Analysis of Core Functions of OTC Daihen A2 Series Robot Body Cables (CN1/CN2)
In the workstation of OTC DAIHEN‘s classic AII (A2) Series industrial robots (such as models like AII-V6, AII-B4), the main external wiring harness connecting the control cabinet to the robot body base is known as the Body Cable. This set of cables is the “main artery” through which the robot control cabinet delivers surging power and high-speed control commands to the joints of the robotic arm.
To ensure that strong and weak electrical signals do not interfere with each other, OTC officially adopted a dual-cable physical isolation design in the A2 series robots. Each set of cables consists of two core harnesses:
• CN1 Main Power Cable (Thick Wire): Responsible for transmitting the three-phase strong power output by the control cabinet’s servo amplifier, directly driving the high-speed operation of each axis’s servo motor, and carrying the strong power signal for the brake.
• CN2 Encoder Feedback Cable (Thin Wire): Built with multi-layer high-fidelity shielding mesh, it is specifically responsible for transmitting the position pulse signals of the absolute encoders of each joint back to the main CPU board at high speed and without loss. It is the key to ensuring the manipulator’s repeat positioning accuracy of ±0.05mm.
A2RB-1005 (Complete set of cables)
CN1 Thick Cable (L20318C00)
CN2 Thin Cable (L20319C00)
II. Detailed Model Reference Table for OTC A2 Series Robot Body Cable Sets (A2RB Series)
Based on the distance difference in layout between the control cabinet and the robot body in the industrial workshop, the OTC original factory provides cable sets in three standard length specifications: 5 meters, 10 meters, and 15 meters. The following are the official original ordering codes for the specific single CN1 and CN2 cables included in each set:
| Set Ordering Model | Single Cable Name | Physical Length | Official Independent Ordering Model | Standard Quantity Per Set |
|---|---|---|---|---|
| A2RB-1005 (5m Standard Set) |
CN1 (Servo Power Thick Wire) | 5 Meters | L20318C00 | 1 Piece |
| CN2 (Encoder Signal Thin Wire) | 5 Meters | L20319C00 | 1 Piece | |
| A2RB-1010 (10m Mid-Distance Set) |
CN1 (Servo Power Thick Wire) | 10 Meters | L20318D00 | 1 Piece |
| CN2 (Encoder Signal Thin Wire) | 10 Meters | L20319D00 | 1 Piece | |
| A2RB-1015 (15m Extended Set) |
CN1 (Servo Power Thick Wire) | 15 Meters | L20318E00 | 1 Piece |
| CN2 (Encoder Signal Thin Wire) | 15 Meters | L20319E00 | 1 Piece |
* Maintenance Tip: In daily procurement, you can directly purchase the complete set (e.g., A2RB-1005), or you can individually purchase the specific model of CN1 or CN2 depending on the on-site damage situation.
Error-Proofing Standards for Workshop On-Site Routing and Maintenance of Robot Body Cables:
- Strictly prohibit downtime caused by crosstalk from using unshielded substitute wiring harnesses: The CN2 encoder thin wire (such as
L20319D00) is internally wrapped with an extremely precise twisted-pair shielding mesh layer. If inferior imitation wiring harnesses on the market are used, at the moment of arc ignition by peripheral plasma cutting machines or high-power arc welding machines, it is highly prone to position feedback signal packet loss due to poor resistance to high-frequency noise radiation. In light cases, the robot trajectory drifts; in severe cases, it causes the main CPU board (L21505C00) to experience a crash alarm. - Anti-crush and anti-breakage management for floor trench routing: External body cables usually need to be routed in ground cable trenches or corrugated flexible conduits in the workshop. When routing, it must be ensured that the bending radius at the corners is more than 10 times the diameter of the cable. It is strictly prohibited to let heavy-duty forklifts or material carts run directly over the cables without any protection. This will cause the pure copper core inside the CN1 power line to be squeezed and produce a high-impedance hidden break, thereby causing the drive amplifier module to explode and burn out due to phase loss at the moment the motor starts.
️ Quickly Obtain Spot Quotes and Official Technical Support for Body Cables of Various Lengths
If the robot frequently reports an encoder battery error, or instantly triggers a servo abnormal power outage when running to a specific angle, there is a high probability that your body cable (CN1/CN2) has suffered a hidden break during long-term follow-up twisting. You are welcome to provide your specific robot model and required cable length, and contact us directly to obtain the latest official standard factory quotes and today’s spot direct delivery service. We guarantee that every wiring harness possesses the original factory’s excellent high flexibility and anti-crosstalk shielding performance: