Enrange MLTX2 Intrinsically Safe
Transmitter Instruction Manual
April 2019
Page 17 of 44
NOTE: The Machine Stop Switch is to be used for emergency stopping only, not for normal system shut
down.
3.4
POWER/STATUS AND BATTERY LED
The standard MLTX2 transmitter includes a Power/Status LED to let the operator know that the unit is
functioning and Battery LED to indicate that the battery level is low (see Section 3.6.1 for LED indication
definitions)
NOTE: Single Status/Battery LED equipped units will indicate that the transmitter is on and the battery
level from the single LED (see Section 3.6.2 for LED indication definitions)
3.5
OPTIONAL GRAPHIC USER INTERFACE
The optional LCD screen located at the center of the device provides visual information during the
operation of the MLTX2 transmitter. It is used to change configuration settings, confirm commands being
operated, provide two-way feedback, and display transmitter diagnostic information such as battery life
and signal strength.
The optional graphic user interface replaces the standard status LED when ordered.
3.6
NORMAL OPERATING MODE WITH STANDARD STATUS LED(S)
In normal operating mode, the MLTX2 utilizes the Power/Status and Battery LED(s) to communicate the
watch dog timer within the CPU of the transmitter, the machine stop relay status and when the battery
level is low.
3.6.1
Transmitters Equipped with Separate Power/Status and Battery LED Indicators
3.6.1.1 Watch Dog Indicator (Steady Slow Blinking Green Power/Status LED)
The blinking Power/Status LED represents the watch dog timer within the CPU of the unit. This indicates
that the transmitter is powered on.
NOTE: The Power/Status LED should be continuously blinking at all times. If the LED is not blinking the
transmitter will need to be rebooted to operate properly.
3.6.1.2 Machine Stop Relay Indicator (Rapidly Green Blinking Power/Status LED)
When the receiver is online with the transmitter and the machine stop relay is successfully pulled in, the
Power/Status LED will rapidly blink green.
NOTE: If the receiver inactivity timer times out, the transmitter will revert back to the watch dog indicating
status (steady slow blinking Green Power/Status LED). Following the procedure for pulling in the
machine stop relay in Section 3.2.3 will resume the rapidly blinking green Power/Status LED if the
machine stop relay is successfully pulled in.
NOTE: This LED function is only available on the 2.4 GHz and 900 MHz equipped transmitters. On 433
MHz equipped transmitters, the watch dog indicator function in Section 3.6.1.1 continues to operate after
the machine stop relay is pulled in.
3.6.1.3 Low Battery Level Indicator (Blinking Red Battery LED)
The Battery LED will rapidly flash red when the battery level drops below 10%. The Power/Status LED
will continue blinking for the watch dog indicator and machine stop relay indicator status.
