Hope65 Series Smart AC Drive / VFD Digital Input Wiring Guide: NPN, PNP, Source/Sink, Two-Wire and Three-Wire Control

Slanvert Hope65 Series | Smidnya Digital Input Wiring Guide

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Hope65 Series Smart AC Drive / VFD Digital Input Wiring Guide

Deep wiring and setup guide for Hope65 DI terminals, NPN/PNP field devices, source/sink logic, J12 jumper selection, active-high/active-low input logic, two-wire control, three-wire control, jog, reset, external fault, and multi-speed commands.

DI1–DI5

Start / stop inputs

J12

Source / sink jumper

Input parameters

Digital Input Logic Map

External Command Path

SWITCH / PLC → DI → RUN

Wiring and F6 parameter must match

NPN / PNP / Source / Sink

Confirm before connecting PLC output

Two-Wire	Three-Wire
Active High	Active Low

Always prove keypad run before terminal run.

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Quick Answer

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Hope65 digital inputs are used for external RUN, forward, reverse, jog, reset, free stop, external fault, multi-speed selection, terminal UP/DOWN, and other ON/OFF command functions. Smaller Hope65S2 0.75–1.5 kW models provide DI1 to DI4, with DI4 usable as a high-speed pulse input. Larger Hope65GS2 2.2–5.5 kW and Hope65GT4 0.75–22 kW models provide DI1 to DI5, with DI5 usable as a high-speed pulse input.

If the motor runs from keypad but does not run from external terminals, check four items first: F0-21 command source, F6 DI function assignment, J12 source/sink jumper position, and DI active-high/active-low setting.

For reliable operation, use shielded DI cables where possible, keep digital input wiring short, avoid running DI wires with motor U/V/W cables, and confirm whether the external device is contact, relay, NPN, PNP, sinking output, or sourcing output before wiring.

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Safety Warning Before Digital Input Wiring

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Only trained and qualified electrical personnel should wire, modify, test, or troubleshoot Hope65 control terminals and panel control circuits.

Before touching wiring or terminals, switch off all input power, wait at least 10 minutes, and confirm that the DC bus voltage has discharged to a safe level. Do not change DI wiring while the drive or panel is energized.

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1. What This Article Helps You Do

This article explains how to wire and configure Hope65 Series Smart AC Drive / VFD digital input terminals. It is designed for technicians, panel builders, machine integrators, PLC engineers, and maintenance teams who need to start and stop the drive using external switches, push buttons, sensors, PLC outputs, or interlock circuits.

Digital input wiring is one of the most common reasons for field commissioning issues. A drive can be perfectly healthy and still refuse to start if the command source is wrong, the DI terminal function is not assigned, the source/sink jumper does not match the PLC output, or the active-high/active-low logic is inverted. This guide separates those issues step by step.

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Wire Correctly

Confirm contact, NPN, PNP, source, sink, internal 24V, or external 24V method before connecting DI.

Assign Function

Set the required F6 function for each DI: forward, reverse, jog, reset, fault, free stop, multi-speed, etc.

Select Logic

Set active-high or active-low and select two-wire or three-wire command mode to match the machine panel.

2. Applies To

Product Series	Slanvert Hope65 Series Smart AC Drive / VFD
Small Models	Hope65S2 / Hope65GS2 0.75 kW to 1.5 kW class models with DI1–DI4. DI4 can be used as high-speed pulse input.
Larger Models	Hope65GS2 2.2 kW to 5.5 kW and Hope65GT4 0.75 kW to 22 kW class models with DI1–DI5. DI5 can be used as high-speed pulse input.
Control Devices Covered	Selector switches, push buttons, relay contacts, PLC outputs, NPN sensors, PNP sensors, dry contacts, interlocks, external fault contacts, and jog/reset buttons.
User Level	Qualified electrical technician, panel builder, machine integrator, maintenance engineer, or automation engineer.

3. Digital Input Architecture

A Hope65 digital input command works only when the physical wiring, jumper setting, input function, active state, and command source all match each other.

Digital Input Command Chain

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01 Field Device Push button Selector switch PLC output NPN / PNP sensor	→	02 DI Terminal DI1 / DI2 DI3 / DI4 DI5 on larger models AI as DI if configured	→	03 F6 Logic Function assignment Active mode Input delay/filter Command mode

04 Command Source F0-21 terminal mode Keypad mode disabled for RUN Communication mode not selected	→	05 Drive Action Run forward Run reverse Jog Reset / stop / fault	Main Rule: If any one item in the command chain is wrong, the VFD may ignore the external command even though the wiring looks correct.

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4. DI Terminal Count by Model Type

Hope65 Model Group	Digital Inputs	High-Speed Pulse Input	Notes
Hope65S2 / Hope65GS2 0.75–1.5 kW	DI1, DI2, DI3, DI4	DI4	Use F6-00 to F6-03 for DI function assignment.
Hope65GS2 2.2–5.5 kW and Hope65GT4 0.75–22 kW	DI1, DI2, DI3, DI4, DI5	DI5	Use F6-00 to F6-04 for DI function assignment.

5. Common DI Function Assignments

Each DI terminal must be assigned a function in the F6 group. The same physical DI terminal can be used for different functions depending on the application.

Function Value	Function Name	Typical Use	Important Note
0	No function	Unused DI terminal.	Set unused terminals to no function to avoid accidental operation.
1	Forward run / run command	External start or forward command.	Must be matched with terminal command mode.
2	Reverse run / direction command	Reverse operation or direction selection.	Use only where reverse rotation is mechanically safe.
3	Three-wire operation control	Three-wire push-button station.	Requires terminal command mode set for three-wire logic.
4 / 5	Forward jog / reverse jog	Manual inching during setup or maintenance.	Confirm jog frequency and jog ramp before use.
6 / 7	Terminal UP / DOWN	Increase or decrease frequency from external buttons.	Equivalent to holding UP/DOWN command.
8	Free stop	Coast-to-stop command.	Machine may coast; not a replacement for safety-rated stop.
9	Fault reset	External reset button or PLC reset output.	Do not repeatedly reset before correcting fault cause.
10	Running pause	Pause running while retaining operation state.	Check sequence behavior before using in production.
11	External fault input	Fault input from another device or interlock.	Wrong active logic can create continuous E15/A15 fault.
12–15	Multi-segment command terminals	Preset speed or multi-step command selection.	DI combinations can select multiple speed states.

6. Source/Sink and NPN/PNP Wiring: What It Means

Source/sink wiring defines the direction of current flow through the digital input circuit. In the field, this usually appears as NPN or PNP sensor/PLC output wiring. The Hope65 uses jumper J12 PW to select the suitable source-type or sink-type digital input method.

Digital Input Source/Sink Overview

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Contact Control Uses dry contact, selector switch, push button, or relay contact. This is the simplest and recommended method for many panels.	NPN / Sink Output Device Common in PLC/sensor wiring where the device pulls the input path toward 0V/common when active.	PNP / Source Output Device Common in PLC/sensor wiring where the device supplies positive voltage to the input when active.
Important: NPN/PNP terminology can vary between field devices and regions. Always verify the PLC/sensor manual and check whether the output is sinking or sourcing before connecting to the VFD.

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7. J12 PW Jumper Selection

J12 is the key jumper for source/sink digital input wiring. The wrong jumper setting is a common cause of terminal start failure.

Jumper	Position	Function	Use Case
J12 PW	1–2	Source-type wiring method.	Factory-default style wiring method. Use when the field wiring method matches source-type input arrangement.
J12 PW	2–3	Sink-type wiring method.	Use when the field wiring method requires sink-type input arrangement.
J12 removed from PW/+24V link	External power supply wiring	Used when DI circuit is driven using external 24V supply.	Required in external power supply NPN/PNP wiring methods as per manual wiring approach.

J12 warning: Do not change J12 randomly. First confirm whether the external controller output is relay contact, NPN, PNP, sinking, or sourcing, and whether the VFD is using internal 24V or an external 24V supply.

8. Internal 24V vs External 24V Digital Input Wiring

Hope65 DI terminals can be controlled using the VFD’s internal 24V supply or an external 24V source depending on the panel design. The wiring method must not mix commons incorrectly.

Wiring Method	How It Works	When to Use	Risk If Wrong
Internal 24V + contact control	Uses VFD 24V/COM and external dry contacts to activate DI.	Simple push button, selector switch, relay contact, local panel control.	Wrong common or short circuit can prevent DI activation or damage control supply.
Internal 24V + NPN/PNP device	Uses Hope65 auxiliary 24V and a compatible sensor/PLC output method.	Small local field devices with compatible current requirement.	Wrong source/sink selection causes DI not to respond.
External 24V + NPN/PNP controller	Uses external panel 24V supply and common reference to control DI.	PLC panel, multi-device control, isolated control supply design.	If jumper/common is wrong, DI can stay always ON, always OFF, or behave erratically.

9. Active-High and Active-Low DI Logic

The DI terminal active mode determines whether a short-circuited/energized DI state is treated as valid or invalid. This is separate from the physical wiring method.

DI Active Mode	Meaning	Typical Symptom If Wrong
Active high	The DI terminal is valid when it is activated/short-circuited according to the selected wiring method.	If wiring expects active low, the command may not work until the contact state is reversed.
Active low	The DI terminal is valid when the corresponding signal is disconnected/inactive according to active-low setting.	Start/stop, external fault, or reset may appear inverted or continuously active.

Practical example: If an external fault input is configured as active-low but the field contact is wired normally open, the VFD may see the input as active when it should be inactive. Always match active mode with actual contact behavior.

10. Two-Wire Terminal Control

Two-wire control is common when the drive is controlled by maintained selector switches or PLC maintained outputs. The command remains active as long as the DI state remains active.

Two-Wire Mode 1: Forward / Reverse DI Control

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DI1

Forward running command.

DI2

Reverse running command.

Stop State

If both are OFF or both are ON at the same time, the VFD stops in this mode.

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Control Mode	DI1	DI2	Result
Two-wire mode 1	ON	OFF	Forward run
Two-wire mode 1	OFF	ON	Reverse run
Two-wire mode 1	OFF	OFF	Stop
Two-wire mode 1	ON	ON	Stop / invalid direction condition

11. Three-Wire Terminal Control

Three-wire control is used when the machine uses push buttons instead of maintained switches. In three-wire operation, one DI normally works as the enable/stop path, while other DI terminals provide momentary start/direction commands.

Three-Wire Mode	DI Arrangement	How It Works	Common Mistake
Three-wire mode 1	DI3 = enable / three-wire control, DI1 = forward, DI2 = reverse	Enable must remain active. Forward/reverse commands are accepted when the respective push button is pressed.	Enable/stop circuit is open, so start buttons do nothing.
Three-wire mode 2	DI3 = enable, DI1 = run command, DI2 = direction state	DI1 starts operation while DI2 determines direction according to its state.	Panel push-button wiring does not match selected three-wire logic.

12. Required Parameters for DI Terminal Control

Digital input wiring requires matching parameter setup. The exact parameter number differs slightly by model group, so confirm with the drive model and the manual.

Parameter / Group	Purpose	When to Check
F0-21	Selects command source: keypad, terminal, or communication.	Set to terminal command when DI terminals must start/stop the VFD.
F0-02	Selects frequency source.	Check when DI start works but motor speed remains 0 Hz.
F6-00 to F6-03	DI1 to DI4 function assignment for small 0.75–1.5 kW models.	Check when assigning forward, reverse, jog, reset, external fault, or multi-speed functions.
F6-00 to F6-04	DI1 to DI5 function assignment for larger models.	Check when assigning DI5 or pulse input functions on larger models.
DI active mode	Defines whether each DI is active-high or active-low.	Check when input behavior appears inverted or continuously active.
Terminal command mode	Selects two-wire mode 1, two-wire mode 2, three-wire mode 1, or three-wire mode 2.	Check when external start/stop wiring does not behave as expected.
DI filter time	Filters interference on DI terminals.	Increase carefully when DI terminals are disturbed by noise; longer filter slows response.
DI delay time	Adds response delay after DI signal is detected.	Use when sequence timing requires a deliberate delay.

13. AI1 Used as Digital Input

Hope65 allows AI1 to be used as a digital input through F6 parameter setup. This can be useful when additional DI logic is required, but it must be configured carefully.

AI1 as DI Item	Behavior	Use Carefully Because
AI1 terminal function selection	AI1 can remain analog input or be assigned a DI function.	If AI1 is used as DI, it is no longer available as the normal analog speed input.
AI1 voltage threshold	AI1 is treated as high level above approximately 7V and low level below approximately 3V, with hysteresis between the two.	A floating or noisy voltage may cause unstable DI status.
AI1 as DI valid state	Can be set active-high or active-low.	Wrong valid-state setting can invert the command.

14. DI Cable Routing and Noise Prevention

Digital input wiring is more noise-tolerant than analog wiring, but it can still be affected by motor cable noise, poor grounding, long cable runs, inductive loads, and incorrect control common wiring.

Wiring Practice	Recommendation	Issue Prevented
Cable type	Use shielded cable where possible.	False DI triggering and noise-related command behavior.
Cable length	Keep digital input wiring short, ideally not more than 20 m.	Signal pickup, delay, and unstable status.
Cable route	Do not route DI wiring with input power cable or U/V/W motor cable.	Random start/stop, false reset, external fault, or multi-speed switching.
Power crosstalk filtering	Use proper filtering when active drive mode is affected by power supply crosstalk.	False trigger from noisy 24V control supply.
DI filter time	Increase carefully only when site interference is confirmed.	Noise triggering while preserving response time.

15. Common DI Wiring Problems and Corrective Actions

Problem	Likely Cause	Corrective Action
Motor runs from keypad but not from DI start	F0-21 not set to terminal command, DI function not assigned, or terminal mode mismatch.	Set command source to terminal, assign DI run function, and select correct two-wire/three-wire mode.
DI status does not change	Wrong common, J12 mismatch, NPN/PNP mismatch, no 24V supply, or broken contact.	Verify voltage/common, check J12, confirm field device output type, and test with dry contact if safe.
Drive starts when switch is OFF	Active-high/active-low logic inverted or contact type wrong.	Correct DI active mode or change NO/NC wiring logic according to the machine design.
External fault remains active	External fault DI set active-low/active-high incorrectly, or interlock contact is open.	Check DI function value, active mode, interlock contact, and PLC output status.
DI command flickers or changes randomly	Noise pickup, long cable, poor shielding, common reference problem, or cable routed with motor wires.	Separate cable route, use shielded cable, check 24V common, and increase DI filter time if required.
Both forward and reverse commands stop the drive	Two-wire mode 1 sees both DI1 and DI2 active at the same time.	Modify PLC logic or selector switch wiring so only one direction command is active at a time.

16. DI Commissioning Checklist

Use this checklist before releasing the machine for production.

Confirm main power wiring and motor wiring are correct.
Run the motor from keypad at low frequency first.
Confirm the required external control method: contact, relay, PLC, NPN, or PNP.
Confirm whether the VFD uses internal 24V or external 24V for DI wiring.
Set J12 according to the required source/sink wiring method.
Assign DI terminal functions in the F6 group.
Set DI active-high or active-low logic correctly.
Select two-wire or three-wire terminal command mode according to panel wiring.
Set F0-21 to terminal command only after keypad testing succeeds.
Set F0-02 frequency source correctly, especially if terminal start and analog speed are used together.
Check each DI input status one by one before connecting the machine load.
Test forward, reverse, jog, reset, external fault, and stop functions individually.
Check that the machine cannot start unexpectedly after reset or power restoration.
Secure wiring, close covers, and update the panel wiring diagram.

17. Do Not Do These During DI Wiring

Do not wire DI terminals while the VFD or panel is powered.
Do not assume NPN/PNP type from wire color alone.
Do not change J12 without confirming source/sink wiring requirement.
Do not run DI cables in the same duct as U/V/W motor cables.
Do not use terminal stop as the only safety-rated emergency stop system.
Do not assign unused DI terminals to active functions.
Do not repeatedly reset faults through DI reset before correcting the cause.
Do not use reverse DI unless the machine is safe for reverse rotation.
Do not use active-low external fault logic without confirming NO/NC contact behavior.
Do not move from keypad test to terminal control until the motor runs correctly from keypad.

18. Stop and Contact Technical Support If

The motor runs from keypad but does not respond to DI after command source and F6 settings are checked.
The DI status appears inverted even after active mode is corrected.
The PLC output type is unknown or panel documentation is missing.
DI status flickers during motor operation despite shielded cable and separate routing.
External fault remains active and the source cannot be identified.
The machine uses hoist, lift, crane, vertical load, safety interlock, or emergency stop logic.
There is suspected control board damage, burning smell, visible damage, or abnormal heating.
You are unsure whether the wiring is using internal or external 24V supply.

19. Information to Share With Technical Support

To reduce troubleshooting time, share the following information:

Photo of Hope65 drive nameplate
Photo of control terminal wiring
Photo showing J12 jumper position
Model and power rating of the Hope65 drive
Whether the motor runs from keypad at 5 Hz to 10 Hz
F0-21 command source setting
F0-02 frequency source setting
DI function settings from F6 group
Terminal command mode: two-wire mode 1, two-wire mode 2, three-wire mode 1, or three-wire mode 2
DI active-high/active-low setting
Type of external command device: dry contact, relay, PLC, NPN sensor, PNP sensor, sinking output, or sourcing output
Whether internal 24V or external 24V is used
Measured voltage between DI terminal and common in ON and OFF state
Fault code shown on keypad, if any
Whether the issue occurs during start, stop, reverse, jog, reset, or external fault condition

Need Help With Hope65 Digital Input Wiring?

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Smidnya technical support can help review your DI wiring, J12 source/sink jumper position, PLC output type, F6 terminal settings, two-wire/three-wire command mode, and active-high/active-low logic before commissioning.

Share DI wiring photo + J12 position + F0-21/F6 settings for faster support

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20. Related Articles

Hope65 Series Smart AC Drive / VFD Control Terminal Wiring Guide
Hope65 Series Smart AC Drive / VFD Motor Not Running: Step-by-Step Troubleshooting
Hope65 Series Smart AC Drive / VFD Standard Power Wiring Guide
Hope65 Series Smart AC Drive / VFD Potentiometer and Analog Speed Control Guide
Hope65 Series Smart AC Drive / VFD RS485 Modbus Communication Setup
Hope65 Series Smart AC Drive / VFD Fault Codes: Meaning, Causes, and Corrective Actions

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