8
SEL-2505 Remote I/O Module
Date Code 20010214
Testing the SEL-2505
SEL-2505
TX_ADD = 1 (Switch 1 and 2 = OFF)
RX_ADD = 2 (Switch 3 = ON, Switch 4 = OFF)
PROTO/SPEED = 38400 (Switch 9 = OFF, Switch 10 = OFF)
SEL-351
PROTO = MB8A*
SPEED = 38400
RXID = 1 TXID = 2
* = MB8A or MB8B may be used
SEL-321
PROTO= MB8
SPEED = 38400
TX_ID = 2
RX_ID = 1
SEL-2100
PROTO = MB8
SPEED = 38400
TXID = 1 RXID = 2
Testing the SEL-2505
Testing an SEL-2505 requires another communicating device.
Examples include an SEL-2505, SEL-2100, or a relay with M
IRRORED
B
IT
protocol and the appropriate fiber-optic transducer. The following
test procedure assumes you are using another SEL-2505 as the remote
communicating device. The test procedure for other communicating
devices is similar:
Step 1. Check the SEL-2505 dip-switch configuration settings.
Make certain the transmit address matches the receive
address of the remote device and that the baud rate is
identical.
Step 2. Connect the chassis ground terminal of the SEL-2505 to
ground (Terminal 1).
Step 3. Connect and apply rated voltage to the power supply
inputs of the SEL-2505 (positive to Terminal 4, negative to
Terminal 3). The ENABLE LED should illuminate. The
“b” form of the ALARM contact should remain closed and
the ALARM LED illuminates due to no communications.
Step 4. Press the LAMP TEST pushbutton. All LEDs should
illuminate. When you release the pushbutton, the LEDs
should extinguish.
Step 5. Connect the fiber-optic connections between the
SEL-2505s: transmit (TX) on one device to receive (RX)
on the other. The ROK, TX, and RX LEDs on both devices
should illuminate. In addition, the “b” contacts of the
