INSTALLATION
WIRING REQUIREMENTS
2
-
11
NOTE:
For a single point grounding system, system common of all
I/O devices that interface with the Type SLC controllers must be the
same potential as the Type SLC controller system common.
The isolated system common bus should be grounded by use of a
dedicated grounding electrode, i.e., a grounding electrode separate
from the alternating current (safety ground) grounding electrode.
There should be no greater than one-ohm resistance between the
dedicated grounding electrode for the DC single point grounding sys-
tem and the alternating current (safety ground) grounding electrode.
NOTE:
Where it is not possible to provide a dedicated grounding
electrode for system common, then connection to the site’s ground-
ing electrode must be by a grounding conductor used for no other
purpose (no other equipment may be grounded through the same
grounding conductor).
Figure 2-4. Recommended Single Point Grounding System
N O T E 3
N O T E 5
N O T E 5
N O T E 5
T 02 13 6 A
N O T E 5
N O T E 4
N O T E 2
S Y S T E M C O M M O N
A C S A F E T Y C O M M O N
D E D IC AT E D
G R O U N D
F O R
S A F E T Y
C O M M O N
N O T E S :
1 . C U T A N D R E M OV E J U M P E R W 1 0 6 O N P OW E R S U P P LY B O A R D O F A L L C O N T R O L L E R S TO B E L IN K E D
TO G E T H E R V IA M O D U L E B U S .
2 . C O N N E C T E AC H C O N T R O L L E R TO S Y S T E M C O M M O N B U S U S IN G N O. 1 4 AW G W IR E.
3 . C O N N E C T S YS T E M C O M M O N B U S TO E A RT H G R O U N D AT O N LY O N E P O IN T U S IN G N O . 8 A W G W IR E .
4 . M O D U L E B U S W IR E S S H O U LD B E T W IS T E D S H IE L D E D PA IR , S T R A N D E D W IR E S IN S U L AT E D W IT H L OW L E A K A G E
IN S U L AT IO N M AT E R IA L S . S H IE L D S S H O U L D B E G R O U N D E D AT O N E E N D O N LY U S IN G O N E O F T H E T W O S C R E W S
L O C AT E D IN U P P E R C O R N E R S O F T E R M IN AT IO N U N IT. M IN IM U M W IR E S IZ E F O R T H E S E C O N N E C T IO N S IS
N O . 1 8 AW G W IR E .
5 . T B 3 -2 A N D T B 3-4 A R E A C S A F E T Y G RO U N D S . A C S A F E T Y G R O U N D B U S IS TO B E C O N N E C T E D TO G RO U N D E D
C IR C U IT O F W IR IN G S Y S T E M O F S IT E U S IN G N O . 6 AW G W IR E T Y P IC A L .
T B 1
T B 2
A I1 P W R
A I1 +
A I1 –
A I2 P W R
A I2 +
A I2 –
A I3 P W R
A I3 +
A I3 –
A I4 P W R
A I4 +
A I4 –
AO 1 +
AO 1 –
AO 2 +
AO 2 –
M O D B U S
C O M
M O D B U S
C O M
D O 1 +
D O 1 –
D O 2 +
D O 2 –
D O 3 +
D O 3 –
D O 4 +
D O 4 –
D I1 P W R
D I1 +
D I1 –
D I2 P W R
D I2 +
D I2 –
D I3 P W R
D I3 +
D I3 –
C O M
+ 2 4 V IN
C O M
S 1
A I1
A I2
A I3
A I4
AO 1
AO 2
D I1
D I2
D I3
V
V
V
V
I
I
IS O
IS O
IS O
I
I
I
I
V
V
N O N
N O N
N O N
O N
O F F
P O W E R
S W IT C H
S 3
1
2
3
4
5
6
7
8
9
1 0
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
2 0
2 0
1 9
1 8
1 7
1 6
1 5
1 4
1 3
1 2
1 1
1 0
9
8
7
6
5
4
3
2
1
1
1
2
2
3
3
4
4
T
B
4
T
B
3
2 0
1 1
1
1 0
T B 1
T B 2
A I1 P W R
A I1 +
A I1 –
A I2 P W R
A I2 +
A I2 –
A I3 P W R
A I3 +
A I3 –
A I4 P W R
A I4 +
A I4 –
AO 1 +
AO 1 –
AO 2 +
AO 2 –
M O D B U S
C O M
M O D B U S
C O M
D O 1 +
D O 1 –
D O 2 +
D O 2 –
D O 3 +
D O 3 –
D O 4 +
D O 4 –
D I1 P W R
D I1 +
D I1 –
D I2 P W R
D I2 +
D I2 –
D I3 P W R
D I3 +
D I3 –
C O M
+ 2 4 V IN
C O M
S 1
A I1
A I2
A I3
A I4
AO 1
AO 2
D I1
D I2
D I3
V
V
V
V
I
I
IS O
IS O
IS O
I
I
I
I
V
V
N O N
N O N
N O N
O N
O F F
P O W E R
S W IT C H
S 3
1
2
3
4
5
6
7
8
9
1 0
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
2 0
2 0
1 9
1 8
1 7
1 6
1 5
1 4
1 3
1 2
1 1
1 0
9
8
7
6
5
4
3
2
1
1
1
2
2
3
3
4
4
T
B
4
T
B
3
2 0
1 1
1
1 0
T B 1
T B 2
A I1 P W R
A I1 +
A I1 –
A I2 P W R
A I2 +
A I2 –
A I3 P W R
A I3 +
A I3 –
A I4 P W R
A I4 +
A I4 –
AO 1 +
AO 1 –
AO 2 +
AO 2 –
M O D B U S
C O M
M O D B U S
C O M
D O 1 +
D O 1 –
D O 2 +
D O 2 –
D O 3 +
D O 3 –
D O 4 +
D O 4 –
D I1 P W R
D I1 +
D I1 –
D I2 P W R
D I2 +
D I2 –
D I3 P W R
D I3 +
D I3 –
C O M
+ 2 4 V IN
C O M
S 1
A I1
A I2
A I3
A I4
AO 1
AO 2
D I1
D I2
D I3
V
V
V
V
I
I
IS O
IS O
IS O
I
I
I
I
V
V
N O N
N O N
N O N
O N
O F F
P O W E R
S W IT C H
S 3
1
2
3
4
5
6
7
8
9
1 0
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
2 0
2 0
1 9
1 8
1 7
1 6
1 5
1 4
1 3
1 2
1 1
1 0
9
8
7
6
5
4
3
2
1
1
1
2
2
3
3
4
4
T
B
4
T
B
3
2 0
1 1
1
1 0