How to Install the NXB-CBL-NET5533-013 M12 Fieldbus Connector

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Tools Required

• Wire stripper
• Precision flathead screwdriver (2.5mm)
• Cable cutter
• Torque screwdriver (0.2 - 1.0 Nm range)

Article

The NexBot Robotics NET533-013 is a field-wireable M12 fieldbus connector designed for robust and reliable network connections in industrial environments. Proper installation is critical to ensure data integrity and prevent intermittent communication failures on your DeviceNet network, which can lead to unscheduled downtime for robotic systems. This guide details the procedure for terminating a DeviceNet cable with the NET533-013 connector.

Prerequisites

Before beginning the installation, ensure you have the following tools, materials, and safety precautions in place.

Safety Warning: Always disconnect, lock out, and tag out (LOTO) all power sources to the robot controller and any related equipment before performing wiring procedures. Failure to do so can result in electric shock or equipment damage.

• Materials:
• One NXB-CBL-NET533-013 M12 Fieldbus Connector kit.
• Appropriate DeviceNet trunk or drop cable (ensure cable diameter is compatible with the connector's strain relief).
• Required Tools:
• Precision wire stripper
• Cable cutter or utility knife
• Precision flathead screwdriver (2.5mm recommended)
• Torque screwdriver (with a range of 0.2 - 1.0 Nm)
• Knowledge:
• A basic understanding of industrial wiring practices.
• Familiarity with the DeviceNet color code standard.

Step-by-Step Instructions

Follow these steps carefully to ensure a secure and reliable connection.

Step 1: Prepare the Cable

1. Slide the connector's outer pressure screw and housing onto the cable. Do not forget this step, as you cannot add them after wiring the contact insert.
2. Carefully strip approximately 30 mm (1.2 inches) of the outer cable jacket, being careful not to nick the shielding or inner conductors.
3. Trim the foil shield, leaving the drain wire intact.
4. Strip approximately 5 mm (0.2 inches) of insulation from the end of each of the four colored conductors (Red, Black, White, Blue) and the drain wire.

Step 2: Wire the Contact Insert

1. Loosen the small terminal screws on the contact insert.
2. Insert each wire into its corresponding terminal according to the standard DeviceNet 5-pin M12 pinout. Ensure no stray wire strands are present.
3. Use the table below for the correct pin assignment:

| Pin | Signal | Standard Wire Color | |---|---|---| | 1 | DRAIN | Bare (Shield) | | 2 | V+ | Red | | 3 | V- | Black | | 4 | CAN_H | White | | 5 | CAN_L | Blue |

1. Using a torque screwdriver, tighten each terminal screw to 0.2 Nm. This ensures a secure electrical connection without damaging the screw or conductor.

Step 3: Assemble the Connector

1. Gently push the wired contact insert into the connector's metal shell until it clicks into place. Ensure it is properly oriented.
2. Slide the main housing up the cable and screw it onto the metal shell. Hand-tighten securely.
3. Slide the pressure screw (cable gland) up and tighten it to secure the cable and provide strain relief. Tighten to 0.8 Nm to ensure the IP67 seal is engaged. Do not overtighten.

Verification

After assembly, perform the following checks to verify proper installation.

• Mechanical Check: Gently pull on the cable to ensure it is firmly held by the pressure screw and does not pull out of the connector housing. Confirm all parts of the housing are screwed together tightly.
• Electrical Check (Recommended): Use a multimeter in continuity mode to verify a connection between the end of each wire and its corresponding pin. Check for short circuits by testing for continuity between adjacent pins. There should be no continuity between different pins.
• Network Check: Connect the cable to the intended device on the robotic system (e.g., an I/O block on a NexBot R-20 arm). Power on the system and observe the network status LEDs on the controller and peripheral devices. A solid green light typically indicates a stable network connection.

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