How to Read CO2 Laser Power Supply Terminal Labels
Terminal labels are an important part of CO2 laser power supply identification. When replacing a damaged unit, matching only the wattage and input voltage is not enough. The technician must also compare the terminal names, control method, protection connection and high-voltage output arrangement.
The following explanation is based on the MYJG50W power supply shown in the reference image. Terminal definitions may differ between models or product versions, so always check the label and technical information supplied with the actual unit.
AC Input Terminals
The AC input section shown in the image is marked:
- FG: protective frame ground
- AC / AC: AC power input connections
The power supply is available in different input-voltage configurations. Before replacement, check the product label and confirm that the selected version matches the machine’s actual electrical input.
Do not determine the voltage only from the plug type or destination country. Some laser machines use an internal transformer or have been electrically modified.
Laser Control Terminals
The low-voltage control section is marked H, L, P, G, IN and 5V.
According to the MYJG50W reference diagram:
- H: laser emission control using an active-high signal
- L: laser emission control using an active-low signal
- P: water-protection or interlock input
- G: control-signal ground
- IN: laser power control signal input
- 5V: auxiliary 5V output shown in the product diagram
A photograph taken before removing any wire is particularly useful. It preserves the original terminal positions and helps the supplier or technician compare the old unit with the proposed replacement.
Jinan Zhenyu Electronics Co., Ltd. (ZYE Laser)can review these details and assist with an initial compatibility check. Final wiring and installation should be confirmed by a qualified technician.
FAQ
Can two power supplies with the same wattage have different terminals?
Yes. Terminal order, labels and control logic may differ between models or versions.
Can wire colors be used to identify terminal functions?
No. Check the printed terminal labels and machine documentation. Wire colors may vary or may have been changed during previous repairs.
CTA
Need help identifying a replacement CO2 laser power supply? Send us clear photos of the original label, terminals, wiring and laser tube information for an initial comparison.