Schweitzer engineering Sel-751 User manual

qSELECT Power Supply With I/O (Slot A)

wSELECT Processor and Communications Card (Slot B)

eSELECT I/O Expansion Card (Slot C: see table)

rSELECT I/O Expansion Card (Slot D: see table)

tSELECT I/O Expansion Card (Slot E: see table).

ySELECT 4ACI/3AVIor4ACICard(SlotZ)

uDevice Case

iRear-Panel Mounting Screws

oRear Panel

Refer to the Model Option Table on the SEL website for ordering details Rear-Panel Slot

Card Type A B C D E Z

SELECT PSIO/2 DI/3 DOa

aRefer to the SEL-751 two-line and touchscreen display Model Option Tables (MOT) for power supply and CPU board variants.

●n/a n/a n/a n/a n/a

SELECT CPU/COMan/a ●n/a n/a n/a n/a

SELECT EIA-232/EIA-485 n/a n/a ●n/a n/a n/a

SELECT DeviceNet n/a n/a ●n/a n/a n/a

SELECT 3 DI/4 DO/1 AO (one card per relay) n/a n/a ●●●n/a

SELECT 4 DI/4 DO n/a n/a ●●●n/a

SELECT 4 DI/3 DO (1 Form B, 2 Form C) n/a n/a ●●●n/a

SELECT 8 DI n/a n/a ●●●n/a

SELECT 14 DI n/a n/a ●●●n/a

SELECT 8 DO n/a n/a ●●●n/a

SELECT 8 AI n/a n/a ● ● ● n/a

SELECT 4 AI/4 AO (one card per relay) n/a n/a ● ● ●n/a

SELECT 10 RTD n/a n/a n/a ● n/a n/a

SELECT 2 AVI/4 AFDI (MOT…x70x…) n/a n/a n/a n/a ●n/a

SELECT 2 AVI/4 AFDI (MOT…xL0x…) n/a n/a n/a n/a ●n/a

SELECT 8 AFDI (MOT…x77x…) n/a n/a n/a n/a ●n/a

SELECT 4 ACI/3 AVI (MOT…x81/82/83/85/86/87x…) n/a n/a n/a n/a n/a ●

SELECT 4 ACI/3 AVI (MOT…xL1/L2/L3/L5/L6/L7x…) n/a n/a n/a n/a n/a ●

SELECT 4 ACI (MOT…xA1/A2/A3/A5/A6/A7x…) n/a n/a n/a n/a n/a ●

SEL-751 Card Options

The SEL-751 offers flexibility in tailoring I/O to your specific application. The SEL-751 has six rear-panel slots, labeled

as Slots A, B, C, D, E, and Z. Slots A, B, and Zare base unit slots, each associated with a specific function. Optional

digital/analog I/O cards are available for the SEL-751 in Slots C, D, and E. Optional communications cards are available

only for Slot C; an RTD card is available only for Slot D; the 1 A/5 A/200 mA CT combinations for voltage/current or

current only cards are available only on Slot Z; and a voltage/arc-flash card is available for Slot E. The previous figure

and table show the slot allocations for the cards.

Because installations differ substantially, the SEL-751 offers a variety of card configurations that provide options for the

many diverse applications. Choose the combination of option cards most suited for your application from the selection.

Warnings

Card Installation for Slots C, D, E, and Z

Use the following procedure to install or replace any one of the cards into Slots C, D, E, or Zof the base unit:

1. Save the settings and event report data before installing the new card in the relay.

2. Remove the power supply voltage qfrom terminals A01 (+/H) and A02(–/N), and then remove the ground

wire from the green ground screw (GND).

3. Disconnect all the connection plugs.

4. Remove the eight (8) screws on the rear iand remove the rear cover.

5. Remove the plastic filler plate covering the slot associated with the card being installed.

6. Insert or replace the card in the correct slot.

For proper electromagnetic interference protection, make sure the contact fingers on the printed circuit

board are bent at approximately a 130° angle relative to the board.

7. Before reattaching the rear cover, check for and remove any foreign material that may remain inside the

SEL-751 case.

8. Carefully reattach the rear cover.

9. Reinstall the eight (8) screws that secure the rear cover to the case i.

10. Apply power supply voltage qto terminals A01 (+/H) and A02 (–/N), and reconnect the ground wire to the

green ground screw (GND).

11. If the card is in the proper slot, the front panel displays the following:

STATUS FAIL

X Card Failure

If you do not see this message and the ENABLED light is turned on, the card was inserted in the wrong slot.

Begin again at Step 2.

If you do see this message, then proceed to Step 12.

12. Press the ESC pushbutton.

13. Press the Down Arrow pushbutton until STATUS is highlighted.

DANGER

Disconnect or de-energize all

external connections before

opening this device. Contact

with hazardous voltages and

currents inside this device

can cause electrical shock

resulting in injury or death.

WARNING

Equipment components are sensitive to

electrostatic discharge (ESD).

Undetectable permanent damage can

result if you do not use proper ESD

procedures. Ground yourself, your work

surface, and this equipment before

removing any cover from this equipment.

WARNING

To install an option card the relay must

be de-energized and then reenergized.

When reenergized, the relay will

reboot. Therefore, de-energize the

protected equipment before installing

the option card to prevent damage to

the equipment.

WARNING

Have only qualified

personnel service this

equipment. If you are not

qualified to service this

equipment, you can injure

yourself or others, or cause

equipment damage.