1874-842-C1-001, Rev. B (12/2020)
Battery Sense Wire Kit Field Installation Instructions for 36V and 48V Applications
The following wiring diagrams detail installation of common Alpha
®
Battery Sense Wire Kits in XM2 and XM3 power
supplies. Actual battery placement will vary depending upon enclosure used. Battery No. 1 is connected to the power
supply's negative terminal and to the negative battery sense wire; it is your string reference. Batteries are numbered from
right to left.
36V System
Single String
p/n 874-842-27 (9')
1
2
3
4
5
6
7
8
Incorrect wiring will damage equipment.
CAUTION!
Back of plug
+
-
3A
+
-
2A
+
-
1A
A/B [C/D] NEG
Black, Pin 1
Vbatt 3A [C] 36V
Red, Pin 4
Vbatt 2A [C] 24V
Orange, Pin 3
Vbatt 1A [C] 12V
Brown, Pin 2
To Power
Supply
In-line
Fuse
To Transponder
Battery Terminal Bolt Stack-up Fuse Bolt Stack-up
1/4-20 Nut
1/4-20 × 3/4" Bolt
1/4-20 × 1 1/4" Bolt
(M6 × 30mm Bolt)
1/4-20 × 3/4" Bolt
(M6 x 19mm Bolt)
Battery Sense
Cable or PTS
Battery Sense
Cable or PTS
Battery Terminal
Battery Terminal
Split Washer
Split Washer
Split Washer
Flat Washer
Flat Washer
Flat Washer
Battery Cable
Battery
Cable
Flat Washer
Spacer
Fuse
For proper hardware measurements, refer to the Battery Terminal Bolt Stack-up diagram below
for AlphaCell
®
240XTV, 195XTV or 150XTV batteries. If using AlphaCell
®
100XTV or XTV 18V4
batteries, refer to bolt measurements on page 4.
NOTICE:
2874-842-C1-001, Rev. B (12/2020)
1
2
3
4
5
6
7
8
36V System
Dual String
p/n 874-842-28 (9')
Back of plug
+
-
3A
+
-
2A
+
-
1A
+
-
3B
+
-
2B
+
-
1B
A/B [C/D] NEG
Black, Pin 1
Vbatt 3A [C] 36V
Red, Pin 4
Vbatt 2A [C] 24V
White, Pin 3
Vbatt 1A [C] 12V
Green, Pin 2
Vbatt 3B [D] 36V
Orange, Pin 7
Vbatt 2B [D] 24V
Blue, Pin 6
Vbatt 1B [D] 12V
Brown, Pin 5
To Power
Supply
In-line
Fuse
In-line
Fuse
To Transponder
1
2
3
4
6
7
8
5
9
10
Back of plug
+
-
3A
+
-
2A
+
-
1A
A/B/C/D NEG
Black, Pin 5
Vbatt 3A 36V
Red, Pin 9
Vbatt 2A 24V
Orange, Pin 4
Vbatt 1A 12V
Brown, Pin 10
To Power
Supply
Black (String -) 0VRed
PTS
36V System
Single String
(w/ embedded SAG)
p/n 875-848-20
The following battery wiring diagram features a Smart AlphaGuard™ (SAG) option for 36V
systems.
NOTICE:
In-line
Fuse
To XM3 SAG Connector
3874-842-C1-001, Rev. B (12/2020)
+
-
4A
+
-
3A
+
-
2A
+
-
1A
48V System
Single String
874-841-25 (9')
48V System
Dual String
874-841-24 (9')
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Back of plug
Back of plug
A/B [C/D] NEG
Black, Pin 1
Vbatt 3A [C] 36V
Red, Pin 4
Vbatt 2A [C] 24V
White, Pin 3
Vbatt 1A [C] 12V
Green, Pin 2
Vbatt A/B [C/D] 48V
Brown, Pin 8
In-line
Fuse
To Power
Supply
To Transponder
+
-
4A
+
-
3A
+
-
2A
+
-
1A
+
-
4B
+
-
3B
+
-
2B
+
-
1B
To Power
Supply
To Transponder
Vbatt 1A [C] 12V
Green, Pin 2
Vbatt 2A [C] 24V
White, Pin 3
Vbatt 3A [C] 36V
Red, Pin 4
A/B [C/D] NEG
Black, Pin 1
Vbatt A/B [C/D] 48V
Violet, Pin 8
Vbatt 3B [D] 36V
Yellow, Pin 7
Vbatt 2B [D] 24V
Orange, Pin 6
Vbatt 1B [D] 12V
Blue, Pin 5
In-line
Fuse
In-line
Fuse
The following battery wiring diagrams are for 48V systems typically for an XM2 power supply.
NOTICE:
4874-842-C1-001, Rev. B (12/2020)
The following battery wiring diagrams are for AlphaCell
®
XTV 18V4 batteries.
NOTICE:
The AlphaCell
®
XTV 18V4 does not support the Smart AlphaGuard™ (SAG) battery charge
disconnected and the sense harness replaced with a standard DSM harness connected to the
Battery A/B, C/D connector on the DM3X. If the SAG is still installed, selecting the 18V battery
will result in a SAG Compatibility alarm.
NOTICE:
1
2
3
4
5
6
7
8
+ +
- -
A1
A2
A/B NEG
Black, Pin 1
Vbatt A1 [C] 18V
White, Pin 3
Vbatt A2 [C] 36V
Red, Pin 4
DM3X A/B, C/D
Connector
To Power Supply
Battery Voltage Sense Cable, 2 Battery string (Alpha p/n, 874-842-40)
Green, Pin 2
36V System
2 Battery String
858-061-19 (6')
1
2
3
4
5
6
7
8
Back of plug
To Transponder
In-line
Fuse
Battery Terminal Bolt Stack-up
(for 18V4 batteries)
Fuse Bolt Stack-up
(for 18V4 batteries)
Battery Sense
Cable or PTS
terminal
Optional Battery Cable
Battery Cable from
1/4-20 Nut
1/4-20 × 3/4" Bolt
1/4-20 × 1 1/4" Bolt
(M6 × 30mm Bolt for 18V4)
1/4-20 × 1/2” Bolt
(M6 × 12mm Bolt for 18V4)
Battery Sense
Cable or PTS
Battery Terminal
Battery
Terminal
Split Washer
Split Washer
Split Washer
Flat Washer
Flat Washer
Flat Washer
Battery Cable
from A1(-) to
B1(-)
Flat Washer
Spacer
Fuse
Alpha Technologies Services, Inc. | 3767 Alpha Way, Bellingham, WA 98226, USA
For more information visit our website at: www.alpha.com
© 2020 Alpha Technologies Services, Inc. All Rights Reserved. Trademarks and logos are the property of Alpha
874-842-C1-001, Rev. B (12/2020)
+ + + +
- -- -
B1 B2
A1
Vbatt B2 [D] 36V
Orange, Pin 8
Vbatt A2 [C] 36V
Red, Pin 4
Vbatt A1 [C] 18V
White, Pin 3
Brown, Pin 6
Vbatt B1 [D] 18V
Blue, Pin 7
A/B (C/D) NEG
Black, Pin 1
A2
Green, Pin 2
DM3X A/B, C/D
Connector
To Power Supply
Battery Voltage Sense Cable, 4 Battery string (Alpha p/n, 874-842-41)
36V System
4 Battery String
858-064-19 (6')
Each AlphaCell
®
NOTICE:
1
2
3
4
5
6
7
8
Back of plug
To Transponder
1
2
3
4
5
6
7
8
+ +
- -
In-line
Fuse
/
