User guide

MR-2100/2200 Programming Manual
5
The MRI-M500S control module can be used to control a supervised output, such as a bell or
strobe circuit. The control module monitors the circuit wiring and troubles will be reported. The
module will require a separate 24 VDC supply for the controlled circuit. When programming the
database in MHI, be sure to program the control module correctly. Choose any “Control (str)” other
than “Control (relay)” for the MRI-M500S module. The MR-2400 will not operate a control module
if the supervised circuit is shorted. Also there are options in MHI that affect the MRI-M500S control
module but not the MRI-M500R relay module.
The MRI-M500R relay provides two Form C relays. Choose “Control (relay)” for the MRI-M500R
module. There are options in MHI that affect the MRI-M500R relay module that do not affect the
MRI-M500S control module.
The MRI-M500X isolator module is used to prevent wiring faults from affecting the entire circuit. It
divides the addressable circuit into sections. The isolator has separate IN and OUT wiring. A short
on one side of the isolator is not seen on or affects the other side. Isolator modules do not use
addresses. The isolator relies on a voltage threshold to determine whether it should be isolating or
not. This voltage threshold is around 6.5V. All isolators in a system are in isolated mode on system
power up. If there is an excess of current draw, the isolator will not close. When the short is
removed, the isolator module automatically closes the circuit again. The LED on the isolator
module turns on when the module is in isolated mode, otherwise it flashes periodically. System
Sensor recommends no more than 25 devices between isolator modules since the inrush current
of the devices may mimic a short condition preventing the isolator from closing.
The sensors all use bases for mounting. Besides the standard plain bases, there are also relay
bases, isolator bases and a sounder base. The available bases are:
Sensors
MRI-1251 Ionization type smoke detector, low profile
MRI-1551 Ionization type smoke detector
MRI-2251 Photoelectric type smoke detector, low profile
MRI-2551 Photoelectric type smoke detector
MRI-2251T Photoelectric type smoke detector c/w heat detector,
low profile
MRI-2551TH Photoelectric type smoke detector c/w heat detector
MRI-2251TMB Acclimate Photo-Thermal Detector
MRI-5251 Fixed temperature detector, low profile
MRI-5251H Fixed high temperature detector
MRI-5551 Fixed temperature detector
MRI-5251R Rate of Rise and fixed temperature detector, low profile
MRI-5551R Rate of Rise and fixed temperature detector
MRI-7251 Pinnacle Laser
MRI-B501 Flangeless base for all sensors
MRI-B501B Flanged base for MRI-x551 sensors
MRI-B210LP Flanged base for MRI-x251 sensors, low profile
MRI-B501BH Sounder base for all sensors