The Bosch Rexroth KE350 / KE350G IL communication unit is a crucial component designed for integration into BT356 card racks or SB35x system boxes, serving as the central coordinator for tightening controllers within a tightening system. It also manages interfaces to partner systems, ensuring seamless communication and operation. The KE350G IL model offers enhanced functionality, including a monitor output and integrated logic compliant with IEC 61131-3.
Function Description:
The communication unit's primary role is to coordinate the various tightening controllers within a system and to facilitate communication with external partner systems. It acts as a central hub, processing control signals and managing data exchange. The KE350/KE350G IL communicates with tightening control units (e.g., SE352/SE352M) via an internal bus system. Control signals are assigned to inputs/outputs through a PLC assignment table, configured using the BS350 operating program.
Key Interfaces and Features:
The front panel of the KE350/KE350G IL features several interfaces and indicators:
- Slots (B1, B2): Two slots are available for inserting standard type B interface modules from Rexroth.
- Slot (A): One slot is provided for standard type A interface modules from Rexroth.
- LEDs and Reset Button:
- The KE350G IL has four LEDs (Run/Stop, Error, and two for network status) and a reset button.
- The KE350 has two LEDs (Run/Stop, Error) and a reset button.
- LED indications:
- Red flashing: System error
- Green: Ready for operation
- Green flashing: Not ready for operation (e.g., sequence test or initialization in progress)
- Red/green flashing: Data traffic active
- Green (KE350G IL only): Integrated logic activated
- Red (KE350G IL only): Integrated logic deactivated
- Red flashing (KE350G IL only): Integrated logic error
- The reset button allows for a software reset (brief press, < 1 second) or a hardware reset (long press, > 3 seconds), which resets the controller and power section.
- RS232 Interface (X3C1): A 9-pin SUB-D socket for connecting printers or scanners, supporting a maximum data transmission rate of 115 kbit/s.
- Pin assignments include RxD, TxD, GND, RTS, and CTS, with voltage levels of -12 V to +12 V, RS232 standard.
- USB Host Interfaces (X3U1, X3U2): Two type A USB sockets, compliant with USB 2.0 specification. The total current for all USB host interfaces (X3U1, X3U2, X3U4) must not exceed 1 A.
- USB Device Interface (X3U3): A type B USB socket, compatible with USB 2.0 (maximum data rate 3 Mbit/s), intended for connecting a PC for programming and parameterization.
- Pin assignments include VCC (5V supply from PC, 0.5A), USB_S_Data– (send), USB_S_Data+ (receive), and GND (PE potential).
- Ethernet Interface (X7E1): An 8-pin RJ45 socket (10/100 TBase T) for network connection.
- LED indicators: Yellow (100 Mbit/s transfer speed), Off (10 Mbit/s transfer speed), Green (connection active), Green flashing (data transfer running), Off (no network connection).
- Pin assignments include Transmit+, Transmit–, Receive+, Receive–, and NC (not connected). The MAC address is found on the name plate.
- USB Host Interface (X3U4) (KE350G IL only): A type A USB socket, compliant with USB 2.0, serving as a USB return channel for a touchscreen/mouse. The connected device must behave like a USB mouse.
- DVI Interface (XDVI) (KE350G IL only): A DVI-D single link digital socket for connecting an external monitor, supporting resolutions of VGA (640 x 480), SVGA (800 x 600), and XGA (1024 x 768). VGA monitors cannot be connected via an interface adapter.
- Pin assignments include TMDS Data (2–, 2+, 1–, 1+, 0–, 0+), TMDS Data Shield, VCC (5V supply, 0.5A), GND (PE potential), HPD (Hot Plug detect), TMDS Clock (Shield, CLK+, CLK–), and n.c. (not connected).
- Mass Storage Slot (X6C1): For the CF350 mass storage device. When inserting the CF350, ensure the plug-in contacts face the front and the "Rexroth" product label is visible.
- Battery (10): A battery-buffered SRAM is integrated for storing tightening results and powering the system clock. Data (including date and time) will be lost if the battery is discharged, leading to an error message.
Important Technical Specifications:
- Order Numbers: KE350 (0 608 830 264), KE350G IL (0 608 830 265).
- Admissible Ambient Temperature during Operation: 60 °C.
- Admissible Relative Humidity during Operation: 20% - 90% non-condensing.
- Admissible Storage Temperature: –20 °C to 70 °C.
- Admissible Relative Storage Humidity: 20% - 95%.
- Protection Class: IP20 (~ NEMA 1).
- Dimensions (W x H x D): 45.8 mm x 271 mm x 285 mm.
- Weight (without modules): 1.5 kg.
Usage Features:
The KE350/KE350G IL is designed for industrial use as a technical work appliance, not for private use. It must be installed by qualified personnel who possess basic mechanical and electrical knowledge and are familiar with relevant technical terms and safety regulations. ESD protection measures are required during assembly. The unit should only be commissioned after being fully integrated into the intended machine/system and after all electrical connections are properly secured or covered. It is crucial to allow the product to acclimate for several hours before commissioning to prevent condensation.
Maintenance Features:
The KE350/KE350G IL communication unit is generally maintenance-free when used as intended. However, specific maintenance tasks include:
- Cleaning: Use a slightly damp, lint-free cloth with water and a mild detergent. Avoid solvents or aggressive cleaning agents. All openings must be covered during cleaning to prevent ingress of cleaning agents.
- Battery Replacement: The integrated battery (e.g., SONY CR2450 or VARTA CR2450 Lithium battery 3 V, Q ≥ 560 mAh, 24.5 x 5 mm) should be replaced when discharged to prevent data loss. Before replacement, data backup is recommended. The positive terminal of the new battery must face upwards, and it should be inserted using fingers, not conductive tools, to prevent short-circuits. After replacement, the real-time clock must be reset using the BS350 operating program.
- Troubleshooting: Malfunctions and error messages are displayed via the BS350 tightening system. If issues cannot be resolved, contact Bosch Rexroth service.
- No Conversion: The communication unit must not be converted or modified.
The product is subject to natural wear and aging, and the warranty applies only to the delivered configuration, becoming void if the product is incorrectly assembled, handled, or used improperly. Mechanical loads must be avoided, and the unit should never be used as a handle or step.
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