Watts LF007 Serie Instrucciones De Instalación página 6

Kit Installation
Attach the monitoring connection kit to the pressure sensors integrated on the valve assembly
and to the BMS controller feeding pressure measurements to a host processor.
1. Install the connection kit within 8 ft of valve assembly.
(Mounting hardware included.)
2. Plug each sensor cable into one of the three integrated
pressure sensors on the assembly.
Each sensor cable port on the interface module is
labeled for correct connection of the cable to the pres-
sure sensor on the valve assembly. Connect the cables
to the sensors in this order.
Cable 1 to pressure sensor on test cock No. 2.
Cable 2 to pressure sensor on test cock No. 3.
Cable 3 to pressure sensor on test cock No. 4.
3. Connect the 3-conductor data cable to a BMS controller
capable of RS-485 serial communication, using this
terminal assignment.
(B) Black wire
(W) White wire
(G) Green wire
4. Plug the power adapter into a GFI-protected, 110 VAC
electrical outlet.
Interface Module Configuration
The interface module is a voltage input device that contains three inputs for analog voltage pressure
sensors (included with backflow preventer) and a 16-bit analog-to-digital converter to perform
the signal conversion to digital information. The analog-to-digital converter performs a total of 25
conversions per second. The module configuration can be completed by using most any Modbus
master program or the utility software described in the appendix.
Features and Register Assignments
The interface module contains user-selectable communication settings. The user can select
all features such as baud rate, parity type, and digital filtering. (See Table 1 Input Register
Assignments for the complete list of features.) The register map format is used for consistency
with the Modbus RTU protocol, and contains the register numbers in decimal format, register
description, acceptable data values, and the definition of each value.
NOTE: All Modbus register values in the following table are represented as decimal numbers.
Common GND
DATA+
DATA-
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