Veris Industries H8920-4 Install - Manual (Page 2)

Z203509-0C PAGE 2 ©2011 Veris Industries USA 800.354.8556 or +1.503.598.4564 / [email protected] 07111
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H8920-4 INSTALLATION GUIDE
OPERATION
The H8920-4 LONTalk Integration Node allows the integration of Veris Industries
H704 and H663 Series branch current monitors (BCM) with a LON Works control/
monitoring system. The H8920-4 converts the metering data network variables
collected by the BCM as Modbus protocol to LONTalk. Using an indexing technique,
the H8920-4 reports the data from up to 63 BCMs on the downstream Modbus
network. Adjusting an input variable allows selection of the Modbus address of the
desired meter. The data is then recorded before selecting another BCM. The H8920-4
can also be used for binding purposes with a single BCM.
The H8920-4 polls the BCM for its full data set approximately once per second. All
output data network variables are immediately updated with this received data.
Data exchanged between the node and the meter are fully checksummed to ensure
integrity. If corrupt data is detected, the output network variables are not updated
and retain their previous value.
PRODUCT DIAGRAM
TB1
TB2
TB3
TB4
OP
POWER
MB +
SHIELD
B A
SERVICE
RX
TX
TB5
TB6
TB7
TB8 -
LO
N
1. LON Talk Terminal Block : Connect to the LON network at these terminals. This
connection is not polarity sensitive.
2. Shield Terminal Block: Communications shielding for both the LONTalk and
Modbus communications networks.
3. Modbus Terminal Block: Connect to the H704/H663 Modbus network. This
connection is polarity sensitive; ensure correct polarity.
4. 16-24 VAC/DC Power: Two-wire system power terminal block.
5. TX LED: Indicates transmission of Modbus network data
6. RX LED: Indicates reception of Modbus network data
7. Service LED: Standard LON Works Service LED. Used in concert with the Service
Switch to locally view the commissioning status of the device. LED status after the
service switch is pushed:
ON, then OFF solid = Device has been commissioned by a network tool.
BLINK at 1/2 Hz rate = Device has not been commissioned by a network tool.
ON, OFF, then solid ON = Device does not have an application.
8. Identification Service Switch: Standard LonWorks Service Switch. Used in
concert with the Service LED to locally view the commissioning status of the
device.
9. OP LED: Normally on. The OP LED will blink off when there is an incomplete data
exchange between the meter and the LON node. If this LED is always off, then
the meter is not responding to data requests (i.e., the meter is disconnected,
unpowered, or incorrectly wired).