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Introduction
TAM-242/252/262 Installation and Operating Manual
Quality of Service
The TAM-242 has been designed so that the battery connection time randomises the start of position
reporting. This maintains a high quality of service by avoiding network congestion which could occur
with synchronised reporting across a population. Position reports for each TAM-242 will still arrive at
the programmed reporting interval.
Limitations on Intended Operating Environment
Guidance notes for the installation and use of the TAM-242 must be strictly followed. EMS Global
Tracking exercises due diligence to ensure that the equipment is suitable for use, but ultimate
responsibility for the compliance of a complete system rests with the installer and operator.
What is the TAM-252?
The TAM-252 is a TAM-242 supplied with a magnetic proximity switch and actuator which can be
used to monitor a moving object, such as a door.
TAM-252 Proximity switch and actuator
The proximity switch is mounted on the end of a cable that mates with the front panel connector on
the TAM-242 unit. The actuator is a separate item that must be mounted so that in normal operation
it is located next to the proximity switch.
Figure 2-2: TAM-252 Proximity switch and actuator
Proximity switch status reporting
When supplied as part of a TAM-252 kit, the TAM-242 unit will report the status of the proximity
switch (OPEN or CLOSED). The switch is CLOSED when the actuator is mounted correctly next to
the switch. The switch is OPEN when the actuator is not close enough to the switch, when the switch
cable is not mated to the TAM-242 unit or when the switch cable is cut. When the switch status
changes from CLOSED to OPEN, an extra position report is generated and an 'Alert' flag is set in the
message. The TAM-242 will then generate further Alert messages for the next 4 hours at the defined
Alert reporting interval. After 4 hours the unit will revert back to standard tracking messages at the
normal reporting interval.
This document contains information that is proprietary and confidential to EMS Global Tracking (one or more of the following: EMS Global Tracking Ltd a nd EMS Technologies
Canada, Ltd), and is supplied on the express condition that it is not to be used for any purpose other than the purpose for which it was issued, nor is it to be copied or
communicated in whole or in part, to any third party other than the recipient organization, without the prior written permission of EMS Global Tracking.
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© 2011 EMS Global Tracking Ltd, EMS Technologies Canada Ltd.
MAN-0059 Issue 4
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