User's Manual

Date Code 20091009 SEL-3031 Instruction Manual
Installation
Communications
2.13
Fiber-Optic Serial Port
Order the fiber-optic option for Port 1 for safety and long-distance communications up
to 4 kilometers (2.5 miles). The fiber-optic port is an SEL-2812-compatible device that
can connect directly to any SEL-2812-compatible device or SEL-2812 fiber optic
transceiver, using multimode fiber-optic cable with a core diameter of 50 to 200
micrometers. When working with this device, observe the following safety
precautions:
!
WARNING
➤ Do not look into the fiber (laser) ports/connectors.
➤ Do not look into the end of an optical cable connected to an optical
output.
➤ Do not perform any procedures or adjustments that this instruction
manual does not describe.
➤ During installation, maintenance, or testing of the optical ports, use
only test equipment qualified for Class 1 laser products.
➤ Incorporated components, such as transceivers and laser emitters, are
not user serviceable. Return units to SEL for repair or replacement.
Port Connector and Communications Cables
Figure 2.5 shows the EIA-232 and EIA-485 DB-9 connector pin numbering for the
SEL-3031.
Figure 2.5 EIA-232 and EIA-485 DB-9 Connector Pin Numbers
Table 2.9 shows the pin function of the serial ports.
Table 2.9 SEL-3031 Port Description (Sheet 1 of 2)
Pin
Port 1, Port 3
EIA-232
Port 2
EIA-232
Port 1
EIA-485
1 +5 Vdc +5 Vdc TX+
2 RXD RXD TX-
3TXD TXD N/C
4 N/C IRIG+ N/C
5 GND GND GND
5 4 3 2 1
9 8 7 6