How to Install a SEM 300 System Enhancement Module for DSC PowerSeries Dual-Path System Enhancement Module (SEM) is the most cost-effective and comprehensive solution to migrate compatible DSC PowerSerie PC1616, PC1832, and PC 1864 panels to The Dual-Path SEM supports the 4G LTE cellular network and optional Broadband Ethernet. This ensures the longest life cycle with the most secure and reliable service.



  • System Enhancement Module
  • Wire
  • Wall Anchor screws
  • Installation Guide

Panel compatibility

The SEM-DSC PowerSeries is only compatible with the following panels that are version 4.20+:

  • PC1616
  • PC1832
  • PC1864

Recommended tools and supplies

Note: These are not included.

  • Screwdrivers: Small blade and Phillips
  • Drill and bits for screws and/or wall anchors
  • Ethernet cable
  • Alpha keypad (Version 1.2+)
    • strongly recommends installing an alpha keypad to ensure the failure to communicate (FTC) trouble condition is displayed.
  • Four-conductor, 22 AWG or larger stranded wire

The following table shows the maximum wire length for each gauge.

Gauge Maximum wire length
22 gauge 40 feet (12.2 m)
18 gauge 90 feet (27.4 m)

Prepare the system

Before powering down the system:

Verify panel compatibility

Verify that the panel is compatible by checking the version and year printed on the PROM chip inside the panel enclosure.


Inspect for peripheral devices
  1. Take inventory of all peripheral devices (wireless receivers, zone expanders, keypads, power supplies, etc.) wired to the system.
  2. Inspect peripheral device wiring to verify there are no loose ends or intermittent connections between the device and system.

Note: The presence of peripheral device issues can often cause the SEM installation process to take longer than expected.

  1. Verify all peripheral devices are supervised by the panel. To verify peripheral devices are supervised by the panel:
    A. Press [*][8].
    B. Enter the installer code.
    C. Press [903].
  2. Reset supervision if necessary. To reset supervision:
    A. Press [*][8].
    B. Enter the installer code.
    C. Press [902].

Disarm and power down the panel

  1. Verify the panel is disarmed and clear of any alarms, troubles, or system faults.
  2. If you do not know the current installer code, check the installer code at the panel before powering down the panel.
  3. Then remove AC power and disconnect the backup battery to completely power down the system.

After powering down the system:

Remove third party communication

If there are any third-party communicators installed or a POTS line connected to the panel, remove them.

The SEM is not compatible with POTS, IP/GSM devices, or other third-party communicators. Therefore, the SEM should be the only communication device installed for alarm signaling to the monitoring station.

Connect the SEM


Before mounting the SEM to the wall:

  1. Evaluate how the wiring cables will be routed from the SEM to the panel.
  2. Remove the snap-off plastics. There are two routing options available: the side of the enclosure for side routing or the rear of the enclosure for wall routing.
  3. Verify the wiring of the primary antenna, diversity antenna, and ethernet dongle are routed correctly.
    NOTE: The Cat-M variant (indicated by the ME910 Telit radio) only requires the primary antenna.

When ready to mount:

  1. Press in on the thumb tabs located at the bottom of the enclosure, then swing up the top half of the enclosure cover to expose the internal components.
  2. Place the SEM enclosure backplate against the wall at the desired mounting location and mark the four mounting holes.
  3. Using the provided mounting screws and wall anchors (if needed), place the first mounting screw through the top-right enclosure hole. This screw will be used to hang the SEM from the wall while mounting and should not be tightened until the last step.
  4. Place the second mounting screw through the bottom-left mounting hole. This screw is used to level the enclosure on the wall and should not be tightened until the last step. A standard leveling device may be used to ensure the unit is level.
  5. Place the third mounting screw through the top-left enclosure hole. This screw should be tightened fully against the unit and wall before moving to the next step.
  6. Place the final mounting screw through the bottom-right enclosure hole. This screw should be tightened fully against the unit and wall before moving to the next step.

Important : This screw is critical for the wall tamper functionality and should not be overlooked.

  1. Tighten the first two mounting screws fully to the unit and wall to complete the mounting process.


To wire the panel:

  1. Connect the yellow/green data cables and red/black power supply cables to the designated locations at the SEM and panel.

  2. Connect an Ethernet cable to the pre-installed Ethernet jack to utilize dual-path communication.

  3. Remove the snap-off plastics from the enclosure side at the desired locations, then route the cables around the internal strain relief walls and out the side of the enclosure.

  4. Before completing the mounting, verify the wiring connections are secure and all internal components are in their proper location.

  5. Then close the enclosure by sliding the cover into the mounting points at the top of the enclosure base and then swinging down the cover to snap the thumb tabs into place.

Zone scan

Connect the backup battery and restore AC power to the panel. For the SEM to interact with the existing zones on the system, it must read them from the PowerSeries panel. The SEM does a zone scan to read this information.

The zone scan automatically begins within one minute after the panel is powered up and should take between 5 and 15 minutes, depending on the number of partitions and zones on the system. Do not touch the panel, keypad, or SEM at this time.

The zone scan is complete when the green and yellow lights on the keypad remain solid. If you press any buttons on the keypad during the zone scan, the message System unavailable displays on the screen. The date and time shows on the screen when the zone scan is complete.

Important: If the system was previously communicating over a phone line, we recommend Disabling Telco Line Monitoring (Section 015, Option 7) and Removing the Phone Numbers (Section 301-303).

Broadcast sensor names

For the SEM to be able to read the sensor names stored on the panel and display them on, you must broadcast the sensor names stored on the keypads. This should be done for every install with an LCD keypad and is necessary even if there is only one keypad on the system.

Confirm communication

Before completing the installation, verify that the SEM is fully in sync with the panel and communicating with by verifying:

  1. The correct devices are present on the account equipment list in
    2 You can view all user codes in the app or Website, and the correct users are reported when arming or disarming at the panel.
  2. All alarms are reported correctly to and the monitoring station.

Additional information

Installation settings

For the SEM to communicate with the panel and report all alarms, certain panel settings must be set at the panel. These settings are automatically changed during installation, so no further action is required by the installer.

Edit master code

Section 015, option 6 is disabled. This setting is required for SEM to change the master code via the User Programming *5 menu.

Arm/Disarm with Trouble

Section 021, option 8 is disabled. This setting is required for SEM to arm the panel when a trouble is active. This setting is available on select DSC panel versions.

Swinger Shutdown

Section 1xy, option 6 is enabled or disabled based on the default zone attributes (i.e., section 101, option 6 is enabled for zones programmed as group 01 Delay 1, but disabled for zones programmed as group 08 24 HR Fire). This setting is required for SEM to support the swinger shutdown feature.

Transmission Delay

Section 1xy, option 7 is disabled. This setting is required for SEM to report zone alarms immediately.

Report codes

Sections 320-349 do not determine or impact event reporting on

Important: All monitoring station forwarding settings should be set up via Monitoring Settings.

Gateway LED reference

The enclosure gateway LEDs can be used to indicate communication errors, panel communication, network communication, and signal strength.

Trouble LED Trouble_LED

The Trouble LED flashes 1 to 8 times in a four-second interval to indicate specific error conditions.

Flash pattern Description
1 The module cannot communicate with the panel. Perform a power cycle on the panel.
2 then 4 The module provisioning process could not be completed. Power cycle the system.
2 then 5 The module provisioning process could not be completed because the module is currently roaming off the carrier’s primary network.
3 The module is trying to register on the cellular network. If it persists for more than a few minutes, the module is having problems registering. Check L4 for signal level. If signal level is lower than 2 bars, change the panel’s location or use a remote antenna option.
4 The module is registered on the cellular network but could not connect with
5 The radio on the module is not working correctly. If this persists for more than a few minutes, the module may need to be replaced. This error is extremely rare, so please verify that the module is flashing 5 times.
6 This indicates an error only if it persists for more than a minute. Otherwise, it’s an indication that the module is resolving an unusual condition regarding communication with the cellular network.
7 The SEM is unable to access panel programming. Check the panel wiring and installer code.
8 If this error persists, the account may have been set up incorrectly. Check that the serial number being used matches the serial number used to create the account. If the serial numbers are the same,

Path LED Path_LED

The Path LED flashes to indicate the active communication path (cellular, broadband, or both) to

Flash pattern Description
Steady long flash (~2 sec) The cellular communication path is active.
Long flash (~2 sec) followed by a short flash (~0.5 sec) Both cellular and broadband communication paths are active.
Steady short flash (~0.5 sec) The broadband communication path is active. This should also accompany an error LED flash.
No flash Both communication paths are not communicating. This should also accompany an error LED flash.

Signal LED Signal_LEDThe Signal LED flashes to indicate the cellular signal strength (0 to 6 bars).

Panel LED Panel_LED The Panel LED flashes with every communication to the panel.

Power LED Power_LEDThe Power LED illuminates solid when power is supplied.