Micro-Mark Digitrax DS52 Stationary Decoder User Manual

1. Introduction

The Digitrax DS52 is a dual stationary decoder designed for controlling two bi-polar snap switches or slow-motion turnout machines in a Digital Command Control (DCC) model railroad layout. This device allows for digital control of turnouts, integrating them seamlessly into your DCC system for enhanced operational flexibility.

The DS52 is compact and provides reliable performance for automating your model railway turnouts.

2. Setup and Installation

2.1 Safety Precautions

• Always disconnect power from your DCC system before making any wiring connections.
• Ensure all wiring is correctly insulated to prevent short circuits.
• Do not exceed the specified voltage or current ratings for the DS52 or your turnout motors.
• Keep the decoder away from moisture and excessive heat.

2.2 Wiring the DS52

The DS52 has terminals for power, DCC signal, and two turnout motor connections. Refer to the labels on the decoder for correct terminal identification.

2.2.1 Power Connection

• Connect the DS52 to your DCC track power bus or a separate regulated 12-16V AC/DC accessory power supply.
• Ensure correct polarity if using a DC supply.

2.2.2 DCC Signal Connection

• Connect the two DCC input terminals of the DS52 to your DCC track bus (rails). This provides the digital control signal.

2.2.3 Turnout Motor Connection

The DS52 supports two types of turnout motors:

• Bi-polar Snap Switches (Solenoid Type): Connect the common wire of the snap switch to the common terminal (e.g., 'C' or 'GND') on the DS52. Connect the two throw wires (for straight and diverging) to the respective output terminals for Turnout 1 (e.g., '1A', '1B') and Turnout 2 (e.g., '2A', '2B').
• Slow-Motion Machines (Stall Motor Type): Connect the two motor wires directly to the output terminals for Turnout 1 (e.g., '1A', '1B') and Turnout 2 (e.g., '2A', '2B'). The DS52 provides continuous power to hold the motor in position.

2.3 Mounting

• Mount the DS52 in a dry, dust-free location, preferably under the layout, where it is protected from physical damage and easily accessible for wiring and inspection.
• Ensure adequate ventilation around the unit.

3. Operation

3.1 Programming the DS52 Address

The DS52 uses Configuration Variables (CVs) to set its accessory addresses. The DS52 controls two turnouts, with the second turnout automatically assigned the next sequential address after the first.

1. Place your DCC system into accessory programming mode. Refer to your DCC system's manual for specific instructions on programming accessory decoders.
2. Send the desired accessory address for the first turnout to the DS52 using your DCC throttle. For example, if you want the first turnout to be address 10, send address 10.
3. The DS52 will store this address. The second turnout will automatically be assigned address 11.
4. Exit programming mode on your DCC system.

Note: Some DCC systems may have a dedicated programming track or method for stationary decoders. Consult your DCC system's documentation.

3.2 Controlling Turnouts

Once programmed, you can control the turnouts connected to the DS52 using your DCC throttle.

• Select the accessory address corresponding to the turnout you wish to control (e.g., address 10 for the first turnout, address 11 for the second).
• Use the 'Throw' or 'Close' (or equivalent) function on your DCC throttle to change the turnout position.
• Observe the turnout movement to confirm correct operation.

4. Maintenance

The Digitrax DS52 is designed for reliable, long-term operation with minimal maintenance. Adhering to the following guidelines will help ensure its longevity:

• Keep Connections Secure: Periodically check all wiring connections to ensure they are tight and free from corrosion. Loose connections can lead to intermittent operation or damage.
• Environment: Ensure the decoder is kept in a dry, dust-free environment. Avoid locations with extreme temperature fluctuations or high humidity.
• Ventilation: While the DS52 generates minimal heat, ensure it is not enclosed in a way that prevents air circulation, especially if multiple decoders are mounted closely together.
• Inspection: Occasionally inspect the decoder for any visible signs of damage, such as burnt components or frayed wires.

5. Troubleshooting

5.1 Decoder Not Responding

• Check Power: Verify that the DS52 is receiving adequate power from your DCC track bus or accessory power supply. Use a multimeter if necessary.
• Check DCC Signal: Ensure the DCC input wires are correctly connected to the DCC track bus and that the DCC system is powered on and transmitting a signal.
• Verify Address: Confirm that the correct accessory address has been programmed into the DS52 and that you are using this address on your DCC throttle.
• Short Circuit: A short circuit on the turnout motor outputs can sometimes prevent the decoder from operating. Disconnect turnout motors and re-test.

5.2 Turnout Not Moving Correctly

• Wiring to Turnout: Double-check the wiring between the DS52 and the turnout motor. Ensure all connections are secure and correctly assigned to the 'straight' and 'diverging' positions.
• Motor Type Compatibility: Confirm that your turnout motor is compatible with the DS52 (bi-polar snap switch or slow-motion machine).
• Mechanical Issues: Inspect the turnout mechanism itself for any binding, obstructions, or damage that might prevent smooth movement.
• Power Supply: If using a separate accessory power supply, ensure it can provide sufficient current for the turnout motors, especially for snap switches which draw higher momentary current.

5.3 Short Circuit Indication

• If your DCC system indicates a short circuit when the DS52 is connected, immediately disconnect power.
• Inspect all wiring for bare wires touching each other or the track.
• Check the turnout motors for internal shorts or damage. Disconnect them one by one to isolate the fault.

6. Specifications

7. Warranty and Support

For detailed warranty information, technical support, or service inquiries regarding your Digitrax DS52 Stationary Decoder, please refer to the official Micro-Mark or Digitrax website. You may also contact their customer service directly through the contact information provided on their respective websites. This manual does not contain specific warranty details or direct support contacts.