![background image](http://html.mh-extra.com/html/schweitzer-engineering/sel-751/sel-751_manual_1216681001.webp)
q
SEL
ECT
Power Supply With I/O (Slot A)
w
SEL
ECT
Processor and Communications Card (Slot B)
e
SEL
ECT
I/O Expansion Card (Slot C: see table)
r
SEL
ECT
I/O Expansion Card (Slot D: see table)
t
SEL
ECT
I/O Expansion Card (Slot E: see table).
y
SEL
ECT
4 ACI/3 AVI or 4 ACI Card (Slot Z)
u
Device Case
i
Rear-Panel Mounting Screws
o
Rear 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
SEL
ECT
PSIO/2 DI/3 DO
a
a
Refer 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
SEL
ECT
CPU/COM
n/a
●
n/a
n/a
n/a
n/a
SEL
ECT
EIA-232/EIA-485
n/a
n/a
●
n/a
n/a
n/a
SEL
ECT
DeviceNet
n/a
n/a
●
n/a
n/a
n/a
SEL
ECT
3 DI/4 DO/1 AO (one card per relay)
n/a
n/a
●
●
●
n/a
SEL
ECT
4 DI/4 DO
n/a
n/a
●
●
●
n/a
SEL
ECT
4 DI/3 DO (1 Form B, 2 Form C)
n/a
n/a
●
●
●
n/a
SEL
ECT
8 DI
n/a
n/a
●
●
●
n/a
SEL
ECT
14 DI
n/a
n/a
●
●
●
n/a
SEL
ECT
8 DO
n/a
n/a
●
●
●
n/a
SEL
ECT
8 AI
n/a
n/a
● ● ●
n/a
SEL
ECT
4 AI/4 AO (one card per relay)
n/a
n/a
●
●
●
n/a
SEL
ECT
10 RTD
n/a
n/a
n/a
●
n/a
n/a
SEL
ECT
2 AVI/4 AFDI (MOT…x70x…)
n/a
n/a
n/a
n/a
●
n/a
SEL
ECT
2 AVI/4 AFDI (MOT…xL0x…)
n/a
n/a
n/a
n/a
●
n/a
SEL
ECT
8 AFDI (MOT…x77x…)
n/a
n/a
n/a
n/a
●
n/a
SEL
ECT
4 ACI/3 AVI (MOT…x81/82/83/85/86/87x…)
n/a
n/a
n/a
n/a
n/a
●
SEL
ECT
4 ACI/3 AVI (MOT…xL1/L2/L3/L5/L6/L7x…)
n/a
n/a
n/a
n/a
n/a
●
SEL
ECT
4 ACI (MOT…xA1/A2/A3/A5/A6/A7x…)
n/a
n/a
n/a
n/a
n/a
●
6
7
8
9
1
2
3
4
5
SEL-751 Card Options