Battery Compartment

Overview

1 CompactFlash card slot

2 Battery compartment

The battery compartment is located under the operating cover of the controller. The controller battery helps maintain controller data (BIOS cmos, NVRAM, RTC).

Maintenance Interval

The estimated maintenance interval for replacing the battery is 5 years. If the device (with battery installed) is not used for an extended period of time, you should verify/replace the battery.

Measuring the Battery

To measure the battery, proceed as follows:

Step	Action
1	Remove battery and then make the manual measurement.
2	Or observe the diagnostic message 037 Battery low in the IEC program and display it on an HMI (panel), if necessary.
3	Replace battery three days after the first diagnostic message at the latest.

Replacing the Battery

While lithium batteries are preferred due to their slow discharge and long life, they can present hazards to personnel, equipment and the environment and must be handled properly.

DANGER
	EXPLOSION, FIRE, OR CHEMICAL BURNS Replace with identical battery type. Follow all the instructions of the battery manufacturer. Remove all replaceable batteries before discarding unit. Recycle or properly dispose of used batteries. Protect battery from any potential short-circuit. Do not recharge, disassemble, heat above 100 °C (212 °F), or incinerate. Use your hands or insulated tools to remove or replace the battery. Maintain proper polarity when inserting and connecting a new battery. Failure to follow these instructions will result in death or serious injury.

DANGER

EXPLOSION, FIRE, OR CHEMICAL BURNS

Replace with identical battery type.
Follow all the instructions of the battery manufacturer.
Remove all replaceable batteries before discarding unit.
Recycle or properly dispose of used batteries.
Protect battery from any potential short-circuit.
Do not recharge, disassemble, heat above 100 °C (212 °F), or incinerate.
Use your hands or insulated tools to remove or replace the battery.
Maintain proper polarity when inserting and connecting a new battery.

Failure to follow these instructions will result in death or serious injury.

Step	Action
1	You can change the battery while the controller is on or off. There is no loss of data when it is performed with the controller on. When the controller is switched off, the hold up time for the data without a battery is approximately 30 seconds.
2	Use pliers with insulated tips to lightly pull the battery out of its slot.
3	Carefully place the new battery on the guide and lightly push it into the device.

NOTE: Replacement of the battery in the controllers other than with the type specified in this documentation may present a risk of fire or explosion.

WARNING
	IMPROPER BATTERY CAN PROVOKE FIRE OR EXPLOSION Replace battery only with identical type: 3 V Lithium Renata Type CR2450N. Failure to follow these instructions can result in death, serious injury, or equipment damage.