Feimu Technology Company has specially prepared a "commander of execution" - the Siemens 6ES7288-5AQ01-0AA0 analog expansion module - for overseas automation control engineers and equipment maintenance experts in this small PLC control system in China. When conducting projects or maintaining equipment, people often encounter situations where precise control of the frequency of the frequency converter, adjustment of the valve opening, or control of the heating temperature is required. In such cases, relying solely on ordinary digital signals is not sufficient; a module that can output continuous changing signals must be used. We recommend this classic analog output module from the S7-200 SMART series to you, in order to enable your control system to have fine adjustment capabilities and completely get rid of the troubles caused by unstable product quality due to rough signal control.
The greatest advantage of our 6ES7288-5AQ01-0AA0 module is "new appearance" and "uninjured terminals". Many second-hand modules have marks of twisted terminals, and even the copper strips inside have oxidized and turned black, making it difficult to make good electrical connections. The goods we supply are all cleaned of terminals before shipment, and the screws are checked to ensure they are smooth. When you receive it, it will look neat and professional. You can connect the wires and debug it right away, without worrying about signal fluctuations caused by poor contact.
This module is used in an extremely wide range of applications. The most common ones include frequency control of variable frequency water supply systems, temperature control valves for central air conditioning, and servo control for packaging machinery. In any situation that requires analog output, PID regulation, or open-loop control, this Siemens 6ES7288-5AQ01-0AA0 is definitely the main force. It is the "voice" of the control system, converting the instructions from the brain into actual physical actions.
|
Product Model |
Siemens 6ES7288-5AQ01-0AA0 |
|
Product Series |
S7-200 SMART Expansion Module |
|
Module Type |
Analog Output Module (EM AQ01) |
|
Number of Output Channels |
2 Analog Outputs |
|
Output Signal Type |
Voltage (±10V) or Current (0-20mA) |
|
Resolution |
12-bit (Voltage Mode) / 11-bit (Current Mode) |
|
Conversion Time |
< 300 μs (Per Channel) |
|
Isolation Method |
Photoelectric Isolation |
|
Wiring Method |
Pluggable Screw Terminal |
Each Siemens 6ES7288-5AQ01-0AA0 module from Feimu Technology has multiple authenticity markers. Check these points before installation.
| Inspection Point | What to Look For | Reject If |
|---|---|---|
| Siemens logo on front face | Laser etched. Crisp edges. Even letter spacing. | Faded, blurry, or painted on. |
| Serial number label | White label on top edge. 12 characters. Font matches Siemens standard. | Label missing. Numbers smudged or hand-written. |
| Cardboard box | Siemens logo printed in red. Clear plastic seal intact. | Seal broken. Box has third-party stickers. |
| Internal tray | Gray plastic formed tray. Module sits snugly. | Loose in bubble wrap. No tray present. |
| Terminal block | Screw terminals shiny. No scratches or tool marks. | Terminals tarnished. Screws rusted or stripped. |
Step-by-step verification: First, check the box seal. Second, open and look for the plastic tray. Third, remove the module and compare the serial number on the module with the number on the box label. Both must match exactly. Fourth, inspect the terminal block for shine and no tool marks. If any point fails, photograph the issue and email us before installing. We respond within 12 hours.
Analog signals are sensitive to electrical noise. Incorrect wiring causes signal drift, fluctuating readings, and unstable control. Follow these rules for the 6ES7288-5AQ01-0AA0.
| Wiring Rule | Requirement | Why This Matters |
|---|---|---|
| Use shielded cable | Twisted pair with overall foil shield. Belden 8760 or equivalent. | Shield blocks electrical noise from motors and drives. |
| Ground shield at one end only | Connect shield to ground terminal at the PLC end. Leave unconnected at the field device end. | Grounding both ends creates a ground loop. Noise travels through the shield. |
| Separate from power cables | Keep analog cables at least 10cm away from 220V AC or motor cables. | Induced voltage from power cables corrupts analog signal. |
| Wire gauge | 0.5mm² to 1.0mm² (20 to 18 AWG). Stranded copper only. | Thin wire breaks easily. Thick wire damages terminals. |
| Strip length | 8mm. Insert fully into terminal cage. | Too short makes poor contact. Too long risks short to adjacent terminal. |
Voltage output wiring (0-10V or ±10V): Connect the signal wire to the positive terminal (V). Connect the return wire to the negative terminal (COM). If the receiving device has a differential input, connect COM to the input negative. If the receiving device has a single-ended input, connect COM to the device ground.
Current output wiring (0-20mA or 4-20mA): Connect the positive wire to the I terminal. Connect the negative wire to COM. Current loop does not require a return to PLC ground. The loop provides its own return path.
Field failure example: A customer in Turkey used unshielded cable for a 4-20mA signal to a variable frequency drive. The drive speed fluctuated randomly. The PLC output showed stable 12mA, but the drive read between 9mA and 15mA. Cause: Electrical noise from the drive's own power cables induced into the unshielded analog cable. Fix: Replaced with shielded cable. Grounded shield at PLC end only. The speed stabilized immediately.
The Siemens 6ES7288-5AQ01-0AA0 supports multiple output ranges. The correct setting depends on the receiving device. Use this table to match the output range to your application.
| Output Range | Resolution | Digital Value Range in PLC | Typical Application |
|---|---|---|---|
| 0V to 10V | 12-bit (4,096 steps) | 0 to 27,648 | Valve position control. Simple drive speed reference. |
| ±10V | 12-bit (4,096 steps) | -27,648 to 27,648 | Bidirectional motor control. Reversing valve position. |
| 0mA to 20mA | 11-bit (2,048 steps) | 0 to 27,648 | Older analog devices. Current loop transmitters. |
| 4mA to 20mA | 11-bit (2,048 steps) | 5,529 to 27,648 | Frequency drive speed control. Pressure and flow transmitters. Most common industrial standard. |
How to set the range: Open STEP 7-MicroWIN SMART. Go to System Block. Select the analog output module. Choose the range for each channel. Download the configuration to the PLC. The PLC does not detect range changes automatically. You must run this step after adding the module.
Resolution explained: A 12-bit resolution means the analog output signal divides into 4,096 steps. For a 0-10V range, each step equals 10V ÷ 4096 = 0.00244V. A 4-20mA range with 11-bit resolution divides into 2,048 steps over the 16mA span. Each step equals 16mA ÷ 2048 = 0.0078mA. This is sufficient for most industrial control applications.
The 6ES7288-5AQ01-0AA0 occupies one output word in the PLC memory. Channel assignment follows a fixed pattern based on module position.
| Module Position | First Channel Address | Second Channel Address |
|---|---|---|
| First analog module (slot 0 after CPU) | AQW0 | AQW2 |
| Second analog module | AQW4 | AQW6 |
| Third analog module | AQW8 | AQW10 |
Programming example (S7-200 SMART, LAD language):
Goal: Output 8mA from a 4-20mA loop to control a variable frequency drive at 50% speed.
Step 1: The 4-20mA range corresponds to digital values 5,529 (4mA) to 27,648 (20mA).
Step 2: 8mA is 25% of the 4-20mA span. Calculation: 5,529 + (27,648 - 5,529) x 0.25 = 11,058.
Step 3: Write the value 11,058 to AQW0 using a MOV-W instruction.
Step 4: If the drive speed must change with a sensor reading, use the Scale (SCALE) instruction. Input the raw sensor value. Scale it to the output range. This avoids manual calculation.
Common programming mistake: Writing a value above 27,648 or below 5,529 for 4-20mA range. The PLC does not clip the value. The output will not follow the programmed range. Always check that the digital value stays within the valid range for your selected output configuration.
Analog output modules drift over time. Temperature changes and component aging affect the output value. Perform these checks every 6 to 12 months.
| Check Item | Method | Acceptable Range | Action If Out of Range |
|---|---|---|---|
| Terminal screw tightness | Use small screwdriver. Turn each screw a quarter turn. | Screw does not turn further. | Loose screw causes intermittent signal. Tighten gently. |
| Channel 1 output accuracy | Force 12mA (or 5V). Measure with multimeter at the field device end. | Target ±0.1mA (or ±0.05V) | If beyond 0.3mA error, note the offset. Adjust in PLC program or replace module if error grows over time. |
| Channel 2 output accuracy | Same as Channel 1. Force and measure. | Target ±0.1mA (or ±0.05V) | Same action as Channel 1. |
| Noise on output signal | View signal on oscilloscope. Or check for random drive speed changes without command change. | No visible ripple above 50mV | Check shield grounding. Separate analog cables from power cables. Replace cable if damaged. |
Test procedure: Place the PLC in STOP mode. Use the System Block to set a fixed value for each analog output channel. Measure at the terminal block with a multimeter. Record the reading. Compare to the expected value based on your output range. If the error exceeds 0.3mA for current output or 0.1V for voltage output, the module may need calibration or replacement. Contact Feimu technical support with your measurement records.
When to replace the module: Output no longer reaches the full range (stuck at 8mA when 20mA is commanded). Output jumps randomly without command change. PLC reads correct in software but field device receives wrong value. These indicate internal component failure. Replacement is more cost-effective than field repair.
Feimu Technology operates from Jiangmen City, Guangdong Province, China. The company was founded in 2005 and has supplied automation components to customers in over 30 countries.
Contact information:
Email: sales@feimutech.com
WhatsApp: +86 13358323579
Website: www.feimuplc.com
Response time: Within 24 hours. Technical questions typically answered within 12 hours. Please include your module serial number and a description of the issue when contacting.
Q: Can this module be compatible with the Siemens S7-200 SMART series PLC?
A: The Siemens 6ES7288-5AQ01-0AA0 can fully accommodate all PLCs of the S7-200 SMART series. No complex manual configuration is required. After connection, it can be quickly recognized. Based on the actual site requirements, you can choose the analog voltage or current output mode.
Q: Can it simultaneously provide both voltage and current analog outputs?
A: It supports dual analog output modes of voltage and current. It can be flexibly switched according to the requirements of the on-site equipment, and is compatible with various devices such as frequency converters, valves, temperature controllers, etc. that require analog signals.
Q: What problems can be avoided by cleaning the terminals and inspecting the screws?
A: Terminal cleaning can prevent copper oxidation and poor contact, which leads to signal fluctuations. Inspecting the screws ensures a secure connection, eliminating the need for frequent maintenance in the future. Regular checks of the terminal tightness are sufficient.
Q: Can the Siemens 6ES7288-5AQ01-0AA0 be used in the PID regulation scenario?
A: It can definitely be used in the PID regulation scenario. The signal conversion accuracy is high, and it can output continuous and stable analog signals, which can meet various precise control requirements such as temperature, pressure, and rotational speed, ensuring control accuracy.
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No. 26, Yuhu Street, Encheng Subdistrict, Enping City, Jiangmen City, Guangdong Province, China
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