Description

The DBU-2328_M is designed for RS-232 asynchronous data protocols, featuring two input ports (Port-A and Port-B) and eight output ports (1-8). It operates using RTS/CTS handshaking, allowing one input port to connect at a time while the other remains in standby.
It should be noted that the RTS signal given to the products internal Microcontroller is a combination of RTS (pin 4) and DTR (pin 20) of the input Async port. If DTR is not required, there is a 3-Pin header on the PCB to enable or disable the DTR requirement. CTS is returned to the selected input port with a delay based on the 4 position dip switch settings 1 & 2. The delay range is based on milliseconds(ms), the options are: 5, 10, 25 and 50ms (50ms is factory default, best for async character recognition).

After input Port A or B is connected via RTS/CTS handshake Data is then transmitted out to the 8 broadcast ports. The broadcast ports are configured as DCE devices. Therefore, the data is transmitted out on pin 3 (Received data).

RTS from the selected input port is passed to the broadcast ports as CTS (pin 5)
CTS to the broadcast ports may be forced using S1 dip switch position 3 located on the PCB.

Carrier Detect (CD pin 8) and Data Set Ready (DSR pin 6) will be forced on each of the eight broadcast ports.

Input Port-A or Port-B will remain connected to the box for as long as RTS is high to the input port.
EXAMPLE: When Port-A drops RTS, Port-B can then have access if RTS is raised high.

There are two front panel switches to enable or disable the input async ports A or B.

Housed in a sturdy metal enclosure and equipped with an internal 110/220VAC switch selectable linear power supply, the unit will provide more than 400,000 hours of reliable service.

SPECIFICATIONS Application 8-Port Data Broadcast with Dual Input Data Ports that allow a single port connection using RTS/CTS handshaking Capacity Two Input Ports Eight Output Ports All ports are DCE Interfaces  Handshake Method for Input Ports A/B  RTS to CTS or RTS/DTR to CTS Data Format Asynchronous - data transparent at all data rates Any character length Data Rates Up to 19.2Kbps Interface EIA RS-232 with Surge Protection RS-232 Port Connections DB-25 female connectors RTS to CTS Delay Options 5, 10, 25 & 50ms (Dip Switch Selectable) Cascade Box to Box Support Yes – J6 Jumper on PCB to 1-2 position Front Panel Indicators Power(PWR), Active Input as Port-A & RTS and Port-B & RTS, output ports 1-8 as RXD & CTS when Port-A /B are connected with RTS/CTS handshake, Input Ports A/B switch enable LED’s, Test Patt LED. Power Source 100-120Vac, 0.16A or 200-240Vac, 0.08A, 50-60Hz, external 110/220 volt select switch, IEC Power Inlet, (2) 5mm Fuses Power Draw Less than 3 watts total MTBF 557,600 Hours Benign Ground, Controlled, Telcordia Issue 1 Approvals – EMI / Safety / Environmental EMI Approvals FCC 47CFR, Part 15, Subpart B for conducted emissions from a Class A FCC 47CFR, Part 15, Subpart B for radiated emissions from a Class A Safety Approvals UL 62368-1 Dimensions Height ....... 1.75 inches (4.44 cm) Width ........ 17.00 inches (43.18 cm) Depth ....... 9.00 inches (22.86 cm) Environmental Operating Temperature: 50º to 160º F (10º to 60º C) Operational Alt.: 0 to 2000 Meters above sea level Operational Relative Humidity: 10% to 80% Non-Operational Temperature: -30 degC to 70 degC Non-Operational Alt.: 0 to 50,000 feet above sea level EMI Approvals FCC 47CFR, Part 15, Subpart B for conducted emissions from a Class A FCC 47CFR, Part 15, Subpart B for radiated emissions from a Class A Weight 5.0 pounds (2.267 Kg) in the box Warranty Three Years, Return To Factory Ordering Information Part Number: 295000 Model: DBU-2328_M Description: 2-Port Data Sharer with 8-Port RS-232 Data Broadcast Ports, 1U Rackmount Chassis Included with each unit: 1) Operations Manual 2) U.S.A. Grounded Power Cord, Part # 713015 3) 1U Rackmount ears, PT# 702037 4) 0.080ma Fuse, Qty (2) Part # 714001 OTHER EAST COAST DATACOM PRODUCTS RS-232 Data Sharer with 2-8 Ports Network Latency Emulators Interface Converters Sync data to IP Converter RS-232 data broadcast - repeater EAST COAST DATACOM DESIGNS AND MANUFACTURES DATA COMMUNICATION EQUIPMENT FOR YOUR NETWORK REQUIREMENTS.