The FenwalNET 2000 system is capable of substan-tial expansion in the number of RX/TX loops, I/O mod-ules and system output power. The system will support up to 16 I/O modules for single loop and 23 I/O mod-ules for multi-loopa maximum of eight of any one type of module. The system power supply monitor module can supervise two power supply units (4 Amps each -total of 8 Amps per module) which allows for up to 64 Amps of 24 Vdc power. The following diagrams will dem-onstrate the available ways of expanding the system.
Figure B-1 shows the single loop FenwalNET 2000 sys-tem (P/N 74-200000-001). This includes the Central Control Module (CCM), Receiver/Transmitter (RXTX) module, Power Supply/Charger assembly and the sys-tem enclosure. The basic syssys-tem can be expanded as shown in the following sections.
Figure B-1. Single Loop
Figure B-2 shows the single loop FenwalNET 2000 Sys-tem with the optional I/O motherboard (P/N 74-200007-001) installed. The I/O motherboard provides the System with mechanical and electrical interfaces for up to eight I/O modules of any style. The I/O modules are installed by inserting them into the desired motherboard slot and fastening with the two screws provided.
The FenwalNET 2000 ML (Multiloop) system (P/N 74 -200000-100) looks much the same as the system in Fig. B-2, with the exception of the multi-loop motherboard (P/N 74-200017-001) in the place of the basic motherboard (P/N 74-200007-001). The multi-loop motherboard has the ability to connect up to eight RX/TX loop controllers, for a maximum of 2040 intelli-gent addressable points per system.
Figure B-2. Single Loop with Motherboard Figure B-3 shows the FenwalNET 2000 System with an auxiliary power module (P/N-74-200009-002) installed.
The auxiliary power supply module provides an addi-tional 4 Amps of 24 Vdc power for a total of 8 Amps for system use. The unit would be installed if the System required more than the base system's 4 Amps of 24 Vdc power. When the auxiliary module is installed the system batteries are moved to a battery cabinet. P/N 74-100017-001 is an UL listed battery enclosure for use with the FenwalNET 2000.
This figure could also be a multi-loop system with the inclusion of the multi-loop motherboard and additional RX/TX loop controllers.
Figure B-3. System with Aux. Power Supply Module Figure B-4 shows an expanded single loop FenwalNET 2000 System which contains two motherboard assem-blies, three complete power supply assemblies (24 Amps of 24 Vdc power) and up to 16 total possible I/O mod-ules. The I/O bus interconnections between the two motherboards are done using six conductors from the I/O bus terminal block on the motherboard in the main enclosure to connect to the same terminal block on the motherboard in the expansion enclosure. This connec-tion allows complete supervision of all I/O modules in-stalled on the second motherboard by the CCM in the main enclosure. In the expansion enclosure, 24 Vdc power for the motherboard would derive from one of the power supply assemblies installed in that enclosure. A simple two wire connection is all that would be required.
The power supplies need to be tied to the I/O bus for communications purposes. To accomplish this in the above example, the installer would use a two conduc-tors to connect the (tx) and (rx) of the I/O bus from the motherboard assembly to the power supply. The sec-ond power supply could then be daisy chained to the first to complete the communications connections.
Auxiliary power supplies in the expansion enclosure can share a set of batteries or could support their own set of batteries separately.
Figure B-4. Expanded Single Loop System Figure B-5 shows an expanded FenwalNET 2000 Sys-tem which is capable of having eight I/O modules of vari-ous types and a maximum 24 Vdc power of 40 Amps.
This DC power would be hardwired into signal and re-lease modules whose loading would otherwise cause more than 8 Amps of 24 Vdc current to be drawn from the motherboard during activation.
The hardwire option allows the system installer to pro-vide individual modules with their own power source.
Refer to the particular modules installation diagram in Chapter 7 and also refer to Appendix D for power sup-ply expansion guidelines.
Figure B-5. Expanded Sys. with I/O Modules and P.S.
Note: One main power supply/charger assembly can be used to charge a common set of batteries. All other power supply/charger assemblies can be connected to the common set of batteries in par-allel for backup DC power only. Disable the charging circuit on the additional power sup-ply/charger assemblies by cutting jumper W1.
Be careful not to exceed the maximum charging capacity of the main power supply.
Figure B-6 shows a expanded FenwalNET 2000 System which could have 16 I/O modules and 56 Amps of 24 Vdc power. The figure also displays the flexibility to bring all four power supply assemblies in the second expan-sion enclosure to one set of batteries. In this arrange-ment, one of the four power supplies charges the batteries and all four receive standby power from the batteries. Each power supply must have its own two conductors connected directly to the battery set to meet code requirements. The three non-charging power sup-plies must have Jumper W1 cut to disable their charg-ing circuits. Refer to Appendix D for more details on power expansion.
Figure B-6. Expanded Sys. with I/O Modules & P.S.
Figure B-7 shows an expanded FenwalNET 2000 ML system which could have up to eight RX/TX loop con-trollers and nine I/O modules installed in the two motherboards. The system also has a maximum 24 Vdc power of 24 Amps as shown in the diagram. Refer to appendix D for power supply expansion guidelines.
Figure B-7. Expanded ML Sys. with 8 RX/TX & 9 I/O Modules