1.1 The Network Communications Module for Wire (NCM-W)

Figure 1 NCM-W: This diagram illustrates the NCM-W module. Key components include Ground Fault Detection Switches, Network End-of-Line Termination Resistor Switches, Diagnostic LEDs, Network Connection Ports (NUP), and Channel A & B Connections. Some ports are labeled "Not used".

• Supports twisted-pair wire medium.
• NFPA Style 4 (Class B) operation or NFPA Style 7 (Class A) operation.
• Two programmable data thresholds.
• Transformer coupling provides electrical isolation between nodes.
• Pluggable terminal wiring with strain relief.
• Pluggable service connector (feeds signal directly through) in the event that power must be removed from a node.
• 312.5 Kbaud transmission rate.
• Data is regenerated at each node.
• Two network ports to allow simultaneous connection to fire alarm control panel and to programming computer.
• Enables software and database upload/download over NOTI•FIRE•NET™.
• Refer to the NOTI•FIRE•NET™ Manual (Network Version 4.0 and Higher) for wiring length and threshold information.

1.2 The Network Communications Module for Fiber (NCM-F)

Figure 2 NCM-F: This diagram illustrates the NCM-F module. Key components include Diagnostic LEDs, Network Connection Ports (NUP), and Channel A & B Connections. Some ports are labeled "Not used".

• Supports fiber-optic medium.
• NFPA Style 4 (Class B) or Style 7 (Class A) operation.
• Data is immune to all environmental noise.
• Optical isolation prevents ground loops.
• NOTI•FIRE•NET™ fiber optic medium.
• Fiber type:
  • 62.5/125 micrometers (multimode, 8 dB limit)
  • 50/125 micrometers (multimode, 4.2 dB limit)
• Wavelength (1): 820 nanometers. (Use standard 850 nm fiber.)
• Connectors: ST® Style (ST® is a registered trademark of AT&T).
• 312.5 Kbaud transmission rate.
• Data is regenerated at each node.
• Two network ports to allow simultaneous connection to fire alarm control panel and to programming computer.
• Enables software and database upload/download over NOTI•FIRE•NET™.

2.1 Interconnecting the NCM-W

When wiring consecutive NCM-W boards, wiring may enter or exit at Port A or Port B. NCM-W port-to-port wiring is not polarity sensitive. The use of Port A or Port B is arbitrary. An NCM-W may be connected to any of the following devices:

• MIB-W
• MIB-WF
• NAM-232W
• NCM-W (in another panel)
• NCS-W network connection
• RPT-W
• RPT-WF

For information regarding these devices, refer to the documentation listed in Table 4 "Supplemental Documentation".

Figure 3 The NCM-W: This diagram shows wiring between two NCM-W modules. Wiring from the last node connects to Port A of the first module, and wiring exits from Port B of the first module to the next node. Connections include Channel A, Channel B, and Earth Ground.

Note on external wiring: Wiring from the NCM-W installed outside the building cannot exceed 1000m (3280 ft.), must be in conduit, buried in a trench separate from power lines, and cannot cross power lines.

Switch Functions: Ground Fault Detection and Line Termination

The NCM-W provides two sets of switches to simplify network setup.

Figure 4 NCM-W Switches: This diagram shows DIP switches labeled SW100, SW101, SW102, and SW103, with their ON and OFF positions indicated. All switches are shown in the "off" position by default.

• Enable ground fault detection by setting switches "on": SW103 for Channel A, and SW101 for Channel B.
• Activate on-board end-of-line resistors by setting switches "on": SW100 for Channel A; SW102 for Channel B.

Note: Correct configuration depends on your network design; refer to the NOTI•FIRE•NET™ Manual (Network Version 4.0 and Higher).

2.2 Interconnecting the NCM-F

When connecting consecutive nodes/repeaters, fiber cable must exit one board on transmit (TX) and enter the next node/repeater on receive (RX). The fiber-optic pair (RX, TX) from port A of one Node/Repeater may be connected to either Port A or Port B of another node/repeater.

An NCM-F may be connected to any of the following devices:

• MIB-F
• MIB-WF
• NAM-232F
• Another NCM-F
• Network connection for NCS-F
• RPT-F
• RPT-WF

For information regarding these devices, refer to the NAM-232 and Repeater manuals listed in Table 4 "Supplemental Documentation".

Note: See the NOTI•FIRE•NET™ Manual (Network Version 4.0 and Higher) for maximum fiber-optic cable attenuation.

Figure 5 NCM-F Connection: This diagram illustrates fiber optic connections between NCM-F modules. Each module has Channel A and Channel B connections, with transmit (TX) and receive (RX) ports. The diagram shows how the TX port of one channel on a module connects to the RX port of the same channel on the next module.