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65-2619RK-CH4-4 M2 Transmitter Operator’s Manual
Termination Jumper
A two pin header with a termination jumper installed is located below the Modbus
terminal strip. The jumper has no function unless the M2 is wired into a Modbus
installation. See “Chapter 8: RS-485 Modbus Output” on page 35 for a description of using
the M2 in a Modbus system.
Control PCB
The LCD display and control switches are located on the control PCB. It is installed on top
of the terminal PCB by lining up its three spacing standoffs with the banana jacks in the
terminal PCB mounting standoffs and pushing it onto the banana jacks. The jacks retain
the control PCB.
LCD Display
The LCD display is located at the top of the control PCB. It indicates the current gas
reading and displays messages and parameters in the M2’s programs.
Control Buttons
The M2 includes three push button switches that allow you to enter the M2’s operating
modes, navigate through the modes, update settings, and save changes to the settings.
The push button switches are located along the bottom edge of the control PCB (see
Figure 2). The UP/YES button is on the left, the DOWN/NO button is in the middle, and
the ENTER button is on the right.
Just above each push button switch is a magnetic switch with the same function as the
push button switch below it. The magnetic switches are for use in non-intrusive
calibration. They are actuated by bringing the magnetic wand close enough to them to
actuate them. Although the magnetic switches have the same functions as the push button
switches, it is not practical to use them for operations other than calibration because it is
not possible to actuate two magnetic switches at once with only one magnetic wand. Since
displaying the Information Screen only requires the use of one switch, the wand may be
used to show the Information Screen (see “Information Screen” on page 16).
Table 2: M2 Control Button Functions
Switch
Function
UP (YES)
•
Saves settings
•
Changes the displayed setting
•
Enters the Calibration Program
•
Enters Gas Type Mode (press with DOWN/NO button)
•
Enters Configuration Mode (press with ENTER button)
DOWN (NO)
•
Cancels setting changes
•
Changes the displayed setting
•
Enters Gas Type Mode (press with UP/YES button)
•
Enters Modbus Mode (press with ENTER button)
•
Displays the Information Screen
ENTER
•
Initiates operations
•
Enters Configuration Mode (press with UP/YES button)
•
Enters Modbus Mode (press with DOWN/NO button)
•
Functions as an alarm reset switch
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