Page 1
SCU21T-KVM 79121-KVM User Manual SCU21T-KVM 4K 2x1 HDMI/USB-C Switcher & HDBaseT Receiver All Rights Reserved Version: 79121-KVM_2022V1.0 www.tekvox.com...
Page 2
SCU21T-KVM 79121-KVM User Manual Preface Read this user manual carefully before using the product. Pictures shown in this manual are for reference only. Different product model specifications may vary. This manual is only for operation instruction, please contact the local distributor for maintenance assistance.
Page 3
SCU21T-KVM 79121-KVM User Manual Safety Precautions To ensure the best performance from the product, please read all instructions carefully before using the device. Save this manual for further reference. • Unpack the equipment carefully, and save the original box and packing material for possible future shipment •...
USB devices connected to the DEVICE ports on either the switcher or its receiver, and the USB-C input supports up to 60W charging for connected devices. With its streamlined yet versatile design, the SCU21T-KVM is the perfect switcher for sophisticated, modern video conferencing in any space and any application.
SCU21T-KVM 79121-KVM User Manual 3. Panel Description 3.1 Transmitter 3.1.1 Front Panel AUTO/3s USB-C HDMI AUTO 1 2 3 4 SELECT DISPLAY BLACK SCREEN EDID DEVICES ETHERNET Name Description 1x green indicator light; light is always on when the switcher has power...
SCU21T-KVM 79121-KVM User Manual 3.1.2 Rear Panel GR 1 LOCAL INPUT OUTPUT USB-C HOST HDMI HDMI HDBT AUDIO GR 2 PASS TCP/IP DC 24V Name Description USB-C 1x USB-C 3.0 input; supports 60W charging for connected devices HOST 1x USB 3.0 port for connecting to HOST devices (such as a laptop)
SCU21T-KVM 79121-KVM User Manual 4. EDID Management EDID settings for the switcher are controlled by the EDID DIP switches as described below. In the following table, “0” indicates a switch in the Off or Down position, while “1” indicates a switch in the ON or UP position.
SCU21T-KVM 79121-KVM User Manual 5. GUI Control The SCU21T-KVM can be controlled via TCP/IP protocols. The default IP settings are: IP Address: 132.168.0.178 Subnet Mask: 255.255.255.0 Gateway: 192.168.0.1 Type the IP address of the switcher into a web browser on the control PC to open the web GUI login page.
SCU21T-KVM 79121-KVM User Manual 5.1 Video Tab Select HDMI or USB-C as the active video input source, or toggle Auto-Switching mode 5.2 Configuration Tab 5.2.1 EDID Choose the desired EDID format, or define a custom EDID setting www.tekvox.com...
SCU21T-KVM 79121-KVM User Manual 5.2.2 Auto-Downscaling Enable or disable automatic down-scaling for the transmitter and receiver video outputs 5.2.3 HDCP Choose whether to have the HDCP for the transmitter and receiver follow the source or display www.tekvox.com...
SCU21T-KVM 79121-KVM User Manual 5.2.4 Tags Customize the tags for the HDMI and USB-C inputs, and for the transmitter and receiver HDMI outputs www.tekvox.com...
SCU21T-KVM 79121-KVM User Manual 5.3 CEC Tab 5.3.1 Input Click to send the corresponding CEC command to the device connected to the HDMI input 5.3.2 Output Click to send the corresponding CEC command to the device connected to either the transmitter or receiver’s HDMI output...
SCU21T-KVM 79121-KVM User Manual 5.3.3 User-Defined Define custom CEC commands to send to either the transmitter or receiver’s HDMI inputs or outputs. Click “Send” next to a custom command to send to the corresponding input or output 5.4 RS232 Tab Choose whether to format RS232 commands as ASCII or HEX characters www.tekvox.com...
SCU21T-KVM 79121-KVM User Manual Baud Rate: 9600, 19200, 38400, 57600, 115200 Command Ending: NULL, CR, LF, or CR+LF Command: Type an RS232 command to send to the third-party device connected to the RS232 port 5.5 Network Tab Choose whether the switcher is set to a Static IP address or gets a DHCP automatically from the...
SCU21T-KVM 79121-KVM User Manual 5.6 Access Tab Password: Modify the password for accessing the web GUI Firmware Upgrade: Browse to the file location of the firmware upgrade file in the computer’s file explorer. Press “Confirm” while the switcher is in Upgrade Mode to update its firmware.
79121-KVM User Manual 6. RS232 Control Before controlling the SCU21T-KVM, make sure that all relevant inputs and outputs are connected, and that the COM port, baud rate, data bit, stop bit, and parity bit are set correctly. Baud Rate: 9600...
Page 22
SCU21T-KVM 79121-KVM User Manual Command Description Command & Feedback Example SCU21T-KVM V1.0.0 PWON! HDBT 01 Power ON! HDMI Out 01 Down Scale OFF! HDMI Out 02 Down Scale OFF! HDMI Out Switch Auto Mode! Get Trigger Mode is 5V. System Unlock! Baudrate 9600! GUI_IP:192.168.0.200!
SCU21T-KVM 79121-KVM User Manual Command Description Command & Feedback Example 6: 57600 7: 115200 [xxx] = RS232 command Set an RS232 display off command to be sent when no input is detected y = Baud Rate, 1 ~ 7 1: 2400...
Page 24
SCU21T-KVM 79121-KVM User Manual Command Description Command & Feedback Example CEC_TC_VOLMUTE/UNMUTE! Mute display audio via CEC TVMUTE. CEC Output 01 Send Success. command CEC Output 02 Send Success. Set the output HDCP to follow the input OUT 01 HDCP PASSIVE! HDCP[x]PAS.
Page 25
SCU21T-KVM 79121-KVM User Manual Command Description Command & Feedback Example 7: 115200 y = TX or RX, 0 ~ 1 zzz = RS232 command Turn off the HDMI output’s 5V, making it undetectable as @OUT[xx]. an active source Set Output Black Screen ON!
Page 26
SCU21T-KVM 79121-KVM User Manual Command Description Command & Feedback Example Set input port xx to use EDID setting yy xx = 00 ~ 02 00: All input ports Input 02 EDID Upgrade OK By 01 EDID/[xx]/[yy]. Internal EDID! yy = 01 ~ 12...
Page 27
SCU21T-KVM 79121-KVM User Manual 7. System Connection www.tekvox.com...
Page 28
SCU21T-KVM 79121-KVM User Manual www.tekvox.com...
Page 29
SCU21T-KVM 79121-KVM User Manual www.tekvox.com...
Page 30
SCU21T-KVM 79121-KVM User Manual 8. Panel Drawing www.tekvox.com...
Need help?
Do you have a question about the SCU21T-KVM and is the answer not in the manual?
Questions and answers