J-1 INTRODUCTION
The FenwalNET Network Interface Card (NIC) provides the capability for peer-to-peer communication between the FN-2000 fire/suppression control panels (nodes).
The NIC mounts as a daughter card on the FN-2000 Central Control Module (CCM). Up to 32 nodes may be networked to form groups. Groups are numbered, logi-cal groupings that delineate the extended coverage area and simplify programming.
KIDDE-FENWAL, INC. ASHLAND, MA 01721
D
NETWORK INTERFACE CARD CAT. NO. 74-200036-001
TB3
R43R42
U6 R18
RV11R24
RV12E8 RV10
RV8 RV6
E4E7
R25 R5R6
R20 R22
RV5 RV4
E3 E2E5E6 R4 R3
R36 C18 R13
R2
Figure J-1. Network Interface Card (NIC) Each FN-2000 control panel which is a network node (i.e., equipped with a NIC) may be assigned to a desig-nated network group (numbered 1 through 32) or to network group 0. When an event occurs at a node, noti-fication of the particular alarm, trouble, abort, etc., will be delivered to each of the other nodes on the network in the form of a message.
J-2 CONFIGURATION/ADDRESSING
J-2.1 Overview
Each node can be configured independently using any of the three methods described in the following para-graphs. The configuration process is dealt with in more detail in the Fenwal Configuration Software (FCS) Program User's Guide (74-225), which should be re-ferred to.
Note: It is not possible to download configuration in-formation to all the NICs on a network simulta-neously. Each NIC (node) must be configured independently.
The operator can set network configuration options on the FN-2000(s) in three ways:
Via the keypad on the Central Control Module.
Via FCS.
Via a dumb terminal.
Below are the network options which can be configured for each node and which are stored in that panel's memory. Paragraphs detailing each option follow.
Network Style: None, Single-Channel (Style 4), or Redundant Channel (Style 7)
Node number: 0 to 32
Network group number: 0 to 32
Processing of network RESET messages:
Enabled/Disabled
Processing of network SILENCE messages:
Enabled/Disabled
Logging all events: Enabled/Disabled
Time resynchronization (resynch) period
Central Station
J-2.1.1 NETWORK STYLE
The two independent data channels can be enabled (Style 7) and disabled (Style 4) independently. These data channels transmit network information from one node to the next, or bi-directionally if nodes are connected on either side of the transmitting node. In Style 7 configu-ration, data transfer is redundant so that if there is a failure on one channel, or its cable, the other channel will maintain communication.
J-2.1.2 NODE NUMBER ASSIGNMENT
Nodes may be assigned a number from 0 to 32. Num-ber 0 (the default) means that the node does not par-ticipate in any network activity. Any assignment from 1 to 32 means that the node actively participates in all pre-configured network activity.
J-2.1.3 NETWORK GROUP NUMBER ASSIGNMENT
Nodes may be assigned to groups 0 through 32. A node assigned to network group 0 receives and processes mes-sages received from all nodes only if configured to Log
All Events. A node assigned to groups 1 through 32 will process only those messages from nodes in the same network group unless configured to Log All (Network) groups .
J-2.1.4 RESET ENABLE/DISABLE
Enabling RESET on a node means that it can be reset from any other node in its group. If it is assigned to network group 0, it can be reset from any node on the network.
J-2.1.5 SILENCE ENABLE/DISABLE
Enabling SILENCE on a node means that it can be si-lenced from any other node in its group. If it is assigned to network group 0, it can be silenced from any node on the network.
J-2.1.6 EVENT LOGGING ENABLE/DISABLE Enabling Log All Events causes all network events to be logged at this node. This includes the receipt of an ACKNOWLEDGE from a button on a remote node. Dis-abling will result in logging events only in its own (non-zero) group.
J-2.1.7 TIME RESYNCHRONIZATION PERIOD (SET IN MINUTES)
A time-resynchronization message is broadcast on the network at intervals determined by the resync period. If a node does not receive a resynchronization message dur-ing this interval, it uses its network connection to ask for the time or uses its own locally stored time if its query does not result in a resynch message.
J-2.1.8 CENTRAL STATION OPERATION
A node can be configured as a central station if that node is properly connected to a Silent Knight DACT, Model 5104. Central Station configuration automatically forces that node to Log All Events and also MP04, a volt-free relay on the CCM, is configured to activate on any alarm on any node in the network.
J-2.2 Configuring Networking Options via the Display/Keypad
Configuration can be performed through the System's menus which are accessible using a panels built-in membrane keypad and the LCD display panel. The soft-ware will initially use default values with networking style set to None until changed by an operator.
Figure J-2. FCS Network Menu
J-2.2 FenwalNET-2000 Panel Network Menus The menu structure of the FN-2000 has been upgraded to accommodate network configuration. All of the net-work options listed in Paragraph J-2.1 are configurable via the front panel membrane keypad. In addition, the menu provides the ability to add or remove individual or groups of nodes to/from the network. The additions to the FN-2000 menu structure are diagramed in Figure J-2.
J-2.3 Configuring Networking Options via FCS Configuration of all CCM parameters, including network parameters, can be accomplished using FCS. The soft-ware will initially use default values, with networking Style set to None until changed by an operator.
See the Fenwal Configuration Software (FCS) Program User's Guide (74-225) for details.
J-2.4 Configuring Networking Options via a
Dumb Terminal
Control panel configuration can be performed through use of the System's menus using a dumb terminal at-tached to the serial PC Port. The software will initially use default values with the networking style set to None
until changed by an operator.
Note: Menus cannot be accessed with an alarm condition in effect.
J-3 OPERATION
Networked FN-2000 panels may be configured to com-municate differently depending on:
Whether they are assigned to network group 0 or to groups 1 through 32,
Whether they are communicating with other panels in their local group,
Whether they are with panels in a remote group.
Table J-1 sets forth these relationships. In more detail, however:
A node which receives the network message from another node in the same non-zero group, will pro-cess the network message appropriately, depending on its own installed program. The ACKNOWLEDGE function will be automatic, the SILENCE and RE-SET functions must be enabled in Fenwal Configu-ration Software (FCS), or by using the panels membrane keypad and LCD display panel.
A node in a different non-zero network group config-ured to log all groups will process network message(s) from any node in the entire network, depending on its own installed program. ACKNOWL-EDGE is automatic, however SILENCE and RESET functions must be enabled in Fenwal Configuration Software (FCS), or by using the panels membrane keypad and LCD display panel.
A node in network group zero, the default group, will not be recognized by any other nodes in net-work group zero for functions other than receiving messages, unless it is configured to log all groups in Fenwal Configuration Software (FCS).
Refer to Table J-1 for a summary of these relationships.
Nodes can be added or deleted from network only via Network Menu.
J-4 FUNCTIONAL DESCRIPTION
This section describes the hardware used to implement the FenwalNET Network:
Central Control Module (CCM) CPU Board
Network Interface Card (NIC)
Network Wiring Table J-1. Network Configuration Table
n
J-4.1 Central Control Module CPU Board
The CCM board is a slightly modified version of the origi-nal CPU board designed so that the NIC will plug in as a daughter board. This modification has no effect on normal operation of the FN-2000 panel or system.
J-4.2 Network Interface Card (NIC)
The NIC contains the hardware necessary for data-com-munication between network nodes. The channel is an EIA-485 bus line. Each node uses one (1) NIC. The NIC performs the following functions:
Dual Channel Support
Messaging
Repeater
Fail Safe
Isolation
TA1 ISOLATED
NETWORK MEDIUM
TA2
NON-ISOLATED NETWORK MEDIUM Hardware
Repeater Logic Rx/Tx Selection
Logic
1/2 NETWORK INTERFACE CARD (NIC)
To CCM CPU
TB2 TB1
Rx out Rx out
Tx in Tx in
Driver
Enable Driver
Enable
RTS Rx Tx
Figure J-3. NIC Block Diagram (Shown With Power To NIC Lost) J-4.2.1 DUAL CHANNEL SUPPORT
The NIC optionally supports operation of Style 4 or Style 7 channels. Under normal operation with Style 7, net-work communication is divided between the two chan-nels. In case of a short circuit or a break in any of the connecting wires, either channel by itself can execute all network communications, although somewhat more slowly than if both channels are in operation.
J-4.2.2 MESSAGING
When a node wishes to transmit over a network chan-nel, the data is written to the NIC which sends the sig-nals out to the bus for receipt by remote NICs. While a node is not transmitting data, the NIC reads the bus data traffic and converts it to a form readable by the nodes software. Data communication will be configured on the NICs UART as 8-bits, no parity, 1 stop bit
(8-N-1) and 9600 baud. The NIC will either transmit locally produced data or receive and re-transmit bus activity as a repeater.
J-4.2.3 REPEATER (TRANSCEIVER)
The NIC acts as a repeater, regenerating bus informa-tion as it moves through the NIC. Its bi-direcinforma-tional re-peater function is implemented completely in hardware;
no software is needed to control this process. The transceivers transmit and receive switching (in half-duplex mode) is also performed automatically by hard-ware.
J-4.2.4 FAIL SAFE
If a power failure occurs in a node, the NIC includes a normally closed (NC) relay which maintains the com-munications integrity of the network. When the NIC loses power, the relay passes the network signals directly through the board. While the node without power will not participate in networking, this pass-through func-tion allows all other network nodes to funcfunc-tion normally while providing the proper trouble indications.
J-4.2.5 ISOLATION
One half of each channel is an isolated, floating RS-485 transceiver and the other half is a non-isolated, grounded RS-485 transceiver. This assures that the chassis of any two nodes are physically disconnected eliminating the possibility of ground-loop current, while retaining the ability to detect ground faults.
J-4.3 Network Wiring
The panels are networked by attaching two shielded, twisted-pair cables between the appropriate NICs. The node-to-node wire must not exceed a length of 4000 ft.
and must be AWG 18 or heavier gauge. Under adverse conditions (for example, high electrical noise) shielded twisted pairs may be required. Connect panels together as shown in Figure J-4.
B1IA1 B2IA2 B1NA1 B2NA2
NETWORK INTERFACE CARD
CCM CPU BOARD
FenwalNET 2000 PANEL FenwalNET 2000 PANEL
B1IA1 B2IA2 B1NA1 B2NA2
NETWORK INTERFACE CARD
CCM CPU BOARD Channel 1
Channel 2
Note A Note B
Note A: Attach the shields on the 'N' side of the network line to the grounding screw on the CCM.
Note B: The shields on the 'I' side of the network line are to be cut short and left floating.
Figure J-4. Network Wiring
J-5MAINTENANCE AND/OR REPLACEMENT
No maintenance is required. In the event of failure, the module should be returned to the factory for repair or replacement.
J-6 PARTS LIST
The NIC Installation Kit (P/N 74-200036-500) con-sists of the following:
n
J-7 INSTALLATION
The NIC is installed as a daughter board to the CCM board. After this is accomplished, the panels are wired together using shielded, twisted-pair cable, AWG-18 or heavier. Shielded twisted pair is recommended to re-duce interference caused by electrical noise in the vicin-ity of the wires.
For full Style 7 operation, two shielded twisted-pair cables must connect each pair of panels, as shown in Figure J-4. Single-channel operation (using only one twisted pair cable between NICs) is possible and pro-vides Style 4 operation. With single-channel operation, an open circuit on any network wire will effectively break the network into two separate peer-to-peer networks, both functional and both reporting troubles.
J-7.1 NIC Installation CAUTION
!
FenwalNET 2000 System installation applications require that when a NIC is installed, pre-discharge and release-state activation, as well as abort-state activation are limited to the originating fire-alarm control panel.
Note: Determine whether you have a newer or older CCM; a new CCM can be recognized by a single-line 20 pin header on the top edge on right side of board. If the networking upgrade is for an older system, the new CCM and Network Inter-face Card (NIC) will be separate. First replace the old CCM with the new CCM and then install the NIC. See following instructions for NIC installation.
CAUTION
!
Many electronic components are subject to damage from electrostatic discharge (ESD).
These components are not to be removed from their protective wrappings until they are to be installed in their respective equipment locations and then only by personnel connected to earth ground.
Note: For proper network configuration, it is neces-sary to use version 7.X of FCS, FenwalNET Con-figuration Software. For complete information on this aspect of installation see the FenwalNET Configuration Software (FCS) Program Users Guide (P/N 06-235855-001). As of this date, version 7.X of FCS is required for proper configuration.
J-7.2 Required Tools
Some or all of the following tools will be required to perform removal and installation.
1. Small flat-blade screwdriver.
2. 6" flat-blade screwdriver.
3. No. 2 Philips screwdriver.
4. Wire striper.
5. Small needle nose pliers.
6. Ground strap (wrist strap) for ESD protection.
7. IC chip extraction tool.
J-7.3 Central Control Module.
The FN-2000 panel will be delivered with a separate network interface card; some existing panels can also can be retrofitted with a network interface card. Follow-ing are instructions both for replacement of complete CCM modules and for installing a NIC in an existing CCM module. The CCM module consists of both the CPU panel and its attached LCD display and keypad assembly.
J-7.4 Removing And Replacing A Complete CCM Module
The old CCM module can removed as a whole and re-placed with a new module. The following provides the procedure for removing the and replacing a complete CCM module
1. Ensure that all programming is saved using Fen-walNET Configuration Software (FCS). For the proper procedure, see the FenwalNET Configuration Software (FCS) Program Users Guide (P/N 06-235855-001).
2. Ensure that the power supply EPROM is of a ver-sion compatible with FenwalNET networking. See Note above.
3. Put on a properly grounded ESD-protective wrist strap.
4. Disconnect plugs from the I/O Port and Rx/Tx port, and P.C. port (if connected to an Intelligent Interface Module [IIM]). Make note of each wire and cable con-nection for use during re-assembly.
5. Remove the remaining wiring from CCM panel.
6. Remove the six mounting screws while holding the CCM assembly in place.
7. Remove CCM assembly from cabinet.
8. Remove new CCM assembly from packing and in-spect for physical damage. If undamaged,
9. Install new CCM in the reverse order of removal mak-ing sure that each wire and cable is properly re-connected.
10. Reinstall programming and configure the network using FCS. See J-2.
J-7.5 Installing a NIC in an existing CCM Module
1. Ensure that all programming is saved using FCS software.
2. Put on a properly grounded ESD-protective wrist strap.
3. Remove power from panel but be sure the chassis remains grounded.
4. Remove 4 nylon screws holding membrane keypad and remove membrane by pulling it straight out of its connector.
5. Remove the 6 threaded spacers that secure the dis-play electronics board and lift board out. Do not disconnect boardlet it hang down. Data and power lines will remain connected.
6. Insert the three plastic standoffs that were included with the NIC into the holes shown in Fig J-5.
7. Carefully plug the NIC into the 20-pin receptacle and onto the plastic standoffs.
8. Secure upper right corner of NIC with long screw and spacer. Spacer will separate NIC and the CCM board and screw will go through to the panel.
9. Replace the display electronics board and re-attach the six threaded spacers.
10. Carefully plug in the membrane keypad and attach the four screws. Make sure pins and receptacle are properly aligned.
11. Attach network wiring as previously described.
12. Reinstall programming and configure the network using FCS. See J-2.
PORT P.C.
PORT PRINT PORT DISP
PORTI/ORX/TXPORT
INSERT PLASTIC STANDOFFS HERE FOR NIC
DISPLAY PORT PRINT PORT P.C. PORT
I/O PORT Rx/Tx PORT
LONG SCREW AND SPACER THROUGH HERE
Figure J-5. CCM Board Showing NIC Attachment Points J-7.6 Replacing Firmware Chips
For complete instructions, see FN-2000 Firmware Upgrade datasheet (P/N 06-235742-001). This document covers both CCM EPROM and power supply EPROM replacement.
Be sure to follow ESD prevention procedures.
J-8 POWER SUPPLY REQUIREMENTS
The NIC is powered by the panel to which it is attached via the CCM board. No other power connections are required.
J-9 TESTING
Testing is a function of the FN-2000 System in which the NIC is installed. No local test functions exist. For more informa-tion on testing the NIC and the network, see the Fenwal Con-figuration Software (FCS) Program User's Guide.
J-10 SPECIFICATIONS
Input Voltage 24 Vdc Supervisory Current 50 mA max.
Alarm Current 50 mA max.