and insulated from any other conductor. DO NOT run shielded signal wires along with other wires carrying large currents. See Woodward application note 50532, Interference Control in Electronic Governing Systems for more information.Where shielded cable is required, cut the cable to the desired length and prepare the cable as instructed below.1. Strip outer insulation from BOTH ENDS, exposing the braided or spiral wrapped shield. DO NOT CUT THE SHIELD.2. Using a sharp, pointed tool, carefully spread the strands of the shield.3. Pull inner conductor(s) out of the shield. If the shield is the braided type, twist it to prevent fraying.4. Remove 6 mm (1/4 inch) of insulation from the inner conductors.Installations with severe electromagnetic interference (EMI) may require additional shielding precautions. Contact Woodward Governor Company for more information.Power Supply
Power supply output must be low impedance (for example, directly from batteries). DO NOT power low-voltage versions of the control from high-voltage sources with resistors and zener diodes in series with the control power input. The 701 control contains a switching power supply which requires a current surge to start properly.
To prevent damage to the control, do not power low-voltage versions of the control from high-voltage sources.
Run the power leads directly from the power source to the control. DO NOT POWER OTHER DEVICES WITH LEADS COMMON TO THE CONTROL. Avoid long wire lengths. Connect the positive (line) to terminal 1 and negative (common) to terminal 2. If the power source is a battery, be sure the system includes an alternator or other battery-charging device.If possible, do NOT turn off control power as part of a normal shutdown procedure. Use the Minimum Fuel discrete input (terminal 9) for normal shutdown. Leave the control powered except for service of the system and extended periods of disuse.
Do NOT apply power to the control at this time. Applying power may damage the control.
To prevent damage to the engine, apply power to the 701 control at least ten seconds prior to starting the engine. The control must have time to do its power up diagnostics and become operational. Do not start the engine if the diagnostic tests fail, because test failure turns off the output of the control.
Actuator Output
The actuator wires connect to terminals 3(+) and 4(-). Use shielded wires with the shield connected to chassis at the control.Aux Output
The tachometer or actuator position readout wires connect to terminals 5(+) and 6(-). Use shielded twisted-pair wires. For an electrically isolated input device such as a 4 to 20 mA input analog meter, the shield should be grounded at the control end of the cable. For input to other devices, use the recommendation of the device manufacturer.
To prevent possible damage to the control or poor control performance resulting from ground loop problems, follow these instructions. The control common is electrically isolated from the power supply input; however, the actuator and aux outputs are current sources and have a common mode voltage on them with respect to the control's internal common (terminal 7 - Aux Common). The analog inputs to the control use this same common. Connecting the actuator or aux outputs to external circuits that are not isolated from the remote speed setting 4 to 20 mA current source will create ground loop problems. We recommend using current-loop isolators if the 701 control's analog inputs and outputs must both be used with non-isolated devices. A number of manufacturers offer 20 mA loop isolators. Consult Woodward Governor Company for further information.
Discrete Inputs
Discrete inputs are the switch input commands to the 701 control. In low voltage systems, or other systems where nominal 24 Vdc is available, the discrete inputs should be powered by this external voltage.If you are using the control-supplied aux voltage, which is recommended only for high voltage systems where 24 Vdc is not available, jumper terminal 7 to terminal 8. This connects the control's common to the discrete input common. Terminal 5 then supplies power (approximately +21 Vdc) to the discrete inputs. Since the aux voltage is not isolated from other control circuits, use only isolated contacts (dry or signal voltage rated) for the discrete circuits. DO NOT POWER ANY OTHER DEVICES WITH THE
Before handling the control, read Chapter 2, Electrostatic Discharge Awareness. Be careful when unpacking the electronic control. Check the control for signs of damage such as bent panels, scratches, and loose or broken parts. If any damage is found, immediately notify the shipper.Power Requirements
The high-voltage versions of the 701 Digital Speed Control require a voltage source of 88 to 132 Vac 45 to 65 Hz or 90 to 150 Vdc. The low-voltage versions require a voltage source of 18 to 40 Vdc.
To prevent damage to the control, do not exceed the input voltage range.
If a battery is used for operating power, an alternator or other battery-charging device is necessary to maintain a stable supply voltage.
To prevent damage to the control, make sure that the alternator or other battery-charging device is turned off or disconnected before disconnecting the battery from the control.
Location Considerations
Consider these requirements when selecting the mounting location:* adequate ventilation for cooling;* space for servicing and repair;* protection from direct exposure to water or to a condensation-prone environment;* protection from high-voltage or high-current devices, or devices which produce electromagnetic interference;* avoidance of vibration;* selection of a location that will provide an operating temperature range of -40 to +70 °C (-40 to +158 °F).The control must NOT be mounted on the engine.Electrical Connections
External wiring connections and shielding requirements for a typical control installation are shown in the plant wiring diagram, Figure 1-3. The plant wiring connections are explained in the rest of this chapter.Shielded Wiring
All shielded cable must be twisted conductor pairs. Do not attempt to tin the braided shield. All signal lines should be shielded to prevent picking up stray signals from adjacent equipment. Connect the shields to the nearest chassis ground. Wire exposed beyond the shield should be as short as possible, not exceeding 50 mm (2 inches). The other end of the shields must be left open and insulated from any other conductor. DO NOT run shielded signal wires along with other wires carrying large currents. See Woodward application note 50532, Interference Control in Electronic Governing Systems for more information.Where shielded cable is required, cut the cable to the desired length and prepare the cable as instructed below.1. Strip outer insulation from BOTH ENDS, exposing the braided or spiral wrapped shield. DO NOT CUT THE SHIELD.2. Using a sharp, pointed tool, carefully spread the strands of the shield.3. Pull inner conductor(s) out of the shield. If the shield is the braided type, twist it to prevent fraying.4. Remove 6 mm (1/4 inch) of insulation from the inner conductors.Installations with severe electromagnetic interference (EMI) may require additional shielding precautions. Contact Woodward Governor Company for more information.Power Supply
Power supply output must be low impedance (for example, directly from batteries). DO NOT power low-voltage versions of the control from high-voltage sources with resistors and zener diodes in series with the control power input. The 701 control contains a switching power supply which requires a current surge to start properly.
To prevent damage to the control, do not power low-voltage versions of the control from high-voltage sources.
Run the power leads directly from the power source to the control. DO NOT POWER OTHER DEVICES WITH LEADS COMMON TO THE CONTROL. Avoid long wire lengths. Connect the positive (line) to terminal 1 and negative (common) to terminal 2. If the power source is a battery, be sure the system includes an alternator or other battery-charging device.If possible, do NOT turn off control power as part of a normal shutdown procedure. Use the Minimum Fuel discrete input (terminal 9) for normal shutdown. Leave the control powered except for service of the system and extended periods of disuse.
Do NOT apply power to the control at this time. Applying power may damage the control.
To prevent damage to the engine, apply power to the 701 control at least ten seconds prior to starting the engine. The control must have time to do its power up diagnostics and become operational. Do not start the engine if the diagnostic tests fail, because test failure turns off the output of the control.
Actuator Output
The actuator wires connect to terminals 3(+) and 4(-). Use shielded wires with the shield connected to chassis at the control.Aux Output
The tachometer or actuator position readout wires connect to terminals 5(+) and 6(-). Use shielded twisted-pair wires. For an electrically isolated input device such as a 4 to 20 mA input analog meter, the shield should be grounded at the control end of the cable. For input to other devices, use the recommendation of the device manufacturer.
To prevent possible damage to the control or poor control performance resulting from ground loop problems, follow these instructions. The control common is electrically isolated from the power supply input; however, the actuator and aux outputs are current sources and have a common mode voltage on them with respect to the control's internal common (terminal 7 - Aux Common). The analog inputs to the control use this same common. Connecting the actuator or aux outputs to external circuits that are not isolated from the remote speed setting 4 to 20 mA current source will create ground loop problems. We recommend using current-loop isolators if the 701 control's analog inputs and outputs must both be used with non-isolated devices. A number of manufacturers offer 20 mA loop isolators. Consult Woodward Governor Company for further information.
Discrete Inputs
Discrete inputs are the switch input commands to the 701 control. In low voltage systems, or other systems where nominal 24 Vdc is available, the discrete inputs should be powered by this external voltage.If you are using the control-supplied aux voltage, which is recommended only for high voltage systems where 24 Vdc is not available, jumper terminal 7 to terminal 8. This connects the control's common to the discrete input common. Terminal 5 then supplies power (approximately +21 Vdc) to the discrete inputs. Since the aux voltage is not isolated from other control circuits, use only isolated contacts (dry or signal voltage rated) for the discrete circuits. DO NOT POWER ANY OTHER DEVICES WITH THE
Parts starter JOHNSON:
0384124
0384124 STARTER PULLEY AND PIN
20R70C, 20R71S, 20R72R, 20R73A, 25E72R, 25E73A, 25E74M, 25E75B, 25E76E, 25E77S, 25E78C, 25E79R, 25R70C, 25R71S, 35E76G, 35E77C, 35E78R, 35E79A, J25RCSA, J35ECSM
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