EVK-F9DR - User guide
UBX-23007618 - R01 Device description Page 6 of 33
C1-Public
2 Device description
2.1 USB
A USB-C connector is featured for data communication and power supply. USB drivers are installed
automatically through Windows update.
2.2 UART
The unit includes an RS-232 port which can be dynamically connected to the UART of the ZED-F9K,
the NEO-D9S, or the onboard MCU. Selection of the UART connection is controlled by the SEL_NEO_N
and SEL_MCU_N pins on the front connector.
SEL_NEO_N SEL_MCU_N Connected component
LOW OPEN NEO-D9S
OPEN LOW MCU
OPEN OPEN ZED-F9K
LOW LOW None
☞ The selected UART interface is also available via the RxD and TxD pins on the front connector. The
pins are at TTL voltage levels.
⚠ Do not use flow control with the RS-232 port.
2.3 Antenna
There are two female SMA connectors on the unit. The one on the front (RF_IN) is used by the ZED-
F9K module, and the one on the back (RF_AUX) is used by the NEO-D9S module.
The kit includes a u-blox ANN-MB1 L1/L5 active multi-band GNSS antenna with a 5-meter cable to be
used by the ZED-F9K module. A suitable antenna for the NEO-D9S is sold separately.
2.4 26-pin front connector
The connector and its signals are described in the table below. The pins are numbered right to left,
with the odd numbers on the top row and the even numbers on the bottom row.
Pin no. Pin name I/O Level Description
26 VIN 5-24V I 5 - 24 V Main voltage input – can be used in place of the USB connector
25 GND Common ground for casing, power and serial interfaces
24 GND Common ground for casing, power and serial interfaces
23 CAN_H I CAN high signal (ISO 11898-2)
22 VIN_LDOS O LDO input voltage measurement point
21 CAN_L I CAN low signal (ISO 11898-2)
20 CUR_ZED O ZED-F9K current measurement point
19 SEL_NEO_N I Pull-down signal for enabling UART communication with the NEO-D9S
18 CUR_NEO_D9 O NEO-D9S current measurement point
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