Schweitzer Engineering Laboratories SEL-3031 - High-Speed Teleprotection or Control with MIRRORED BITS Communications; Figure 3.3 SEL-351 Port Settings for M

Date Code 20181001 SEL-3031 Instruction Manual
Job Done Examples
High-Speed Teleprotection or Control With M
IRRORED BITS Communications
3.3
SEL-351, SEL-311, and SEL-700 Series MIRRORED BITS Settings
The required settings for the SEL-351 are shown below. These settings are similar to
all of the SEL-351, SEL-311, and SEL-700 series of relays. To establish a
communications link via the radio, the most critical settings are PROTO, SPEED,
RTSCTS, RXID, and TXID.
=>SHO P 2 <Enter>
Port 2
PROTO = MB8A
SPEED = 19200 RTSCTS= N RBADPU= 60 CBADPU= 1000
RXID = 1 TXID = 2 RXDFLT=XXXXXXXX
RMB1PU= 1 RMB1DO= 1 RMB2PU- 1 RMB2DO= 1
RMB3PU= 1 RMB3DO= 1 RMB4PU- 1 RMB4DO= 1
RMB5PU= 1 RMB5DO= 1 RMB6PU- 1 RMB6DO= 1
RMB7PU= 1 RMB7DO= 1 RMB8PU- 1 RMB8DO= 1
Figure 3.3 SEL-351 Port Settings for MIRRORED BITS Connection
The SEL-3031 allows you to set Port 1 to 9600, 19200, or 38400 bps (8, N, 1). If the
SEL-3044 Encryption Card is used, the data rate changes to 9600 or 19200 bps
(8, N, 1).
Set PROTO equal to MB8x, where x equals A or B depending on which M
IRRORED
B
ITS channel is used.
NOTE: This setting is slightly different in the SEL-2100 Logic
Processor, SEL-3530 Real-Time Automation Controller
(RTAC), and SEL-321 Relay.
Set SPEED equal to 9600, 19200, or 38400 bps (or 9600/19200 if the encryption card
is installed).
Set RTSCTS (hardware handshaking) to N to disable that option.
Set the RXID equal to one and TXID equal to two at the master end. At the remote end,
set the RXID equal to two and the TXID equal to one. The relays use these addresses to
prevent a relay from receiving messages from a secondary M
IRRORED BITS device if
the paths are accidentally connected wrong. The relay only receives messages sent by a
relay with the matching transmit address and vice versa.
To connect the relay to the radio, use an SEL-C285 cable (DB-9 male-to-DB-9 male
straight-through). If complete electrical isolation is desired between the radio and a
relay EIA-232 communications port, use the SEL-2812MR Fiber-Optic Transceiver
and fiber-optic cable to connect the relay to the radio.
Preliminary Copy—Subject to Change