Thermo Scientific DensityPRO+, Руководство по установке

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Wiring
Serial Communications
Contact Closure
(Switch) Inputs
Two contact closure inputs are included on each I/O board. They are dry
contact inputs between ground and switch 1 and ground and switch 2. The
gauge can be configured to execute a command or other function upon a
user-provided contact opening or closing. Refer to the Den user
guide for details on assigning commands to the contact closure inputs.
Temperature
Compensation
Temperature compensation circuitry with 2-wire or 3-wire 100 ohm
platinum RTD is optionally available. For 9701/9702 scintillation
detectors, connections are made at J19. For 9719B/9720B ion chamber
detectors, connections are made from the temperature compensation board.
For the 1400A/1400S transmitter, connections are made at J1A of the VPI
board installed in the PCB 4 slot. Reference the appropriate installation
wiring diagrams for specific wiring information.
Flow Input
There is a provision on the VPI board for a user-provided 4–20 mA flow
input (pins 6 and 7 of connector J1A). Refer to the Den user
guide for details on how to configure the gauge to use the flow input signal.
Serial
Communications
The transmitter provides one RS232 single-drop serial interface. One
RS485 multi-drop serial interface is optionally available. Screw-terminal
connectors for both ports are located on the CPU board.
The optional RS485 connector (J6) includes the +8 Vdc required to power
the Thermo Scientific HHT as well as the +DATA and –DATA
connections. An RJ-11 (phone jack) connector is also provided for the
RS485 port. The HHT can be connected directly to the RJ-11 connector.
Both the RS232 and optional RS485 ports are always active and provide
independent access to the measurement readings and software functions.
The setup menus, however, can only be accessed by one port at a time. For
information on configuring communications, refer to the Den
user guide.
Thermo Fisher Scientific Den Installation Guide 4-13