Schweitzer Engineering Laboratories SEL-387E - Outputs; Inputs

Date Code 20080110 Testing and Troubleshooting 10-7
SEL-387E Instruction Manual
Outputs
Step 1. Purpose: Verify that output contacts operate when you execute the PULSE
command.
Method: 1. Isolate all circuitry connected to the output contacts.
2. Set the target LEDs to display the output contacts, by typing TAR F
OUT101 <Enter>. The front-panel LEDs should now follow Row 41
of the Relay Word where OUT101 is listed.
3. Execute the PULSE n command for each output contact. Verify that
the corresponding target LED illuminates and the output contact closes
for approximately one second. For example, type PUL OUT101
<Enter> to test output contact OUT101.
4. Repeat this step for each output. Use the TARGET F (TAR F)
command to display the appropriate output elements.
Step 2. Purpose: Verify that externally connected circuitry is operational.
Method: 1. Isolate all circuitry connected to the output contacts except the circuit
under test.
2. Set the target LEDs to display the output contacts by typing TAR F
OUT101 <Enter>. The bottom row of the front-panel LEDs will
follow Row 41 of the Relay Word where OUT101 is listed.
3. Execute the PULSE n command for each output contact. Verify that
the corresponding target LED illuminates and output contact closes for
approximately one second. For example, type PUL OUT101 <Enter>
to test output contact 101.
4. Repeat this step for each output. Use the TARGET F (TAR F)
command to display the appropriate output elements. Verify that the
connected circuitry operates as expected.
Inputs
Step 1. Purpose: Verify that logic inputs assert when control voltage is applied across the
respective terminal pair.
Method: 1. Set the target LEDs to display the level-sensitive inputs by typing
TAR F IN101 <Enter>. The bottom row of the front-panel LEDs will
follow logic inputs IN101 through IN106, which is Relay Word Row
27.
2. Apply the appropriate control voltage to each input and make sure
that the corresponding target LED turns on.
3. Repeat this step for each input. Use the TARGET F (TAR F)
command to display the appropriate output elements.