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123-567 Rev. A
3.3.1.2
The ESRS Pressure Switch (PS2) Terminals 3 and 4 connection
x
The ESRS unit has a wire jumper installed across PS2 terminals from
the factory. If the ESRS PS2 terminals are being used, remove the
wire jumper. Leave the wire jumper in-place if the PS2 terminals are
not being used.
x
Install one of the wires from the High Temp Sensor or the Cylinder
Low-Pressure Supervisory Switch to the terminal marked
“
3
”
and
the other wire to the terminal marked
“
4
”
. See Figure 2.
o
Low-Pressure Switch/Auxiliary Cylinder Supervisory Switch -
When the pressure in the cylinder drops to an unserviceable
(low) pressure, the switch shall open activating the early
warning alarm.
o
Temperature Sensor
–
When the temperature in the protected
zone goes above the fixed temperature of the sensor, the
sensor shall open activating the early warning alarm.
3.3.1.3
Power Supply Terminals
–
Main Supply, Backup Supply, and Generator
x
The ESRS Unit has 3 diode-protected inputs but only one power
source is needed to operate the ESRS and should be connected to
“
+
”
and GND. See Figure 2.
o
If available, a backup power source should be connected to one
of the additional power source inputs.
x
Connect the ESRS unit to the power source(s) using a 5A circuit
breaker with an ON/OFF switch. Use the breaker switch to turn the
ESRS Unit OFF when all the machinery is OFF and to turn the ESRS
Unit ON if any machinery is ON.
3.3.1.4
RJ45 Port
x
The RJ45 socket connects the Display Panel to the ESRS unit via a
supplied CAT-5 cable. Install one end of the CAT-5 cable into the
ESRS unit RJ45 socket and the other end into one of the Display
Panel RJ45 socket.
o
Connect Multiple Display Panels to the ESRS unit by using the
available RJ45 socket on the back of the Display Panel.
Check the Display Panel Installation Manual on how to correctly connect and use
the Display Panel.