2.9
Date Code 20100129 Instruction Manual SEL-751A Relay
Installation
I/O Configuration
I/O Card (4 DI/4 DO)
Supported in any nonbase unit slot (Slot C through Slot E), this card has four
digital inputs and four outputs. The four outputs are either all normally open
contact outputs or all fast hybrid (high-speed, high-current interrupting)
outputs. Table 2.11 shows the terminal allocation.
I/O Card (8 DI)
Supported in any nonbase unit slot (Slot C through Slot E), this card has eight
digital inputs. Table 2.12 shows the terminal allocation.
I/O Card
Configuration
Procedure
Changing card positions, or expanding on the initial number of cards requires
no card programming; the relay detects the new hardware and updates the
software accordingly (you still have to program the I/O settings using the SET
command).
Swapping Optional I/O Boards
When an I/O board is moved from one slot to a different slot, the associated
settings for the slot the card is moved from will be lost. For example, if a
4 DI/4 DO card is installed in Slot 4 (Slot D), the SEL
OGIC settings
OUT401-404 would be available. If OUT401 = IN101 AND 51P1T, and the
card is moved to a different slot, then the OUT4xx settings will be lost. This is
true for all the digital and analog I/O cards.
Table 2.11 Four Digital Input/Four Digital Output (4 DI/4 DO) Card Terminal
Allocation
Te r m in a l N u m b e r Software Reference, Description
a
a
x = 3, 4, or 5 (e.g., OUT401, OUT402, etc., if the card was installed in Slot D).
01, 02 OUTx01, driven by OUTx01 SELOGIC equation
03, 04 OUTx02, driven by OUTx02 SEL
OGIC equation
05, 06 OUTx03, driven by OUTx03 SEL
OGIC equation
07, 08 OUTx04, driven by OUTx04 SEL
OGIC equation
09, 10 INx01, drives INx01 element
11, 12 INx02, drives INx02 element
13, 14 INx03, drives INx03 element
15, 16 INx04, drives INx04 element
Table 2.12 Eight Digital Input (8 DI) Card Terminal Allocation
Te r m in a l N u m b e r Software Reference, Description
a
a
x = 3, 4, or 5 (e.g. IN401, IN402, etc. if the card was installed in Slot D).
01, 02 INx01, drives INx01 element
03, 04 INx02, drives INx02 element
05, 06 INx03, drives INx03 element
07, 08 INx04, drives INx04 element
09, 10 INx05, drives INx05 element
11, 12 INx06, drives INx06 element
13, 14 INx07, drives INx07 element
15, 16 INx08, drives INx08 element