Jeddah Central Development
Detailed Master Planning and Engineering
F. Vacuum Relief Valves: Brass or plastic housing, with corrosion-resistant internal parts.
2.16 FIELD CONTROLLERS
A. The central control system shall be responsible for the monitoring of the equipment’s under contract
scope of work and override local control with manual commands locally from field controller.
B. Central control system will be consisting of workstations related to the irrigation control system
located in the central control room and servers related to the irrigation control system located in the
server rooms. – to be checked by Ahmad
C. All field controllers shall be field programmable. The field controllers shall be modular units capable
of processing local control. It shall control and monitor the pumps, valves and flow sensors
connected to it.
D. The field controller shall be smart and have the intelligence to accumulate data and make decision
locally. Comprehensive standard application development and diagnostic program shall be used for
programming the field controller locally or remotely. The Irrigation Central Control System shall
use a communication protocol, compatible with the distributed irrigation field controllers and
Remote Terminal Unit, allowing real time, two-way communication between the central and field
controller. The communication shall be direct with central without any field interface unit.
E. The field controller shall be installed in a weatherproof enclosure equivalent to IP55standards. The
field controller shall have solid-state design utilizing touch screen/ liquid screen display. The
processor module (CPU) shall be real time process controller and shall support the Data transfer
with I/O modules, system memory allocation, and communication port protocol. The CPU shall
allow LAN capabilities. The field controller shall be supplied with required number of Input / Output
points and shall include the following minimum configuration: i. Mother Board ii. Input /Output
(I/O modules or Boards. iii. Power supply iv. Radio Communication Interface, if specified. v.
Combination of radio, telephone & hardwire board. Provided with suitable patch panel, media
converter, ethernet switch (as needed), power supply modules, all rated for the environmental
conditions required for this project and can withstand a maximum temperature of 70-degree C.
F. The field controller shall have independent control over each station start time, duration of irrigation
(maximum 99 hours, 59 minutes, 59 seconds), days of operation and cycle length (1 to 30 days),
and exempt station operation by day of week or by date. .A “mimic” function shall provide the
ability to copy station timing to any other station. The field controller must operate at ambient
temperature range of 30 to 60 °C with relative and humidity up to 95 %.
G. The field controller shall carry irrigation programs with the following minimum capabilities and
requirements:
1. Control Irrigation system based on time and quantity.
2. Control Irrigation system based on climate and/or soil moisture.
3. Initiate alarms based on high flow, low flow, main line leak.
4. Flexible programming to change valve set combinations.
5. Possibility to create programs based on conditions.
6. Run/Stop main line.
7. Local or host control may be initiated at the keypad along with satellite address.
8. Universal water budget may be modified from 1% to 300% in one percent steps.
PLANTING IRRIGATION 328400 - P a g e | 13-23
JCD400-GEN1-DDD-DAR-ENV-SPC-00001-00
