Overview
Sur-Gard SYSTEM III/IV POTS, dual-POTS, and network line cards expand central-station receiver capacity.
Product type
Module / accessory
At a glance
| Detail | Value |
|---|---|
| Category | Module / accessory |
| Primary manual | Sur-Gard Line Card Installation Manual |
| Install scope | Central station / infrastructure |
| Supervision | Central-station receiver |
What this device does in the system
Extends panel capacity (zones, outputs, wireless, power, or reporting) — plan bus address, current draw, and device limits before install.
Before you install or replace one
- Confirm exact model number on the label matches the install manual.
- Verify host panel or system family — Keybus, Corbus, Combus, PowerG, MX, or 433 MHz are not interchangeable.
- Check device limits on the panel/receiver before adding zones, sirens, or credentials.
- Include current draw in power budget calculations for modules, receivers, and keypads.
- For wireless: test RF at the mounted location, not only on the bench.
Official sources
- Product page: DSC Dual POTS Line Card for SYSTEM IV (ID 1445)
- Sur-Gard Line Card Installation Manual — DSC official documentation
FAQs
Which panels or systems does Dual POTS Line Card for SYSTEM IV work with?
See compatible-peripherals.md for the host compatibility table. Match bus type and wireless generation before ordering.
Why does the panel show a fault after install?
Usually enrollment, wiring, power, or tamper — read the active trouble on the panel ([*, 2] where supported) before replacing hardware.
Can I use this on a different brand panel?
Only if the install manual explicitly lists cross-brand compatibility — most DSC devices are family-specific.
Where is the official documentation?
DSC Dual POTS Line Card for SYSTEM IV (ID 1445) — Sur-Gard Line Card Installation Manual
How do I test after installation?
Complete walk test, supervision test, and (for wireless) placement test at the final mounted location — bench tests miss range issues.
How many modules can I add?
Limited by panel device count, bus current, and expander slots — sum AUX draw before adding hardware.
Can I mix expander revisions?
Often no — e.g. PC5108 v1 and v2 must not mix on PowerSeries; verify manual revision table.