The Allen-Bradley 1756-ESMCAP is a Capacitor-based ControlLogix Energy Storage Module (ESM). It comes installed with the ControlLogix L7 and GuardLogix L7 controllers instead of a battery. It provides power for saving the program to Nonvolatile Storage (NVS) memory if power is switched off. It can also clear the program from NVS memory of the 1756-L7x controller. The 1756-ESMCAP has an embedded real-time clock to update the controller’s time.
The 1756-ESMCAP module draws a current of 330 mA at 5.1V DC and has a maximum power dissipation of 13.3 watts. It can be installed in any slot in a ControlLogix system chassis and has an open enclosure. It has an operating temperature range of 0 - 60 Degrees Celsius and a 30g shock absorption capacity. The 1756-ESMCAP is made for use in a clean, dry industrial environment with Overvoltage Category II standards. It begins charging after installation in a 1756-L7x controller indicated by ESM Charging and CHRG status indicators.
