What the EA402 Extension Cable Does
The EA402 is an extension cable used with TQ402 eddy current proximity probes and IQS450 signal conditioners in VM600 machinery protection systems. It carries the probe signal from the sensor to the signal conditioner. This cable is not a generic wire. It is part of a calibrated measurement chain.
Two common part numbers are:
- 913-402-000-012 – EA402, 4.0 m cable, length code E040
- 913-402-000-013 – EA402, 9.0 m cable, length code E090
Main Difference: Cable Length Only
The 012 and 013 cables use the same connector, same shielding design, and same electrical function. The only practical difference is physical length.
| Item | 913-402-000-012 | 913-402-000-013 |
|---|---|---|
| Cable family | EA402 | EA402 |
| Length code | E040 | E090 |
| Cable length | 4.0 m | 9.0 m |
| Connector | Same TQ402 / IQS450 mating | Same TQ402 / IQS450 mating |
| Typical use | Short runs, local conditioner cabinet | Longer runs to remote cabinet or rack |
If the original cable label shows E040, replace it with 913-402-000-012. If it shows E090, replace it with 913-402-000-013.
Why Cable Length Must Match the System
The TQ402 probe, EA402 cable, and IQS450 conditioner are calibrated as a set. Cable length affects the electrical matching of the eddy current probe loop. Changing from 4 m to 9 m can shift gap voltage and zero reference. That can cause false vibration readings or trip logic errors.
Do not use a longer cable just because it reaches the cabinet. After changing cable length, the system must be recalibrated.
When to Choose 4 m or 9 m
4 m cable, E040
- Probe is mounted close to the IQS450 conditioner
- Local junction box is near the machine
- Gearbox, pump, or small motor monitoring with nearby cabinet
- Easier routing in tight spaces
9 m cable, E090
- Steam turbine bearing pedestal to remote cabinet
- Long cable tray from machine to control room
- Compressor or generator monitoring with distance to the rack
- Existing installation already configured for 9 m
The choice is not based on preference. It depends on distance and original system configuration.
Installation and Signal Integrity
- Keep the EA402 cable away from high-voltage power cables.
- Do not pull, kink, or crush the cable.
- Use proper cable glands at junction boxes.
- Do not cut and splice the cable. Splicing changes impedance and damages system calibration.
- If the shield is damaged, replace the cable. Signal noise can cause monitoring faults.
Buying and Replacement Checklist
Before ordering:
- Read the part number from the old cable label.
- Confirm the length code: E040 = 4.0 m, E090 = 9.0 m.
- Check the mating connector on the TQ402 probe and IQS450 conditioner.
- If the label is unreadable, measure the cable length and verify against the system BOM.
- Do not substitute a different EA402 length without system recalibration.
Joyoung International Trading Co., Limited supplies EA402 extension cables 913-402-000-012 and 913-402-000-013 for VM600 vibration monitoring systems. Both lengths are available with fast delivery.
FAQ
Can I use 913-402-000-013 instead of 913-402-000-012?
Only if the measurement chain is recalibrated for the 9 m cable. Otherwise gap voltage and trip thresholds may shift.
What does E040 or E090 mean?
It is the cable length code. E040 = 4.0 m, E090 = 9.0 m.
Are the connectors the same on both cables?
Yes. Both use the same connector for the TQ402 probe and IQS450 conditioner.
Can I extend a 4 m cable with another cable?
No. Adding cable changes the calibrated length and can cause measurement errors. Replace with the correct length.
How do I order the correct EA402 cable?
Contact Joyoung with the machine tag, existing part number, and required length code. Send a label photo if possible.
For EA402 913-402-000-012 or 913-402-000-013 stock and technical confirmation, email [email protected] or call +86-181-5013-7565.
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