East Coast Datacom DBU-232 Manual

The DBU-232 utilizes an RS-232 interface with data rate capabilities up to 128Kbps. The unit
can support up to 3 receive only terminals simultaneously. The DBU-232's master port has a
DB-25 female connector. The sub-channels are also DB-25 female connectors. The DBU-232
continuously broadcasts receive data and receive timing signals from the data source to the 3
output terminal ports. The DBU-232 is housed in a sturdy aluminum enclosure and is supplied
with an internal linear power supply. The unit has a 110/120 VAC rotary select switch located
on the rear of the housing. The unit can operate on standard power found in all countries.
CONTROL LEAD TO CONNECTOR PINOUT
MASTER PORT PINOUT SUBCHANNEL PORT PINOUT
Pin Number Signal Name Pin Number Signal Name
1 Chassis Ground 1 Chassis Ground
3 Receive Data + 3 Receive Data +
7 Signal Ground 7 Signal Ground
17 Receive Timing + 17 Receive Timing +
Pins 4 (RTS) and 20 (DTR) are looped
VOLTAGE SELECTION
It is very important to check that the unit is set to the correct voltage setting for your
application before applying AC power. Located on the rear of the unit you will find a
rotary 110/220 VAC switch. Using a coin or small screwdriver, gently turn the switch to
the appropriate power position as required for your installation (110 or 220 VAC).
VOLTAGE SELECTION FUSES
Located on the back or rear of the product you will find an IEC Power receptacle. This
receptacle contains a fuse drawer. Two (2) fuses are located in this compartment. For
110 VAC +/- 10% operation the unit is equipped with slow blow 5 x 20mm 160ma
Fuses, E.C.D. Part # 714000. For 220 VAC +/- 10% operation the unit is equipped with
slow blow 5 x 20mm 80ma Fuses, E.C.D. Part # 714001.
CONTACTING EAST COAST DATACOM, INC.
Call: [phone], FAX: [phone] or Email: [email protected]
Web Site: www.ecdata.com
Jan 10, 2001
CONFIDENTIAL AND PROPRIETARY TO EAST COAST DATACOM, INC.
CAUTION: Disconnect Power Before Servicing
ATTENTION: Couper Le Courant Avant l' Entretien
VORSICHT: Befor Deckung Abnehmen Mach Strom Zu
DBU-232 TECHNICAL INFORMATION GUIDE PT # 719007-A

Power Connection
Figure 3-1
FRONT PANEL INDICATORS
Located on the front panel of the DBU-232 are three (3) LED indicators. The PWR
indicator and TXD, and TXC which represent the RS-232 control signals. The control
signal indicators light with the presence of DATA and CLOCK from the attached DCE
device (MODEM).
DATA PORT CONNECTION
POWER CONNECTION
Before connecting the DBU-232 to an AC power source the top cover should be
installed with the supplied #4-40 screws. AC power is supplied to the unit through a
2.3m (6.6 ft) cord terminated by a grounded 3-prong plug. Select an appropriate
location accessible to and within four to five feet of an AC outlet. The AC Power source
MUST be grounded or the units Warranty will be void.
Jan 10, 2001
VISIT OUR WEB SITE: WWW.ECDATA.COM
LEASED LINE
MODEM MODEM
DBU-232
TERMINAL
TERMINAL
TERMINAL
RS-232
PWR TXD RXD
DBU-232
EAST COAST
HOST
RS-232
CONNECT TO "MASTER" PORT
CONNECT TO "PORT 1 - PORT 3"