Alexor (PC9155) overview | AlarmSystemHelp.com

On this page

Overview
Error Codes
Troubleshooting
Compatible Peripherals
Installation Notes
FAQs

Overview

Alexor PC9155 is a wireless intrusion panel built around compact deployments and fast enrollment workflows.

Official source

Product page: DSC Alexor PC9155 (ID 53)
Manual basis: *Alexor Installation Guide v1.1* and *Alexor User Manual v1.1*

Capacity and I/O profile

Wireless zones: 1 to 32
Auxiliary output current: 200 mA
On-board I/O points can be used either as:
Zone 33 and Zone 34 inputs, or
Low-current PGM outputs (50 mA)

Enrollment behavior

Wireless enrollment section: [804]
First keypad enrollment window is approximately 2 minutes after initial power-up

Signaling options

Optional communicator modules include TL265, TL265GS, GS2065, and GS2060 family IP/cellular modules.
For SIA CP-01 installations, minimum equipment is PC9155-433 control panel plus WT5500-433 keypad.
Optional: WT5500P-433 (prox reader), PT4 prox tags, WT4989 keys, WT4901/WT4911 sirens.

Related troubleshooting guides

Alarm communication failure (FC, Comm Fail, trouble 4): causes and fixes Why an alarm panel reports a communication failure, from cancelled landlines and VoIP to retired 3G cellular radios, and what to ask your monitoring company.
Alarm keeps going off for no reason? Common causes of false alarms The real reasons alarms go off on their own: misaligned door contacts, motion detectors and pets, heat and drafts, low batteries, and entry delays, and how to track down the zone responsible.
How to put your alarm system on test before working on it Avoid false dispatches and fees: how to put a monitored alarm on test with the central station, what to tell them, and how to confirm signals afterwards.
How to replace the backup battery in an alarm control panel Step-by-step: finding the right 12-volt sealed lead-acid battery, swapping it safely without setting off the siren, and how long the low-battery warning takes to clear.
Moved into a house with an existing alarm system? What to do first How to identify the panel, get the codes, find out whether it is locked to the previous owner's alarm company, and decide whether to reactivate, self-monitor, or replace it.

Error Codes

Common trouble patterns

Symptom	Likely cause	Action
Keypad does not enroll	Enrollment window expired	Power cycle and re-attempt within first 2 minutes
Missing wireless zones	Device not enrolled or out of range	Re-enroll in [804], verify placement and battery
PGM not switching	I/O configured as zone instead of PGM	Confirm I/O mode and output mapping
AUX overload symptoms	Exceeded 200 mA auxiliary load	Reduce load or add external power strategy

Fast recovery checklist

Check power and battery state.
Confirm keypad enrollment status.
Validate zone definitions for 1-32 plus I/O mode.
Re-test communication path after trouble clear.

Code / display	Meaning	What to do
Symptom	Likely cause	Action
Keypad does not enroll	Enrollment window expired	Power cycle and re-attempt within first 2 minutes
Missing wireless zones	Device not enrolled or out of range	Re-enroll in [804], verify placement and battery
PGM not switching	I/O configured as zone instead of PGM	Confirm I/O mode and output mapping
AUX overload symptoms	Exceeded 200 mA auxiliary load	Reduce load or add external power strategy

Troubleshooting

Enrollment-first approach

Start with keypad enrollment immediately after panel power-up.
If first keypad is missed, restart power and repeat within the initial 2-minute window.
Use [804] for wireless enrollment verification and cleanup.

Zone and I/O conflicts

Confirm whether onboard I/O is defined as zones 33/34 or as PGMs.
Resolve duplicate mappings before zone walk tests.
Test alarm and restore transitions for every enrolled point.

Power budget checks

Keep AUX draw within 200 mA.
For external devices, avoid sourcing power from panel AUX if startup current is unknown.

SIA deployment guardrail

For SIA-oriented deployments, verify minimum equipment set is PC9155-433 with WT5500-433 before dispatch.

Compatible Peripherals

Wireless enrollment ([804]) — typical devices

Device type	Examples	Notes
Keypad	WT5500-433	First keypad within 2-minute power-up window
Prox keypad	WT5500P-433	Prox reader keypad variant
Siren	WT4901 indoor, WT4911 outdoor	Enroll after keypad
Sensors	WT4xxx contacts, PIR, glass-break	One wireless ID per zone 01–32
Keys	WT4989 wireless keys	Panic/disarm functions per programming
Prox tags	PT4	Enroll to user slots on prox keypad

Optional communicators

Module	Path
TL265 / TL265GS	IP/cellular reporting
GS2060 / GS2065	Cellular/IP family modules

SIA CP-01 minimum equipment

PC9155-433 control panel + WT5500-433 keypad — verify before CP-01 labeled installs.

Not compatible

PowerSeries Keybus PK5500 keypads
Neo Corbus HS2 keypads
PowerG-only wireless without 433 MHz Alexor path
PC5108 / RF5132 PowerSeries modules on Alexor panel

Installation Notes

Suggested install sequence

Bench power panel and enroll first keypad during the 2-minute startup window.
Enter [804] and enroll all wireless zones.
Decide I/O role (zones 33/34 or PGM outputs) and program accordingly.
Validate communicator path when TL265 or GS2065 is installed.
Complete full walk test and reporting test before final mounting.

Wireless enrollment sequence ([804])

Enroll in this order: keypad → sirens → sensors → pendants → wireless keys.

Power panel — AC Power and Ready LEDs flash for ~2 minutes for first keypad enrollment.
Press any button on the first WT5500 within that window.
For additional devices, use installer [804] — enter ESN from device sticker (6-character alphanumeric).
Assign zone 01–32 (one device per zone); accept recommended zone type or scroll options.
Panel enters individual placement test after each sensor enrollment — verify RF before [#] to next device.
Run global placement test after all devices are enrolled.

I/O programming ([013] options 1–2)

Terminal	Zone mode	PGM mode
I/O-1	Zone 33 input	PGM output 50 mA
I/O-2	Zone 34 input	PGM output 50 mA

Cannot use the same point as both zone and PGM simultaneously.

Open the manufacturer manual

FAQs

How many zones does Alexor support?

Alexor supports wireless zones 1 through 32, plus optional use of I/O points as zones 33 and 34.

Can I use the onboard I/O as outputs?

Yes. The same points can be configured as low-current PGMs at 50 mA each — not simultaneously as zones.

Why did my keypad fail to enroll?

The first keypad must usually be enrolled within about 2 minutes after power-up. If missed, power cycle and repeat.

What order should I enroll wireless devices?

Keypad first (power-up window), then [804]: siren → sensors → pendants → keys.

Which communicator modules are typical?

TL265, TL265GS, GS2060, and GS2065 are optional signaling modules.

What is the AUX current limit?

200 mA total auxiliary — budget sirens, communicators, and external devices accordingly.

Can I add hardwired zones?

Only via onboard I/O as zones 33/34 — not a full hardwired expander like PowerSeries PC5108.

Where is the official source page?

DSC Alexor PC9155 (ID 53)