Holars DT-DBC4F1 4 Branch Controller

Important Information
Description: DBC4F1 video distributor with 4 branches and isolation protection function.
- Can be used as 4 inputs(outdoor stations) controller or 4 outputs(indoor stations) controller;
- Separate isolation protection without affecting another devices on bus system;
- Short-circuit indication for convenient maintenance;
- Periodic self-detection mechanism for recovery
Parts and Functions

IN-USE: Status indicator, it will light up when receives signal.
DIP Switch*DIP 1: Video match switch, the last DBC4F1 at the end of the bus should set ON to match the video impedance.
DIP Switch*DIP 2: Random power, if during power up the power supply goes into short protection due to the surge current, set it to ON to sperate the power on
Bus: Input port, bus connection port.
A,B,C,D: Output port, connect to indoor monitors or door stations.
Note:
- Operation mode: Protection mode will be activated once its connected devices are short circuited, and power supply for ABCD outputs will be turn off, the flashing in-use indicator shows the distributor is in the protection mode.
- Self-detection: System will auto check whether the short circuit is fixed or not, then recover the power supply, and in-user indication will be turn off;
- Detection period: Self-detection will be happened regularly according rules, and in-use indicator will flash rapidly three times when check happens; 1st detection will be happened in 10 seconds after short circuit;
2nd detection will be happened in 60 seconds after 1st detection;
3rd detection will be happened in 5 minutes after 2nd detection;
4th detection will be happened in 10 minutes after 3rd detection;
5th hereafter detection will be happened every 30 minutes;
Unit Mounting
- DIN Rail Mounting

System Wiring with DBC4F1
Mulit Door Station Wiring:

Note: DBC4A1 applies to all door station and monitor, the diagram uses DT591 as an example.
Mulit Monitors Wiring:

Specification
| Power Supply : | DC20~30V |
| Working Temperature: | -100C~+400C; |
| Wiring: | 2 wires (non-polarity); |
| Dimension: | 89(H)×71(W)×45(D)mm |
The design and specifications can be changed without notice to the user. Right to interpret and copyright of this manual are preserved.
Documents / Resources
![]() |
Holars DT-DBC4F1 4 Branch Controller [pdf] User Manual DT-DBC4F1, DT-DBC4F1 4 Branch Controller, DT-DBC4F1, 4 Branch Controller, Branch Controller, Controller |




