Schweitzer Engineering Laboratories SEL-700G Series, Instruction Manual, Page: 445 / 824

Date Code 20170814 Instruction Manual SEL-700G Relay
Section 7
Communications
Instruction Manual
Overview
A communications interface and protocol are necessary for communicating
with an SEL-700G Relay. A communications interface is the physical
connection on a device. Once you have established a physical connection, you
must use a communications protocol to interact with the relay.
The first part of this section describes communications interfaces and
protocols available with the relay, including communications interface
connections. The remainder of the section describes the ASCII commands you
can use to communicate with the relay to obtain information, reports, and data
to perform control functions.
Communications Interfaces
The SEL-700G physical interfaces are shown in Table 7.1. Several optional
SEL devices are available to provide alternative physical interfaces. These
include EIA-485, EIA-232, fiber-optic serial port, and copper or fiber Ethernet
port (which can be either single or dual redundant).
Table 7.1 SEL-700G Communications Port Interfaces
Communications Port Interfaces
Location Feature
PORT F EIA-232 Front Standard
PORT 1 Option 1: 10/100BASE-T Ethernet (RJ45 connector)
Option 2: Dual, redundant 10/100 BASE-T Ethernet (Port 1A, Port 1B)
Option 3: 100BASE-FX Ethernet (LC connector)
Option 4: Dual, redundant 100BASE-FX Ethernet (Port 1A, Port 1B)
Rear Ordering Option
PORT 2 a
Multimode Fiber-Optic Serial (ST connector) Rear Standard
PORT 3
a
Option 1: EIA-232
Option 2: EIA-485
Rear Ordering Option
PORT 4 Option 1: EIA-232 or EIA-485 Serial Communications Card
Option 2: DeviceNet Communications Card
b
Rear Ordering Option
a
This port can receive the RTD measurement information OR the field ground insulation resistance measurement from an optional external
SEL-2600 RTD Module or SEL-2664 Field Ground Module. Refer to the applicable SEL-2600 RTD Module or SEL-2664 Field Ground Module
Instruction Manual for information on the fiber-optic interface. The SEL-2600 RTD Module requires the PROTO setting to be set to SEL
protocol at a data rate of 2400 bps, and the SEL-2664 Field Ground Module requires the PROTO setting to be set to SEL protocol at a data
rate of 9600 bps.
b
Refer to Appendix G: DeviceNet Communications for information on the DeviceNet communications card.