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H704
INSTALLATION GUIDE
Z202366-0M
page 2
©2008 Veris Industries USA 800.354.8556 or 503.598.4564 / [email protected]
02081
operation
product diagram
dimensions
Circuit Board and Mounting Bracket
The H704-42 Branch Current Monitor is a current sensing device designed to monitor
all 42 poles of a panel board. Designed for critical load monitoring such as Co-location
Data Centers and lighting panels, the H704-42 provides important branch circuit
amperage and capacity information. By reporting current levels and initiating
capacity warnings and alarms, the H704-42 allows the management of power and
eliminates open circuits caused by overloaded breakers.
The H704-42 consists of a Data Acquisition Board and two 21-unit current sensor
strips. The strips are mounted on each side of the panel board 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 through snap on ribbon cable. An optional hardware kit is available
for mounting the H704-42.
Data is transmitted using an RS485 Modbus protocol. Each Data Acquisition Board is
addressed on the modbus daisy chain network.
Setup is made easy with a PC based configuration tool which allows for global or
individual selection of breaker size, warning levels, and alarm levels.
*For 208/230VAC Power Connection version, order H704-42(H)(E)/H704-42/1(H)(E)
1.
RS 485 2 or 4-Wire Connection:
Daisy chain multiple H704-42's using a 2-wire
or 4-wire modbus network.
2.
Optical Communications Isolation:
Optical isolators are used to separate 120
VAC portions of the circuit from the RS485 network.
3.
Alive LED:
Flashes once per second to indicate correct operation. If steadily lit or
out, indicates internal failure.
4.
50-Pin Ribbon Cable Connectors (Data Acquisition Board):
18-inch (457 mm)
ribbon cables are provided standard** for easy snap connection of current sensor
strips to this point of the Data Acquisition Board.
5.
Control (Mains) Power Connection*:
Easy 2-wire 120 VAC line to neutral 50/60
Hz.
6.
250VAC 100mA Time Delay Fuse:
Fused power connection for circuit protection.
7.
Power Transformers:
Linear power supply for reliability and low noise
8.
Baud Rate & Parity Selection Switches:
Field selectable RS-485 serial interface
control.
9.
Modbus Address Dip Switches:
Each Modbus device must have a unique
address. These switches must be set to assign an individual address before the
device is connected to the network.
10.
TX LED:
Indicates successful transmission of information over the Modbus
network.
11.
RX LED:
Indicates data received on the Modbus network
12.
Current Sensors:
Each current sensor is capable of monitoring conductors
carrying up to a maximum of 50 amps. Maximum wire size capacity is #6 AWG
THHN. H version can monitor up to 100 amps with a maximum wire size capacity
of #2 AWG THHN
13.
50 Pin Ribbon Cable Connectors (CT Strips):
18" ribbon cables are provided
standard** for easy snap connection of Data Acquisition Board strips to this point
of the current sensor strips
*For 208/230VAC Power Connection version, order catalog number H704-42/H704-42/1E.
**Additional sizes are available for sale.
6
4
2
12
10
8
18
16
14
24
22
20
30
28
26
36
34
32
42
40
38
10
11
13
12
Shop for Veris products online at:
1.877.766.5412
www.
PowerMeterStore
.com