User's Manual

4
SEL-FT50/SEL-FR12 Fault Transmitter and Receiver System Instruction Manual Date Code 20170317
System Overview
Figure 3 SEL-FR12 Overview
The SEL-FR12 collects wireless signals simultaneously from as many as 12
SEL-FT50 Fault Transmitters (enough for 4 three-phase installations). The
SEL-FR12 reports faults to a relay or recloser control in less than 6 ms via
M
IRRORED BITS. The SEL-FR12 HMI contains 29 LEDs and 1 pushbutton, as
shown in Figure 3.
➤ The ENABLED LED illuminates green when the SEL-FR12 is
turned on and operational.
➤ The 12 FAULT LEDs (red, one per Unit ID) illuminate after the
SEL-FR12 receives a Fault message from the associated
SEL-FT50. These LEDs have a latching behavior so that once
set, they remain on until reset by the TARGET RESET pushbutton
or via M
IRRORED BITS command.
➤ The 12 LINK LEDs (green, one per Unit ID) have a tristate
operation:
➢ LINK LEDs are initially off when the SEL-FR12 is
turned on or after it receives a clear link status
command via M
IRRORED BITS.
➢ LINK LEDs illuminate when the SEL-FR12 receives
consecutive Link messages or one Fault message from
the associated SEL-FT50. These LEDs have a delayed
dropout behavior. Once illuminated, they remain
illuminated as long as Link signals are periodically
received.
➢ LINK LEDs begin to flash after one minute elapses
without receipt of a Link message for the associated
Unit ID. When Link or Fault signals resume, the LINK
LED stops flashing and stays illuminated once again.
ENABLED
LED
FAULT and LINK
status LEDs
MIRRORED BITS
status LEDs
TARGET RESET
pushbutton
Serial port
(DB-9 connector)
Power supply
input (9–30 Vdc)
Control (DIP) switches to select:
• Network ID—SW 1–4
• Baud rate—SW 5–6
• MIRRORED BITS TX and RX ID—SW 7–10
• Near/distant SEL-FT50—SW 11–14
Radio antenna
BNC connector
Grounding lug