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34 Operation
Figure 31 Wiring diagram and pin assignment of terminal blocks TB5 and TB6, and connectors P1 to
P26
Connectors
Twenty-six connectors to interface with external equipment as follows:
• P1 to P24: signaling between the controller and the rectifiers
• P25: interface with the main power system shunt
• P26: interface with an AC monitoring device
Refer to
Figure 31
for the pin assignment of connectors P1 to P26.
Eight connectors (J1 to J8) for the interface between the two circuit boards of the controller (for
factory use only).
4.3 MPS300 and MPA100 Power Shelves
The MPS300 power shelf provides the interconnecting points for all the AC, DC and control
cabling and wiring for three Helios Rectifier 100/48. The MPA100 power shelf does the same for
one Helios Rectifier 100/48.
Refer to the appropriate rectifier user manual listed in
6.0 - Reference Documents
for detailed
operation information on the MPS300 and MPA100 power shelves.
–48 (ABS)
VR–
VR+
GRD
To office alarm circuit
or alarm reporting
circuit, if required
Battery sense
leads
C
NC
NO
C
NC
NO
To meter & selector
panel (NT6C10AA),
ABSF
TR
RECT FAN
RECT FAN
To office alarm circuit
Input from office
remote circuit
To office alarm circuit,
If required
NE-1451X cable
(or equivalent)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
TB5
TB6
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
P1 TO P24
P25
P26
EQL ( )
RG+ ( )
RC- ( )
TR ( )
FAN ( )
HVSD ( )
RFA ( )
To
rectifier
NT6C43PA
or
NT6C43PB
card as
required,
or directly
to rectifier
22GA 8-conductor
shielded cable
NC
NC
SHUNT +
SHUNT –
NC
NC
NC
Main
plant
shunt
(the shunt
wires should
be fused near
the shunt to
prevent fire
hazard)
22GA 2-conductor
shielded cable
NC
circuit
ALM
GRD
To AC
monitor
such as
NT6C18BA
AUX1 INPUT (MAJ)
AUX2 INPUT (MIN)
GRD alarm signals from
auxiliary equipment as
required
BOD
BOD
GRD
To office alarm circuit
To load as required
LP (–48V)
–48V (SPARE 2)
-48V (METER)
NE-1451X cable
(or equivalent)
–48 V CHG busbar
–48V
10 AWG
Power plant
busbars
NC
NC
NC
NC
10 AWG
interface
if so equipped
To cabinet alarm lamp
To alarm
interface
board or
rectifier
interface
card as
required,
or
directly
to
rectifier