109-0852-4A01-07 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat 109-0852-4A01-07 is part of the VT-UK2 Universal Cards series. It uses a SERCOS interface and operates with a nominal supply of 24 V while supporting up to a 4 MBaud data rate. The card features 6 digital inputs, FSMA connectors for fiber optic transmission, and a maximum current consumption of 100 mA.
Internal Product Review
The 109-0852-4A01-07 is a VT-UK2 universal card built for SERCOS communication over fiber-optic media. Electrical integration is straightforward with a 24 V nominal supply and only 100 mA maximum current consumption. A maximum data rate of 4 MBaud makes the card a strong choice for responsive control networks.
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Product Description:
The 109-0852-4A01-07 is a communication module produced by Bosch Rexroth Indramat for the VT-UK2 Universal Cards series. Designed for SERCOS motion-control networks, the board converts optical signals to logic levels so drive controllers can exchange deterministic data in automated machinery. It mounts in a controller rack and provides the required I/O and fiber links without using additional field wiring space. Because the optical interface is on the card itself, the module can bridge backplane logic and the network connection without external converter hardware.
During operation, the card draws a maximum current of 100 mA from the system supply rail, keeping dissipation low inside the rack. The nominal supply and the high-level switching threshold are both 24 V, while low-level signals may not exceed 5.5 V, giving clear noise margins for the six optically isolated input channels. Each channel uses filtering at the terminals, with 1 nF components on E1, E2, E3, and E6 and a 22 pF network on E4 and E5 to suppress fast transients before they reach the logic stage. Default bus traffic is exchanged at 2 MBaud, and the optical transmitter launches at -4.5 dBm. Interface compliance with the SERCOS profile is maintained through a duplex link that uses FSMA connectors for both transmit and receive fibers.
For higher throughput, the board can be switched to 4 MBaud, and the transmitter power can be raised to 0 dBm to offset longer cable runs or higher link losses. Communication travels over a single-mode or multimode strand classified as Fiber Optic (LWL), and the integrated source maintains a spectral bandwidth of 30 nm so wavelength drift stays within SERCOS tolerances. Matching receptacles on the receive and transmit sides simplify the use of pre-terminated patch cords, while the established input thresholds and onboard filters help preserve signal integrity when electrical noise is present on adjacent control lines.
