Raychem TTDM Module

Product Information

Approvals and Certifications

The TTDM module is approved for operation in ordinary locations. The module must be located in an ordinary location, but can control intrinsically safe Raychem Tracetek detection cables placed in hazardous (explosive) locations.

• Tracetek detection cable in Class 1, Division 2, Groups A, B, C, D hazardous locations.
• Tracetek detection cable in Class 1, Division 1, Groups A, B, C, D hazardous locations (Zone 0 or 1 in Europe), if the cable is protected by an approved Zener barrier. Contact Chemelex for an appropriate Zener barrier.

UL based its module analysis on UL 864. As UL 864 is intended for the evaluation of fire alarm control units, only some requirements related to product use and design are applicable. The system was evaluated solely for inherent fire and electric shock hazards. Its actual purpose is to detect and locate liquid leaks; it is not intended to prevent critical process hazards from posing an electric shock or fire risk, or any other danger.

The module complies with IEC-801-2, 3, 4, 5. It meets the requirements of FCC, Part 15, Class B and EN55011-2 Class B.

Approvals shown: UL LISTED (76LJ), FM APPROVED, TUV GS PRODUCT SERVICE (certified for safety).

Supplementary Devices

A Zener barrier approved by an authorized body must be used when the detection cable connected to the TTDM is located in a Class 1, Division 1 hazardous location (or Zone 1). A Zener barrier can also be installed for lightning protection.

General Information

Read these instructions carefully and keep them in a safe place (preferably near the module) for future reference. Follow these instructions scrupulously to ensure proper module operation.

The TTDM leak detection and location module is designed specifically for Tracetek detection cables (TT1000, TT3000, and TT5000 detection cables, as well as TT100, TT300, and TT500 modular detection cables). The TTDM module can monitor up to 1500 m (4921 ft) of detection cable or 100 zones.

The TTDM module is designed for operation in ordinary locations at temperatures between 0°C and 50°C (32°F to 122°F). It is recommended to equip the TTDM with branch circuit protection (less than 20 A rating). A disconnect switch should also be provided and clearly marked; if a circuit breaker is used as a disconnect, it must comply with IEC 947-1 and IEC 947-2 standards. Observe national and local codes applicable to the installation.

Parts Required for Installation (Not Supplied)

• Wall brackets for surface mounting (four screws)
• Rubber or elastomer washers to seal the mounting points

Tools Required

• Hammer drill for electrical conduit entries
• Phillips head screwdriver
• Small flat head screwdriver

Storage

Store the module in a dry location before installation to prevent degradation of internal components.

TTDM Installation

Note: To avoid damaging the module, keep the TTDM in its carton until its mounting location has been prepared.

Choosing the Installation Location

Choose an indoor location where the module will be protected from weather and extreme temperatures.

⚠️ ATTENTION: Fire hazard. Do not install the TTDM module in an explosive atmosphere. The detection cable connected to the TTDM may be located in hazardous areas (depending on approval limits), but the module itself must be in an ordinary location.

Module Preparation Before Mounting

Important: The TTDM is an electronic module. During installation, take the following precautions to avoid damaging electronic components:

• Handle the module with care and avoid mechanical damage.
• Keep electronic components dry.
• When handling printed circuit boards, hold them by the edges to avoid physical contact with the electronic components.
• Avoid exposure to static electricity.
• Avoid contamination by metal filings, liquid ingress, or foreign objects.

Installation Steps:

• Remove the module from its packaging carton. Do not remove the protective membrane film on the front of the module.
• Open the enclosure door using a flat head screwdriver or a coin.
• Carefully disconnect the flat cable from the motherboard.
• To access the fourth motherboard mounting screw, remove the 4-20 mA card by lifting it off the motherboard (see Illustration 1) and place it in a safe location.
• Unscrew the four Phillips head screws holding the motherboard to the enclosure (see Illustration 1). Remove the motherboard and place it in a safe location.
• While protecting the user interface card on the enclosure door, drill the entries as planned (see Illustration 2).

Module Mounting

The module is mounted using four screws with pre-drilled holes as described in Illustration 3. If the mounting holes have plastic covers, remove them. To seal the mounting holes (essential for maintaining NEMA 12, IP54 rating), use a rubber or elastomer washer.

Module Re-assembly

Note: Before replacing the motherboard, ensure the inside of the enclosure is clean.

• Replace the motherboard and secure it with the Phillips head screws.
• Replace the 4-20 mA card, ensuring correct alignment of the connectors before permanently fixing the card. The markings on the card should be towards the top right.
• Reconnect the flat cable (carefully avoiding bending the pins during the operation).
• To seal the bottom of the enclosure, place a plastic plug (provided in the plastic bag with other parts) over the opening at the bottom of the enclosure.
• Close and lock the enclosure door.

Electrical Wiring and Relay Connections

Electrical Wiring

• Open the TTDM enclosure door.
• Pass the electrical cable through the fitting/adapter.
• Connect the ground/earth cable to the ground terminal. The ground terminal is indicated by the ⏚ symbol.

Note: Effective grounding is important to avoid electrical interference.

• Connect the phase and neutral conductors to the two-pin output block on the power supply card. Use the L2 terminal to connect the neutral, if applicable.

Note: The outputs accept 4.7 mm² (10 AWG) or smaller conductors. Raychem recommends 3 mm² (12 AWG) conductors with appropriate power branch circuit protection. The cable must be able to withstand a rated temperature of 65°C.

Voltage Warning: Do not exceed maximum allowable voltage.

Diagram showing power input terminals: L1, L2. Note indicating "Use for neutral, if present".

Alarm Relay Connections

The TTDM has three relays: service, leak, and fault. Each relay is equipped with two changeover (C) contacts; normally open (NO) and normally closed (NC) contacts are also provided. The relays are de-energized to indicate an alarm condition. The diagram below shows the state of the relays when each is in an alarm (de-energized) condition.

The following illustrations show how to wire the relays to allow remote monitoring of the TTDM status using a single pair of conductors. The TTDM de-energizes its relays to signal an alarm condition. Therefore, a loss of power, as well as any other alarm type, would trigger the remote alarm.

Note: The relay sockets accept 4.7 mm² (10 AWG) or smaller conductors. Raychem recommends 3 mm² (12 AWG) conductors. The cable must be able to withstand a rated temperature of 65°C.

Note: The maximum allowable load for the relays is 5 A.

Module Testing

Test After Power-Up

• Close and lock the enclosure door.
• Power up the module. Upon power-up, the green diode will light up, and the module will perform a self-diagnostic. When the startup procedure is complete, the module should emit a fault alarm signal (this is normal if no detection cable is connected).
• Press the red mute button to silence the audible alarm. Verify that the display matches the illustration below (showing time and date).

Display Example: Cable Cut

14:23 02-Jan-96

Follow instructions to change communication language.

If anything else occurs, check all connections. If the module still appears to malfunction, contact a Chemelex representative.

• Press the test button. The module performs a self-diagnostic.
• If the tests are successful, record this operation in the installation report.
• Power down the module.

Test Using TTDM Test Plug

• For a more thorough test, use the Tracetek TTDM-CTP test plug (packaged in a plastic bag with the TTDM). Insert the plug into the detection cable socket. Use the color code for correct alignment.
• Close and lock the enclosure door.
• Power up the module. Upon power-up, it will perform a self-diagnostic again. With the test plug inserted into the detection cable socket, the module should emit a leak alarm signal as soon as the startup sequence is complete. The red leak diode and the green control diode should light up, and the display should resemble the following (depending on configuration):

Display Example: Leak Detected

Leak 328 m

If ft: 1077 ± 20

Sim: 328 ± 6

If zones: 21

• If the test is successful, record this operation in the installation report.
• Power down the module.
• Remove the TTDM test plug and store it in a safe place for future use.
• If the detection cable is not immediately connected, close and lock the enclosure door.

Detection Cable Connection

Detection Cable Preparation

Ensure the detection cable has been installed and tested according to the accompanying instructions.

Connections

• Verify that the module is powered off.
• Open the enclosure door.
• Pass the Tracetek modular connection cable (or jumper cable) through the fitting/adapter.
• Connect the four color wires to the 5-pin detector interface plug.

Diagram: Sensor Cable Connection

Shows wire connections: RED, GRN, YEL, BLK, GND to terminals 33, 34, 35, 36, 35 respectively. Note: No connection to terminal 37.

Important: Observe colors. If wires are not connected to the corresponding terminals, the leak detection system will not function correctly.

• Insert the detection cable (SI) plug into the SI socket (point 20 on the first page diagram).

Zener Barrier Installation (If Applicable)

If the detection cable is to be installed in a Class 1, Division 1 location, approved organizations require the detection cable to be protected by a Zener barrier between the detection cable and the TTDM module. A galvanic or Zener barrier also helps protect the module against lightning if the detection cable is exposed to electrical discharges. Contact Chemelex to select an appropriate barrier. When installing a barrier, connect it according to the product's accompanying instructions.

Interface Connection

To connect the 4-20 mA port or the RS-232/RS-485 serial port, refer to the Tracetek TTDM User and Maintenance Manual.

System Startup and Test

System Startup

Once connections are complete, power up the module. It will perform a self-diagnostic and then display the system status. If the detection circuit is ready and free of leaks or other problems, only the green control diode will light up, and the display will show as follows:

Display Example: System Normal

System Normal

16:23 02-Jan-96

If this is not the case, consult the TTDM Operation and Maintenance Manual accompanying the module.

Commissioning

System commissioning is the responsibility of an authorized Tracetek representative. The installation plan is an important part of the Tracetek location system. The TTDM will indicate the location on the detection cable where a leak has been detected; the plan is essential for indicating the physical location.

Important: Keep the material and documentation accompanying the TTDM in a safe place for future use (commissioning, interface connection, operation, and maintenance).

Contact Information

France

Tel: 0800 90 60 45

Email: SalesFR@chemelex.com

Belgium / Belgique

Tel: +359 2 973 33 73

Email: SalesEE@chemelex.com

Switzerland / Suisse

Tel: +41 (41) 766 30 80

Fax: +41 (41) 766 30 81

Email: infoCH@chemelex.com