System Manager Electrical Requirements
These are the electrical requirements for the System Manager. It explains the proper conditions and
conguration options. The system Manager should be installed, powered, and have the proper con-
guration completed prior to installing the Nodes or the Sensors.
For the best commissioning results follow the recommended installation sequence.
1. Install the System Manager: connect power to it.
2. Install the receiving antennas.
3. Install the sending antennas.
4. Power up the Nodes and install in position.
5. Install the Sensors, verifying proper operation as they are installed.
Electrical Power Requirements and System Control
1. Power requirement: 115 Vac, 15 AMP, clean power, dedicated.
2. Interface to Plant Control System (this is set up in the HazardPRO system manager under the
PCSI icon).
To ensure the proper operation of the System there are two required elements.
1. A Run signal that is “ON” whenever a piece of equipment is running. This Run signal must turn
“OFF” when the equipment is stopping or stopped. The system needs to be able to identify when
the equipment is running. This Run signal is supplied to the Run relay and the associated Run/
Stop logic.
2. The System Manager will keep the N.O. contacts of the run relay closed when the equipment is
running and there is not a shutdown alarm. If there is a shutdown alarm condition or the equip-
ment is stopped, the relay will be de-energized and the N.O. contacts will open.
There are two options for supplying this run signal to the HazardPRO system. One utilizes the Run
relays in the HazardPRO enclosure; the second option utilizes a Modbus TCP/IP connection directly
to the HazardPRO touch screen without using relays.
____ Option A: The Run signal is supplied from the run/stop circuit for the equipment; this connects
directly to a run relay on the Relay I/O board. A neutral/common is also required for a reference to the
Run/Stop logic.
____ Option B: The Run signal is communicated by the PLC to the HazardPRO touch screen. A Mod-
bus TCP/IP interface communicates with a bank of Modbus registers that are read/written by both the
PLC and the HazardPRO touchscreen. There is a register for each piece of equipment and by set-
ting various values in the register, both the PLC and the HazardPRO touch screen know if a piece of
equipment is running, stopped, or in an alarmed condition. An Ethernet cable is used to connect the
PLC to the HazardPRO touch screen.
Section B
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