User Manual

7 65-2649RK-HC-04 M2A Transmitter Operator’s Manual
installation. See “Chapter 8: RS-485 Modbus Output” on page 36 for a description of using
the M2A in a Modbus system.
Ground Jumper
A two pin header with a jumper installed is located along the left side of the terminal PCB.
Leave this jumper in stalled unless directed to remove it for a Modbus installation. See
“Chapter 8: RS-485 Modbus Output” on page 36 for a description of using the M2A in a
Modbus sys t em.
Control PCB
The OLED display and control switches are located on the control PCB. It is in stalled 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 banan a jacks. The jacks
retain the co ntrol PCB.
OLED Display
The OLED display is located at the top o f the control PCB. It indicates the current gas
reading and displa ys messages and parameters in the M2 A’s programs .
Control Buttons
The M2A includes three pus h button switches that allow you to enter the M2A’s operating
modes, navigate through th e mo des, 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 th e right.
Just above each push button switch is a ma gnetic switch with the same function as the
push button sw itch 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 17).
Table 2: M2A Control Button Functions
Switch Function
UP (YES) • Saves settings
• Chang es the dis pl ay ed set t ing
• Ent ers t he Calibration Program
• Enters Gas Type Mode (press with DOWN/NO button)
• Enters Configu rati on Mo de (pres s with EN TER button )
DOWN (NO) • Cancels setting changes
• Chang es the dis pl ay ed set t ing
• Enters Gas Type Mode (press with UP/YES button)
• Enters Modb us Mo de (pres s with ENTER button )
• Displays the Information Screen
ENTER • Initiates operations
• Enters Configu rati on Mo de (pres s with UP/YES button)
• Enters Modb us Mo de (pres s w ith DOW N /NO button)
• Func tio ns as an alarm res et switc h