Product - MV Panels 

PLC implementation of Firemen Remote Panel (FRP) for MV Fan system of commercial and residential buildings. 

Local Control Panel
Local Control Panel (LCP) is an essential electrical system that connects the control power from the electrical isolator to the motor of the ACMV equipment. It is wired with essential electrical components for safety and electrical protection purposes. Such as MCB and RCB as illustrated in Figure 1. 


lnterlocking Circuits
Apart from safety and protection, the LCP provides the Interlocking Circuits for interface with respective monitoring and control systems of the building, such as:-

  • Firemen Remote Panel (FRP) at FCC Room
  • Building Automation System (BAS) at the Adminstration Office

Controls are implemented using Relay-Logic as illustrated in Figure 2. Provisions for Interlocking Circuits to FRP and BAS systems are in the form of Volt-Free contacts and low voltage signals as shown in Figure 3.  



Cabling Requirement for these Interlocking Circuits is very substantial. For example, for each and every LCP, the requirements are :-

  • To FRP system - 8 x 1C 1mm2 FR Cable
  • To BAS system - 8 x 1C 1mm2 PVC Cable

For MV Fan system with 26 fans, the above interlocking circuits will be multiplied by 26 times. For example, to FRP sysyem 26 x 8 x 1C 1mm2 FR Cable (208). 

lnterlocking Cables from LCP to FRP and BAS System
Figure below shows the Interlocking cables from field local Control Panels to Firemen Remote Panel at FCC and BAS computer in administration office. Cabling From Each and every Local Control Panel to FRP/ BAS system requires:-
  • FRP - 8 x 1c 1mm2 FR cable
  • BAS - 8 x 1c 1mm2 PVC cable


Summary of Cabling Requirements for Interlocking Circuits
  • 83.2 km of 1C 1mm2/ 10.4 km of 1 x 8C 1mm2 FR Cable
  • 10.4 km of 1C 1mm2/ 1.3km of 1 x 8C 1mm2 PVC Cable
  • 800 m of 1P STP 1mm2 PVC Network Cable

As illustrated above, the cabling required is very substantial with tens of kilometers of cables. The strategy in adoption of PLC system for FRP (to save cost) is to collapse these tens of kilometers of cables to a network single cable and at a fraction of the cable length. 

IP2 PLC Implementation 
Automating the LCP with IP2 PLC RTU eliminates the need of Relay-Logic and most importantly to digitize the IO signals. Such that, IO information can be communicated with the FRP and BAS systems electronically using PLC networks and without the need for provisions of physical volt-free contacts and low voltage signals. Figure 6, illustrates the use of IP2 PLC RTU to automate the LCP. IP2 PLC RTU has two (2) Industrial Networks :-
  • CAN Fieldbus Network to FRP 
  • RS485 Modbus Network to BAS


lnterlocking Networks
Cabling Requirement for Interlocking Circuits is now in the form of electronic networks as illustrated in Figure 7.
  • Network to FRP system - 1P STP 1mm2 FR
  • Network to BAS system - 1P STP 1mm2 PVC

Building Automation System 
IP2 PLC RTU units are equipped with RS485 Modbus network. Without any further investments in hardware (eg. BAS DDC Controllers), the BAS system can be implemented by using any Off-the-shelf PC-based SCADA software. Huge Savings.


Summary of Cost Savings with MV Panels 
Tens of kilometers of FR cables can be collapsed into mere few hundreds of meters of network cable.


Application Note for MV Fan Automation [ Brochure ]

Application Note for MV Panels [ Brochure ]

On-line technical support available to assist in design of single line drawings.