Installation Instructions

INTRODUCTION

The Model DAC-NET from Siemens Industry, Inc. functions as the CAN-BUS master for all CAN modules. A DAC-NET is required in each control panel and transponder, serving as the source for eight digital audio channels and transmitting audio data via ASI-BUS to all digital audio cards. It includes a BACnet (Building Automation & Control Network) interface for direct communication with the PMI/PMI-2/PMI-3 (CPC-DAC interface). The DAC-NET provides network communication (D-NET) between control panels and transponders (nodes), supporting both Class B and Class X wiring. Each DAC-NET occupies a unique D-NET address and contains onboard tones and audio messages. An optional Local Page Board (LPB) can be mounted piggyback, offering two inputs (for microphone and internal telephone system) and one output (for a monitor speaker). Refer to LPB Installation Instructions, P/N 315-035200 / A24205-A334-B836 for more details.

Features

The D-NET is supervised for open, short, and ground faults, with electrically isolated D-NET inputs/outputs. Wiring can be Class B or Class X using unshielded twisted pair. The maximum distance between DAC-NETs is 300m with Cat3 cable, 900m with Cat5 cable, or 700m with 1pr. 18B FPLR, 1pr. 16B FPLR, or 1pr. 14B FPLR cable. The network can support a total wiring length of up to 10 km with a maximum of 32 DAC-NET nodes. Up to 99 CAN sub-modules are addressable. The system supports eight independent audio channels, and software updates for the µC and D-NET controller, as well as tones and audio messages, are downloadable. Diagnostic LEDs for troubleshooting are located on the front panel of the DAC-NET.

Figure 1: DAC-NET Digital Audio Card – NETWORK. This image shows the front panel of the DAC-NET, featuring status indicators (LEDs) for POWER, CARD FAIL, CAN FAIL, ASI FAIL, CPC-DAC FAIL, ALARM, and EXT ALARM TRBL. It also displays controls including a RESET switch and D-NET address switches.

OPERATION

Class B

Each DAC-NET occupies a card slot in the CC-5/CC-2 card cage. The left connector of the CC-5/CC-2 handles signals for the CPC-DAC interface. The connection from the PMI/PMI-2/PMI-3 to the CC-5/CC-2 must be on the left side of the CC-5/CC-2.

D-NET: The D-NET Main In/Return Out and Main Out/Return In are isolated, allowing different power sources and ground references. The DAC-NET detects ground and data faults in each D-NET section. Each DAC-NET exchanges a data stream comprising digital audio and control data at a baud rate of 1.536 Mbps.

Note: Class B/Style 4 corresponds to ULC DCLB; Class X/Style 7 corresponds to ULC DCLC.

In Class B, the node with the lowest number (master) sends data from Main Out to Main In at the next node. The last node combines Main In with Return Out, returning the data stream. Upon return to the lowest numbered node, it combines Return In with Main Out and sends it to the next node's Main In.

Figure 2: DAC-NET D-NET Class B. This diagram illustrates the Class B network topology where nodes are connected sequentially. Data flows from Main Out to Main In, and the last node returns data via Return Out to Main In, creating a loop.

A Class B configuration requires two unshielded twisted pairs, which can be in a single cable.

Class X

In a Class X configuration, the master sends data via Main Out/Main In in a loop. The Return Out/Return In loop carries only a test data stream for supervision.

Figure 3: DAC-NET D-NET Class X. This diagram shows the Class X network topology, where the master sends data via Main Out/Main In in a loop. The Return Out/Return In loop carries only a test data stream for supervision.

A Class X configuration requires two unshielded twisted pairs between nodes, and the connection between Node 1 and Node 32 must be in a separate cable, not sharing a conduit with other cables.

Class X Fault Status

If a fault occurs in the Main loop, the node preceding the fault point combines Main In with Return Out. The node following the fault point combines Return In with Main Out. Both loops are combined, allowing the network to continue operating without a test data stream. D-NET automatically reconfigures after repair. A fault in the Return loop is detected and notified via the failure of the test data stream.

Figure 4: DAC-NET D-NET Class X Fault Status. This diagram depicts how faults in the Class X network are handled, showing loop reconfigurations and detection of test data stream failures.

Controls and Indicators

DAC-NET

The front panel of the DAC-NET features one reset switch and seven LEDs for the DAC-NET itself. It also includes one D-NET address switch and four LEDs for the D-NET. The optional LPB has its own reset switch and eight LEDs.

A reset switch is located on the top of the front panel; pressing it re-initializes DAC-NET operation.

The LEDs indicate status as follows:

• POWER (Green): Normally ON. Indicates power is applied to the DAC-NET. Blinking twice per second means the DAC-NET is not configured by ZEUS Tool. Blinking fast indicates a SW Update is in progress.
• CARD FAIL (Yellow): Normally OFF. Illuminates if the card microprocessor has failed.
• CAN FAIL (Yellow): Normally OFF. Illuminates if CAN communication has terminated. Blinking twice per second indicates no CAN module is connected.
• ASI FAIL (Yellow): Normally OFF. Illuminates if ASI communication has terminated.
• CPC-DAC FAIL (Yellow): Normally OFF. Illuminates if communication between PMI/PMI-2/PMI-3 and DAC-NET has terminated.
• ALARM (Red): Normally OFF. Illuminates if the DAC-NET has detected an active alarm.
• EXT ALARM TRBL (Yellow): Normally OFF. Illuminates if the DAC-NET detects a trouble on the External Alarm input (open or short circuit).

D-NET

• TRBL MAIN IN / RETURN OUT (Yellow): Normally OFF. Illuminates to indicate a trouble on Main In.
• GND FAULT (Yellow): Normally OFF. Illuminates to indicate a ground fault on field wires before the node.
• TRBL MAIN OUT / RETURN IN (Yellow): Normally OFF. Illuminates to indicate a trouble on Main Out. Blinking twice per second indicates a trouble on Return In (open circuit, short circuit, or data trouble).
• GND FAULT (Yellow): Normally OFF. Illuminates to indicate a ground fault on field wires after the node.

PRE-INSTALLATION

The following components must be set before inserting the card into the CC-5/CC-2:

• S4, Test Switch: These switches are used for programming and test functions. All switches must be set to the OFF position.
• S6, Network Address Switch: Set the three-digit D-NET address for the DAC-NET using the three-position switch near the bottom of the front panel. The address on the DAC-NET must match the address selected in the Zeus Programming Tool. Use the '+' button above each digit to increment and the '-' button below to decrement. The address range is 0-9 for the left digit and 1-32 for the two right digits (node addresses).

Figure 5: DAC-NET Switch Location. This diagram highlights the location of key switches on the DAC-NET: S2 (RESET SWITCH), S6 (NETWORK ADDRESS switch with '+' and '-' buttons), and S4 (Test Switch bank).

WIRING

WARNING: Remove electrical power before working on equipment.

All field wiring for the DAC-NET connects to the terminal blocks of the CC-5/CC-2 card cage slot where it is installed.

Note: In Canada, ULC S524 requires interconnecting data communication links for networks to be wired DCLC (Class X), except for dedicated network communication to annunciators.

To Connect External Wiring: Lift the white cover on the terminal block. Loosen the terminal screw counterclockwise, insert the wire, and tighten the screw clockwise.

The DAC-NET supports D-NET Class B (ULC DCLB) and Class X (ULC DCLC) wiring. Verify the ZEUS configuration for the correct network type.

Notes for Wiring:

• Power is limited.
• Use twisted pair wiring.
• Minimum wire gauge is 18 AWG (Ø 0.5mm); maximum is 12 AWG (2.5mm²).
• The two pairs between nodes can be in one cable.
• Maximum cable length between DAC-NETs: 300m (Cat3 cable), 900m (Cat5 cable), or 700m (1pr. 18B FPLR / 1pr. 16B FPLR / 1pr. 14B FPLR cable).
• The distance between the first and last DAC-NET must not exceed specified wire lengths.
• Maximum total distance around the ring is 10 km.
• Maximum 32 DAC-NETs are supported.
• Positive or negative ground fault is detected at <5kΩ for terminals 1-8.

Figure 6: DAC-NET Class B (ULC DCLB) D-NET Wiring. This diagram shows the terminal block connections for a Class B network, illustrating wiring for the first and last DAC-NET units in a chain, including notes on cable types and lengths.

Figure 7: DAC-NET Class X (ULC DCLC) D-NET Wiring. This diagram illustrates the terminal block connections for a Class X network, similar to Figure 6 but for Class X configurations.

Each connection between two nodes must be in separate cable routes. All CAN cards and modules connect via CAN Bus, requiring 120 Ohm termination resistors on both ends (CAN terminator at connectors, termination resistor at screw terminals). All digital audio cards and modules connect via ASI-Bus (LPB, AIC, ZAC-40, ZAM-180, XDMC), requiring four 120 Ohm termination resistors on both ends (ASI terminator at 60-pin connectors). The PMI/PMI-2/PMI-3 provides ASI termination at one end. The Analog Audio Bus carries audio signals; the LPB supervises microphone signal wiring, requiring an EOL resistor 3.3K, which is integrated into the LVM. If one LVM is mounted, jumper P7 must be set to position 1-2.

Figure 8: Anti-interference Capacitor. This diagram shows the connection of the 6.8µF / 100V bipolar anti-interference capacitor between Ground and Earth.

Figure 9: CAN BUS, ASI BUS, Analog Audio BUS Wiring – Single Control Panel with PMI/PMI-2/PMI-3. This complex diagram details the wiring connections for CAN BUS, ASI BUS, and Analog Audio BUS for a single control panel setup, showing interconnections between various Siemens modules like PMI, DAC-NET, OCM-16, SIM-16, and FCM.

Figure 10: Remote Control Panel with SIM-16 and OCM-16. This diagram illustrates the CAN BUS wiring for remote control panels using SIM-16 and OCM-16 modules, including notes on EMC protection.

Figure 11: Remote Control Panel with RNI. This diagram shows the wiring for a remote control panel when an RNI (Remote Network Interface) is used for EMC protection.

Figure 12: Remote Control Panel – Detail A. This diagram provides a detailed view of specific connections for a remote control panel, including speaker and microphone lines.

Figure 13: Multiple Remote Control Panels. This diagram illustrates the wiring configuration for multiple remote control panels.

Figure 14: Multiple Remote Control Panels – Detail A. This diagram offers a detailed view of connections for multiple remote control panels, similar to Figure 12 but for a multi-panel setup.

INSTALLATION

The DAC-NET plugs perpendicularly into one slot in the CC-5/CC-2 card cage via two 96-pin DIN connectors and can occupy any slot.

Figure 15: Installing the DAC-NET. This diagram visually guides the installation of the DAC-NET card into a CC-5/CC-2 card cage, showing the correct insertion method.

To install:

1. Insert the DAC-NET card into the card guides, right side up (lettering on the front panel legible).
2. Slide the card in until the edge connectors contact the receptacles on the motherboard.
3. Verify that the DIN connectors and card cage align properly. The card only plugs in one direction; do not force it if misaligned.
4. Place thumbs on the front panel near the captive screws and apply gentle, even pressure until connectors seat in the motherboard receptacles.
5. Secure with the captive screws.
6. Power up the system and confirm the DAC-NET power LED turns ON.

ACCESSORY PACK & ELECTRICAL RATINGS

Accessory Pack (shipped with DAC-NET)

Electrical Ratings