Hydro Instruments VPH-10000-1 Series, Instruction And Operation Manual

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TABLE 1: Relay Designations for Vaporizer Alarms and Relays
Parameter Terminal I/O Type Range
Gas Pressure AO1 Output (4-20mA) 0 - 300 psi (21 bar)**
Gas Temperature AO2 Output (4-20mA) 0 - 121°C (0 - 250°F)
Superheat Temperature AO3 Output (4-20mA) 0 - 121°C (0 - 250°F)
Control Water Temperature AO4 Output (4-20mA) 0 - 121°C (0 - 250°F)
Auxiliary Water Temperature AO5 Output (4-20mA) 0 - 121°C (0 - 250°F)
Expansion Chamber Switch DI3 Input (12 VDC) closed = alarm
Pressure Relief Valve Switch DI4 Input (12 VDC) closed = alarm
* Wired from the factory.
TABLE 2: Inputs and Outputs
NOTE: All outputs must also be wired to the appropriate V- (GND) terminal.
**Pressure range can be adjusted but must match the pressure transducer's specifi cations.
4.3 Modbus Information
The VPH-10000-1 can communicate with a SCADA system using Modbus RS-485 communication.
The baud rate, node number and data format of the VPH-10000-1 must match that of the master
SCADA system. See Section III.5 for information on how to access and edit these features. A table
of Modbus integers and their corresponding parameters can be seen in Table 3. For more information
on confi guring Hydro Instruments equipment onto SCADA systems, please refer to the Modbus
Installation and Instruction manual.
Vaporizer Alarm/Relay Board Number Relay Number Recommended Wiring
Electronic Pressure
Reducing Valve 1
CB-8RELAY 1 N.O.
*Refi ll Solenoid CB-8RELAY 2 N.O.
*Circulation Pump CB-8RELAY 3 N.C.
*Magnetic Contactor CB-8RELAY 4 N.O.
Electronic Pressure
Reducing Valve 2
CB-8RELAY 5 N.O.
Superheat Alarm CB-8RELAY 6 N/A
High Pressure Alarm CB-8RELAY 7 N/A
Water Level Alarm CB-8RELAY 8 N/A
Low Water Temperature Alarm CB-2RELAY 1 N/A
High Water Temperature Alarm CB-2RELAY 2 N/A