NetSure
™
-48V DC Power System
Quick Start Guide, QS582127000 (Issue AC, December 10, 2013)
Spec. No: 582127000
Code: QS582127000
Model No: 721
NPBB
Issue AC, December 10, 2013
[28]
Figure 22.
IB2 (Interface Board) Connections
* The ACU+ relay assigned to “Critical Summary” alarm (relay 1 by default)
will operate in the “Fail Safe Mode”. “Fail Safe Mode” means Relay 1 is
de-energized during an alarm condition, opening the contacts between the
C and NO terminals, and closing the contacts between the C and NC terminals.
The ACU+’s remaining seven (7) relays energize during an alarm condition, closing
the contacts between the C and NO terminals, and opening the contacts between
the C and NC terminals.
Not all I/O points are available for customer connection (some are used for factory
system connections).
J3-J9:
Wire Size Capacity: 16-26 AWG.
Recommended Torque: 2.2 in-lbs.
M
A4
C
5U
31
IB
2
DI1-
DI1+
DI2-
DI2+
DI3-
DI3+
J3
J4
J5
J6
J7
J8
J9
DI4-
DI4+
DI5-
DI5+
DI6-
DI6+
DI7-
DI7+
DI8-
DI8+
DO1_NC
DO2_NC
DO1_COM
DO2_COM
DO1_NO
DO2_NO
DO3_NC
DO4_NC
DO3_COM
DO4_COM
DO3_NO
DO4_NO
DO5_NC
DO6_NC
DO5_COM
DO6_COM
DO5_NO
DO6_NO
DO7_NC
DO8_NC
DO7_COM
DO8_COM
DO7_NO
DO8_NO
J1
1
1
J1
1
2
J1
1
3
J1
2
1
J1
2
2
J1
2
3
2
4
3
1
J2
6
5
4
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
ST
U
PT
U
O
Y
AL
E
R
ST
U
P
NI
LA
TI
GI
D
Schematic Diagram of IB2 Board
IB2 TEMP
PROBE 1
IB2 TEMP
PROBE 2
-
J1
2
*
R
E
LA
Y
S
W
1
7
J2
J1
1
5
3
1
R
el
ay
O
ut
pu
tT
er
m
in
al
Bl
oc
ks
D
ig
ita
lI
np
ut
Te
rm
in
al
Bl
oc
ks
J9
J8
J7
J6
J5
J4
J3
8
6
4
2
8
7
6
5
4
3
2
1
+
IB
2
Bo
ar
d
(T
op
Vi
ew
)
N
O
C
N
C
N
O
C
N
C
N
O
C
N
C
N
O
C
N
C
N
O
C
N
C
N
O
C
N
C
N
O
C
N
C
N
O
C
N
C
5
3
1
4
6
2
5
3
1
4
6
2
5
3
1
4
6
2
5
3
1
4
6
2
5
3
1
4
6
2
5
3
1
4
6
2
5
3
1
4
6
2
C
on
ne
ct
or
to
AC
U
+
IB
2
TE
M
P
PR
O
BR
E
1
IB
2
TE
M
P
PR
O
B
E
2
IB2 Board Assembly
