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ABB Distribution Protection Unit 1500R
Communications Ports
The DPU1500R has a standard 9-pin RS-232C interface on the front for serial port communications. Connect a 9-pin
RS-232C cable and 9-pin null modem adaptor from this port to your personal computer to have direct point-to-point
communications using WinECP software provided with the relay. Refer to the Windows External Communications in
Section 5 of this manual for the proper communications parameters.
As an option, one or two serial port terminations can be provided at the rear of the DPU1500R. This rear port, can be
a 9-pin RS-232C, 3-wire RS-485, 2-wire INCOM, IRIG-B or SCADA Interface Unit (SIU) connection. The full
communication hardware configuration is on every DPU1500R and DPU2000R, but not all ports are operational.
Please consult the Select Communication Options Table on 12-10 to determine which ports are available for a given
catalog number. The front or rear RS-232C ports can interface with a modem using a straight through cable and a
remotely connected computer. The RS-232C ports can also interface directly to a PC with the use of a null modem
cable. The RS-232C ports are configured as data terminal equipment.
The DPU1500R supports various byte-oriented protocols. The command message structure and substructures for
these protocols are available upon request. Contact the nearest ABB sales office or ABB at its Allentown, PA factory
and request the "Protocol Document" for the unit type (DPU1500R and the specific protocol of interest). The following
protocols are available in the DPU1500R relay:
•
STANDARD—ABB 2000 series-specific ASCII oriented 10 byte communication protocol available through all
ports
®
•
INCOM
—a two-wire communications system and protocol
•
DNP 3.0 (IEC870-5)—a protocol available through the Auxiliary Communications port
®
•
Modbus
—a protocol available through the Auxiliary Communications port
Pin Connections
The pin connections for the various communications ports are shown in Tables 12-2 and 12-3.
Table 12-2. RS-232 Pin Connections
Pin Number
2
3
5
website:www.abb.com/papd
12-4
Signal
Receive data–Relay receives data through this pin.
Transmit data–Relay transmit data through this pin.
Signal ground–Front port has signal ground tied to
the chassis; rear port signal ground is fully isolated.
Ordering Information/Communications/Panel Mounting/Spare Parts
9/99
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