Danfoss Q625A Remote Setpoint Module Owner’s Manual

Danfoss Q625A Remote Setpoint Module

Product Information

Specifications

• Part Number: Q625A
• Description: Remote Setpoint Module
• Models: Hand-Held Model, Panel-Mount Model
• Feature: Slope roll-off (optional)

FAQ

• Q: What is the purpose of the slope roll-off feature?
• A: The slope roll-off feature helps prevent system reactions triggered by the highly sensitive slope sensor, ensuring stability in setpoint adjustments.

Revision history

Table of revisions

Product Overview

Description

1. Hand-Held Model;
2. Panel-Mount Model

The Q625A remote setpoint is designed for use with the W894A Proportional Level Controller or the R7232A Proportional Indicating Controller. When connected to either controller, the slope setpoint is adjustable to ±9.5% slope. Two models of the Q625A are available. The hand-held version has a coiled cord and MS connector for hook-up. A panel-mount version mounts in a panel and provides a terminal strip for hook-up. Both Q625A models are available with a slope roll-off circuit, which functions as a filter to reduce gain at frequencies above 3 Hz, for use on equipment with high vibration and shock levels.

Features

• Spring-Loaded Hanger
  • The hand-held model easily clips to the railing, pipes, bars, etc., to permit extensive freedom of movement for the operator about the machine.
• Adjustable Dial
  • The clutch in the dial permits adjustment of the dial to the potentiometer. With this feature, the zero can be used as a reference for any off-level condition.
• Optional Slope Roll-Off Circuit
  • High mechanical vibration and shock levels of the machine are effectively shunted by the roll-off circuit to prevent system reaction initiated by the highly sensitive slope sensor.
• Slip Clutch
  • Prevents damage to the potentiometer when the end of travel is reached.
• Rugged Aluminum Housing
  • Shock and vibration resistant. Mounts in any orientation without affecting operation. Resists corrosion, moisture, and other damaging environmental effects.
• Easy To Install
  • MS connector on hand-held model plugs in and screws tight. Four connections to the terminal strip on the panel-mount model; mounts on a flat surface 76.2 mm by 152.4 mm (3 by 6 in) or larger.
• High Resolution
  • Gear train provides a reduction between the setpoint crank and the read-out dial. One complete turn of the crank changes the setpoint by 0.1% slope.

Ordering information

Specifications

Slope roll-off (optional)

Accessory for Panel-Mount Model

The kit (part number KW01001) provides all necessary wiring connections between the panel-mount Q625A and the R7232A with MS connectors or the W894A. The cable comes completely assembled with an MS connector on one end; and spade lugs on the other end.

Replacement part for Hand-Held Model

Technical data

Performance

Setpoint range
Adjustable to ± 9.5% slope. One revolution of the crank changes the setpoint 0.1% slope.

Resistance
2500 ± 5 ohms between A and C of the connector or terminal strip. The resistance between A and B increases when the hand crank is rotated clockwise. See Resistance versus dial position

Slope roll-off circuit effects
The slope roll-off circuit acts as a filter to reduce slope system gain by 14 db at mechanical vibration frequencies above 3 Hz.

Centering accuracy
The potentiometer centring to dial zero position will be accurate to within ± 0.10%.

Hysteresis
The hand crank to dial hysteresis including back-lash will be less than 0.08% slope.
Slope accuracy
After adjusting the zero dial setting to coincide with the electrical midpoint of the device, the accuracy at any dial setting within ± 5% slope shall be within ± 0.14% of absolute slope. Accuracy outside of ± 5% slope will be within ± 0.20% of absolute slope.

Torque

Resistance versus dial position

1. Setpoint range
2. Resistance between pins/terminals A and B in ohms
3. Dial indication

Environmental

Vibration
Withstands a vibration test designed for mobile equipment devices that includes two parts:

1. Cycling from 5 to 2000 Hz over a range of +1.5 g to +3.0 g. The cycling test is performed on each of the three major axes.
2. Resonance dwells for one million cycles over a range of +1.5 g to +3.0 g for each of the three major axes. Acceleration level varies with frequency.

Shock
Withstands a shock test for mobile equipment devices that consists of three shocks of 50 g and 11 ms duration in both directions of the three major axes for a total of 18 shocks.
Temperature

Weight

Installation

Hand-held model

• Hand-held Q625A does not require mounting due to a spring-return hanger design for suspending the remote setpoint in any convenient location.
• Hand-held model mounting dimensions in millimetres [inches]

Panel-mount model

Panel-mount Q625A requires clearance holes. Reference Panel-mount model mounting.
Clearance behind the panel for the device should be at least 50.80 mm (2.00 in).

1. Drill 4.763 mm (3/16 in) clearance holes.
2. Remove the nuts from the threaded studs at the back of the front plate.
3. Insert the studs through the clearance holes.
4. Replace the nuts from the back of the panel.

Panel-mount model mounting dimensions in millimetres [inches]

Panel-mount model mounting
Panel cut-out dimensions and mounting hole locations in millimetres [inches]

Wiring

Hand-held model
Hand-held Q625A has an integral 0.610 mm (2.00 ft) coiled cable with an MS connector that plugs directly into the R7232A or W894A.
If an R7232A with terminal strips is to be used in conjunction with the hand- held Q625A, connect the amplifier to a Bendix MS3102A16S-8P receptacle (Danfoss part number K03992). Wire the receptacle to the corresponding letters on the R7232A terminal strip, and mount to the panel, reference Connection diagram

Panel-mount model
Panel-mount Q625A has terminal strips for wiring connections, reference Connection diagram.
If an R7232A with MS connectors or W894A is to be used in conjunction with the panel-mount Q625A, order cable assembly (Danfoss part number KW01001). The cable assembly includes spade lugs at one end and an MS connector at the other end to provide all necessary wiring for the panel-mount Q625A.

Connection diagram

is equipped with a roll-off circuit.
2| Bendix type MS3102A16S-8P connector (Danfoss part number K03992)| If a hand-held remote setpoint Q625A is used, connect the amplifier to a Bendix type MS3102A16S-8P, A, B, C, D to A, B, C, D respectively and mount on the panel.
3| Q625A panel mount remote setpoint
4| MCV113 servovalve for level control| The R7232 will operate one MCV113 servo valve for either rotary position or level control, but not both at the same time.
5| MCV113 service for rotary position control
6| 11 to 15 Vdc input|
7| SB104 or KS10201 sensor|

Troubleshooting

The Q625A will provide extended, trouble-free operation and should not need servicing under normal operating conditions. Be sure the Q625A is malfunctioning before replacing it.

1. Check all wires looking for cuts or evidence of pinching.

2. Check if connector spade lugs have been disconnected.

3. If a VOM is available, check resistance between Pins/Terminals A and C for 2500 ohms or 9400 ohms, depending on the model. Check continuity between Pins/Terminals A and B, and B and C while rotating the hand crank.
   Resistance should approximate the values shown in the Resistance versus dial position drawing and reference Internal workings.

4. Reduce the sensitivity or gain of the controller to eliminate the oscillation.
   If the Q625A has a slope roll-off circuit and the equipment or machine control appears to be unstable or oscillates, the roll-off circuit may be at fault.

5. If a VOM is available, check the slope roll-off circuit (reference Internal workings.

   • Place the output leads of the VOM across Pins/ Terminals B and D of the MS connector or terminal strip.
     A reading of 1500 ohms should be found on the R x 100 scale. If the capacitor is shorted the VOM will read 500 ohms.

   • Switch the VOM to the R x 10,000 scale. Reverse polarity on the VOM.
     Charging of the capacitor should be seen on the meter.

6. If another Q625A is available, connect it in place of the existing one.

   • Change the slope setpoint and observe the operation.
     If the replacement Q625A corrects the malfunction, replace the original unit.

7. Check if the servo-valve, controller, and sensor are operating.

Internal workings

1. Resistor R1 is a high resistance value selected to increase the accuracy of the potentiometer.
2. Roll-off circuit (roll-off is optional)

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Danfoss Power Solutions is a global manufacturer and supplier of high- quality hydraulic and electronic components. We specialize in providing state- of-the-art technology and solutions that excel in the harsh operating conditions of the mobile off-highway market. Building on our extensive application expertise, we work closely with our customers to ensure exceptional performance for a broad range of off-highway vehicles.

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References

• Inverter, Solar Inverter, Home Power Inverter | inverter.com
• Danfoss Power Solutions – Explore our power solutions | Danfoss
• Danfoss Power Solutions – Explore our power solutions | Danfoss
• Daikin Sauer Danfoss - Home
• Engineering Tomorrow | Danfoss
• Hydro-Gear Drivetrain Solutions | Home
• Danfoss Power Solutions – Explore our power solutions | Danfoss
• Danfoss Power Solutions – Explore our power solutions | Danfoss

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