4
PALS Installation Manual
Crisis Controller©™ Monitoring Center
Equipment
How Transmitters Communicate with Receivers
Serial Receiver
INSTALLATION MANUAL OVERVIEW
The Crisis Controller©™ Alert Monitoring Center receives and supervises alarm information from wireless security
devices and transmitters. Data from these devices is processed by the software and displayed to rapid response
to alarms and trouble conditions.
The PALS©® Alert Monitoring Center consists of a central monitoring computer, which receives data from
wireless 900MHz transmitters through a serial receiver. Numerous types of transmitters are available, including
fixed-position contact sensors, motion and smoke detectors, and personal alarm transmitters. The software can
also process signals from Actall Security Product’s® Personal Alarm Locating System (PALS©®), which transmits
location data from fixed position infrared (IR) Locators to The transmitters then communicate their location to the
Monitoring Station, allowing Control Operators to track and locate positions of the individuals wearing the mobile
alarm devices.
Wireless transmitters send coded digital messages to the serial receiver(s). These messages contain data identifying
the transmitter and its status. Multiple transmissions of this data over the 902 to 928 MHz frequency range help
prevent signal interference and ensure that the signal is received.
Serial Receiver(s) identify valid messages, decodes them, and transmits that data to the
Crisis Controller©™ software for alarm annunciation on the Alarm Monitoring PC.
Most sites require the use of wireless repeaters: 900MHz transceivers (powered by 14VAC)
that identify valid transmissions and re-transmit them at full signal strength. Repeaters
provide a method of extending effective transmission ranges and of providing multiple,
redundant transmission paths between transmitters and receivers.
Serial Receiver
The Personal Mobile Transmitters (PMTs) used with the PALS©® systems work in conjunction with IRT Locators to
provide detailed information of location and movement. PMTs store the two most recently received IRT Locator
codes. When an alarm is sent, this data is sent along with the alarm status to a serial receiver attached to the
Monitoring Center PC. If a PMT remains within the coverage area of the same Locator for a longer period of time,
the programmer can increase the time interval between PMT readings. This reduces current consumption and
increases battery life. Among the features of the PMT is the capability to monitor movement from locator to locator.
A Guard Tour feature permits the system to monitor the time between arrivals at locations on a predetermined
route, so that significant variations from the route and times of transit can create alarms. Actall offers two PMT
versions: the PALS 9000 and the L2L.
