Net Safety MAN-0069, User Manual

Page: 11 / 20

Net Safety Monitoring Inc.
Modbus Controller & 4-20 Fire Head 7
STEP 4 — O
PERATE
The Controller faceplate contains most functional elements of the user interface. Below is a description of that functionality.
Figure 9: Controller Functionality
* Fire Heads do not require calibration. The button is used for reset and setup.
Status
Red
Slow Flash:
Gas present
Flast flash :
Cal or Fault
Solid:
Overrange
Pull
Here
Green
Short Blips:
Normal
operation.
No gas
present
Cal/R
eset
Mag
net
On S
ide
Off
Power
On
Pull
Here
Current O/P Check
Connect current probes
to meter jacks and
read mA output
Calibration/Setup
-Hold Cal/Reset or
magnet until countdown
is zero (~10 sec)
-Follow instruction on
display
Magnetic Reed Switch - provides non-intrusive access for
programming and resetting.
-Place magnet against Housing (where indicated) for less than one
second to initiate a basic system reset (clear a latched alarm) and
make selections.
-Place magnet against Housing (where
indicated) and hold to program and view
current settings.
Refer to "Magnetic Reed Switch" on page 8
for further information.
Scrolling 8-character display -
provides various status messages and
prompts. Refer to Table 4, "Current
Output, LEDs and Display
Messages", on page 10.
Pull Here knob - unscrew the two
screws and gently pull to remove
faceplate. Removal allows access
to the PCB boards. The faceplate
remains attached by the ribbon
cable.
Status Light (Red and Green) -
indicates status of unit. Refer to
Table 4, "Current Output, LEDs and
Display Messages", on page 10 for
detailed explanation of states/status.
Current Test Jacks - to take current loop measurements use the following procedure:
-Insert your current meter leads into the Test Jacks.
-Set external devices to bypass, if necessary, to avoid unwanted alarm response
-Review current loop measurements.
Refer to "Current Loop Measurement (Test Jacks)" on page 8 and Table 4, "Current Output, LEDs and
Display Messages", on page 10.
Calibration Button* - provides intrusive
access for programming and resetting.
-Push for less than one second to initiate a
basic system reset (clear a latched alarm)
and make selections.
-Push and hold to program and view
settings.
Refer to "Calibration Button" on page 8 for
further information.
ON/OFF Switch - used to turn Controller on and
off. Housing must be removed to access.
Pull Here knob - unscrew the two screws
and pull to remove faceplate. Removal
allows access to the PCB boards. The
faceplate remains attached by the ribbon
cable.