The CTM-530 Series
Interface Module
General Information
The Protectowire CTM-530 is a detection control module that is an interface between a main fire alarm
control panel detection circuit or addressable node and Protectowire Type CTI Linear Heat Detector. The
module provides one (1) supervised detection circuit that may be field wired for either Class A (Style D) or
Class B (Style B) service. The alarm initiating circuit is capable of operating a maximum of 4000 feet (1220
meters) combined total of Protectowire Type CTI Linear Heat Detectors and appropriate thermocouple
grade extension cable. Protectowire offers thermocouple grade extension cable as part numbers PWTX-200
and PWTX-500. The PWTX cable offered is for non-classified hazards only. The CTM-530 initiating circuit
is designed to monitor Protectowire Type CTI Linear Heat Detector only and does not support other types
of normally open contact alarm initiating devices.
Description
The CTM-530 operates using the Protectowire patented CTI Confi rmed Temperature Initiation technology.
When paired with Protectowire Type CTI Linear Heat Detectors, the module can distinguish between a me-
chanical short in the linear heat detector and thermal alarm activation, which greatly reduces the risk of false
alarms resulting from physical damage to the detector. This multi-criteria detection method provides for
short circuit discrimination, a feature previously unavailable for conventional digital type linear heat
detectors.
The CTM-530 is designed for easy installation and is available in an optional NEMA-4X rated enclosure for
mounting outside of the host fi re alarm control panel or remotely near the hazard to be protected. In order
to ensure proper operation, each CTM-530 module requires regulated resettable external power which is
normal-ly provided by the host fi re alarm panel. Each module contains a green “Power-On” LED indicator,
one (1) red “Alarm” LED indicator, one (1) yellow “Fault” LED indicator and one (1) yellow “Short”
indicator. On (1) set of Form C alarm contacts, one (1) set of Form C general fault contacts and one(1) set of
Form C short circuit fault contacts are provided to connect the unit to the host fi re alarm panel. The module
also provides tow 4-20mA outputs one which allows monitoring of the module status and the other for alarm
point location
information.
In addition to the features listed above the standard version of the module, model CTM-530, provides a 4x20
LED back-lit LCD display and navigation buttons for access to a complete menu driven user interface. Also
available is model CTM-530LT which is intended for use in low temperature applications. The LT version of
the interface module contains no LCD display or navigation buttons and no menu accessible user interface
and therefor requires the use of the optional CTMP-1 Programmer for system commissioning, setting alarm
temperatures and accessing history data.
Page 4
RX
TX
PC--1239
JP2
K1
K2
K3
CTM-530
LINEAR
HEAT
DETECTOR
POWER
ALARM
FAULT
SHORT
APPROVED
FM
OKESC
JP2
PROTECTOWIRE CTI-155
NORMAL
12:45 PM 4/16/2020
RX
TX
PC--1239
JP2
K1
K2
K3
CTM-530
LINEAR
HEAT
DETECTOR
POWER
ALARM
FAULT
SHORT
APPROVED
FM
OKESC
JP2
PROTECTOWIRE CTI-155
NORMAL
12:45 PM 4/16/2020
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