95-8533
4-17
18.2
SYSTEM STARTUP
PRE-OPERATION CHECKS
General
Insulate all shields to prevent shorts to device
housing or to any other conductor.
Place alarm/release output in “Bypass/Isolate”
when servicing devices.
Maintain a log book containing the type and
serial numbers of devices as well as the
location and date of installation.
Maintain a log of maintenance activities.
Observe normal precautions for handling
electrostatic sensitive devices.
LON
Rocker switches for each LON device must be
set to the desired address prior to power-up.
Test the loop with no power applied. DC
resistance should be equal on A and B.
Check polarity on A and B (no rolls). COM
1 connects to COM 2; COM 2 connects to
COM 1. A connects to A and B to B.
Measure voltage. A to chassis ground
measures approximately +7.5 Vdc. B to
ground measures approximately –7.5 Vdc.
Measure signal (400 mv P-P min.). (Use
oscilloscope if possible.)
Check fault tolerance by introducing a short.
Controller
The I/O and LON wiring is correctly installed,
observing polarity. All cable shields are
properly terminated and insulated.
Power wiring is installed and power source is
operational.
Chassis ground stud must be connected to
earth ground.
Redundant Controller
The I/O and LON wiring is correctly installed,
observing polarity. All cable shields are
properly terminated and insulated.
Power wiring is installed and power source is
operational.
Chassis ground stud must be connected to
earth ground.
The HSSL cable is connected between the two
controllers.
EDIO/DCIO Module
Verify correct address setting.
Check signal circuits for correct polarity.
Check for correct installation of EOL resistors.
Relay Module
Verify correct address setting.
Check for correct output connections.
Analog Input Module
Verify correct address setting.
Check for correct input connections.
Check each channel with a loop current input.
Power Supplies and Power Monitors
Verify all earth ground connections as specified
in the wiring instructions.
Verify correct ac power to supply.
Check power distribution to ensure that all
devices are receiving power.
Check power trouble indicator by introducing
an open to the battery.