Serial communications PORT 1 and the Auxiliary Input for demodulated IRIG-B time code
input remain on the relay rear panel.
Communications port baud rate jumpers are located along the front edge of the circuit board.
To select a baud rate for PORT 1 or PORT
S
2, remove the relay front panel. The jumpers
are visible near the center of the relay drawout assembly, to the right of the target LEDs.
Carefully move the jumpers using needle-nosed pliers.
Caution:
Do not select two baud rates for the same port as this can damage the relay
baud rate generator. The relay is shipped with PORT 1 set to 300 baud
and PORT 2F/2R set to 2400 baud.
The baud rates of the ports are set by jumpers located near the front of the main board. They
are accessible by removing the top cover or the front panel. Available rates are 300, 600,
1200, 2400, 4800, and 9600 baud.
The serial data format is:
eight data bits
two stop bits
no parity bit
This format cannot be altered.
(female chassis connector, as viewed from outside panel)
Figure 3.1: Nine-Pin Connector Pin Number Convention
3-2
Communications
SEL-221F, -1 Instruction Manual
Date Code 920508
Summary of Contents for SEL-221F
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Page 110: ...Example Event Report 2 4 12 Event Reporting SEL 221F 1 Instruction Manual Date Code 930830 ...
Page 158: ...SETTINGS SHEET FOR SEL 221F RELAY PAGE 2 OF 6 DATE Date Code 921110 ...
Page 160: ...SETTINGS SHEET PAGE 4 OF 6 FOR SEL 221F RELAY DATE Date Code 930601 ...
Page 161: ...SETTINGS SHEET PAGE 5 OF 6 FOR SEL 221F RELAY DATE Date Code 961208 ...
Page 229: ...SEL 200 Series Relay Main Board Troubleshooting Test Points and Jumper Locations ...