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B R A N C H C I R C U I T M O N I T O R I N G I N S TA L L AT I O N A N D C O M M I S S I O N I N G I N S T R U C T I O N S
—
ASPMETER solid core
Operations
The ASPMETER series branch current monitor is a device
designed to measure the current, voltage and energy
consumption of up to 46 circuits (42 branch circuits, one
3-phase main and one neutral).
The ASPMETER consists of a data acquisition board and two
21-unit current sensor strips, with four auxiliary inputs. The
strips are mounted on each side of the panelboard along the
termination points of each breaker. The conductor passes
through the appropriate current sensor before terminating
at the breaker. Each strip transmits the current data to the
data acquisition board.
Data is transmitted using an RS-485 Modbus protocol.
Each data acquisition board requires one Modbus address
for the set of two current sensors and four auxiliary inputs.
Data is updated roughly every two seconds. As a circuit
approaches the user-defined threshold, the ASPMETER
activates the alarm indicators.
The ASPMETERA measures both current and power for the
mains and branch circuits. The ASPMETERB measures both
current and power for the mains, and current only in each
circuit. The ASPMETERC measures current only for the mains
Dimensions
and branch circuits.
Dimensions
Dimensions
Circuit Board and Mounting Bracket
Circuit Board and Mounting Bracket
8.3"
Dimensions
Circuit board and mounting bracket
(211mm)
8.3"
(200mm)
(211mm)
7.9"
Circuit Board and Mounting Bracket
(200mm)
8.3"
(211mm)
7.9"
(200mm)
3.9"
(100mm)
3.9"
(100mm)
Ø=0.2"
3.9"
(5mm)
7.3"
(100mm)
Ø=0.2"
(184mm)
(5mm)
7.3"
8.9"
(184mm)
(288mm)
8.9"
(288mm)
Ø=0.2"
(5mm)
7.3"
(184mm)
Solid-Core CT Strips
8.9"
Solid-core CT strips
(288mm)
Solid-Core CT Strips
Solid-Core CT Strips
2.0"
(50mm)
2.0"
(50mm)
0.4" (10mm)
2.0"
(50mm)
7.9"
5.8"
(146mm)
4.8"
5.8"
(122mm)
(146mm)
4.8"
(122mm)
1.75"
(45mm)
5.8"
(146mm)
1.75"
4.8"
(45mm)
(122mm)
1.75"
(45mm)
25.0" (635mm)
25.0" (635mm)
slot: 0.25" x 0.5"
(7 x 13mm)
slot: 0.25" x 0.5"
(7 x 13mm)
25.0" (635mm)
0.4" (10mm)
1.0" (26mm)
slot: 0.25" x 0.5"
opening
on center
(7 x 13mm)
1.0" (26mm)
opening
on center
Product Diagrams
Product Diagrams
Product diagrams
1
Product Diagrams
1
1
2
2
3
2
3
4
4
3
4
1. 50-pin ribbon cable connectors (data acquisition board):
18 inch (457 mm) ribbon cables are provided for easy
connection of current sensor strips to this point of the
data acquisition board.
NOTE: Connect CT strips to the correct ribbon cable
connectors for each panel. The top connector is for
strip A, and the bottom connector is for strip B.
2. Auxiliary inputs: These 0.333 V AC inputs are used for
monitoring the main breaker or other high amperage source.
3. Control (mains) power connection: Easy 2-wire 90–277 V AC
50/60 Hz connection.
4. Control power fuse: 600 V AC, 500 mA time lag, factory-
replaceable.
5. Alive LED: Red/green/amber LEDs. Blink codes are on page 7.
6. Voltage taps: 1, 2 or 3 phase plus neutral connections.
For voltage sensing and power calculations (no voltage
taps on the ASPMETERC).
7. Communications address DIP switches: Each Modbus device
must have a unique address. Switches are binary weighted.
Left-most switch has a value of 1; right-most switch has
a value of 128.
8. Communications settings DIP switch: Configures baud rate,
parity, 2-/4-wire communications.
9. RS-485 2 connection: Used for Modbus serial communications.
The universal plug accommodates 2- or 4-wire connections.
10. RS-485 LEDs: The RX LED (closest to DIP switches) indicates
the RS-485 is receiving information; the TX LED (farthest from
DIP switches) indicates transmission of information.
1.2"
(31mm)
11. Power LED: Indicates power to main board
1.2"
12. Current sensors: Each current sensor is capable of monitoring
(31mm)
conductors rated up to a maximum of 100 amps.
13. 50-pin ribbon cable connectors (current sensor strips):
1.2"
Connects current signal from the sensor strip to the main
(31mm)
board via the ribbon connectors.
A
A
B
B
A
7
8
B
5
7
8
5
11
11
8
7
10
5
10
11
6
10
6
6
2
2
12
9
12
2
9
13
12
9
13
13
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