H-300 Central Monitoring System

The main purpose of H-300 Central Monitoring System (CMS) is to monitor self-contained emergency lighting luminaires. In an extended version (H-300 DYN) the system additionally controls dynamic emergency lighting luminaires. The basic system consists of H-312 main control and monitoring unit, functionally identical H-310 (IP65) and H-311 (DIN rail mounted) network expanders and luminaires of type CTB, CTL or older of CT typeT. The H-312 unit is equipped with four communication lines operating concurrently that may be software configured either for the CT-BUS (CTB) or CT-LOOP (CTL) network topology.
A compatibility mode for old CT type luminaires and H-302 R distributors is also present.

All H-300 system components are addressable and have a unique factory configured and non-changeable hardware address. Beside the hardware address each networked device has a linear logical address (1 - 65535) and a physical address representing the physical route from the main unit to the device. Logical and physical addresses may be set during device installation or during system commissioning on the H-312 unit. Through the usage of a unique hardware address duplicate logical and physical addresses are detected automatically (only CTB and CTL).

The H-312 is equipped with a classic capacitive 7" touch screen user interface and a built-in web server with secure hypertext transfer protocol. Both allow for data management and visualization of devices (luminaires, expanders, etc.) on the building plan.

Equipped with H-314 or H-315 potential-free input modules the H-300 system may control individual luminaire groups to achieve night or stand-by lighting. It is also possible to adjust luminaire brightness in maintained mode (available only for CTB and CTL type luminaires). Schedule based control is also possible.

System characteristics

7" LCD display with capacitive touch screen
Dual Core microprocessor with two operating systems: Linux on first core, Real-Time operating system on second core (H-300 DYN only)
Four EIA-485 communication lines (LINE 1 ... LINE 4) configured as CT-BUS (four lines) or CT-LOOP (two lines)
Two dedicated EIA-485 lines configured as CT-LOOP
(only H-300 DYN)
Two external EIA-485 communication lines: EXT 1 - for BMS, EXT 2 - for FPS (H-300 DYN only)
Integrated web server with http and https (TLS 1.2) support
Optional GSM modem support using internal USB port
One or two (only H-300 DYN) Ethernet interfaces
Integrated µSDHC card with up to 32GB capacity
MODBUS TCP, RTU and ASCII for digital integration with building management and fire protection (alarm) systems
Visualization of system components on building plan
Automatic detection of network devices (network expanders, luminaires, etc.)
Linear addressing of network devices (logical address)
Additional physical address for easy location of network devices
Logical and physical addresses may be changed during system commissioning from H-312 user interface (local and remote)
Unique hardware address of every network device allows for duplicate physical and logical addresses during system device installation
Nesting of up-to eight network expanders before the destination device
Network expanders operate as signal amplifiers and isolate galvanically network segments
Name and location fields for every network device
Separate device groups for testing, locking, putting into sleep and for control of maintained operation of luminaires
Test intervals and test restriction schedule set independent for every group or all groups at a time
Possibility of mixing devices with different emergency operation time
All functions accessible from LCD available over the web interface


Based on EIA-485 with two-way short-circuit isolation, CT-LOOP allows for robust communication between H-312 and luminaires. The main unit is able to sense which network segment is down (between which devices) and reroute communication from one side of the loop to the other one. This also helps during installation and system commissioning. CT-LOOP permits up to 64 devices per loop with up to eight H-310 or H-311 network expanders between main unit and luminaire. The maximum loop line length (between loop start and loop end) is 1200 meters. As for CT-BUS there is no limit of network expanders beside the physical constraint of 64 devices per loop. Network expanders H-310 or H-311 may also be used for transition between CT-LOOP and CT-BUS. Transition from CT-BUS to CT-LOOP is not possible.


CT-BUS is a network topology which uses the EIA-485 communication standard. Devices are connected in a bus-like topology. CT-BUS allows to connect up to 120 devices (luminaires, network expanders, etc.) on a single bus with a line length of up to 1200 meters. The device count may be further increased by means of intelligent network expanders H-310 or H-311. Up to eight network expanders can be nested between the main unit and luminaire. There is no limit to the number of network expanders beside the physical network constraints of 120 devices per line (either H-312 or H310/H-311).