A standard JACE-6E or JACE-3E controller, or any SRAM-equipped JACE (via SRAM option card), when installed without an integral, rechargeable battery pack (or external 12V battery), provides a “battery-less” installation. This can offers advantages in certain situations. Some example scenarios are:
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Installation of any battery-equipped device is forbidden, due to job site or local regulations.
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Installation without a battery may allow a higher temperature environment rating, such as a JACE-6E or JACE-3E (60 ˚C maximum, vs. 50 ˚C maximum if with a rechargeable NiMH battery pack).
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Over time, the periodic replacement of the NiMH battery in the JACE presents too many costly obstacles—for whatever reason. For example, a JACE may be installed in a difficult-to-reach location. And as the NiMH battery’s condition declines, “battery bad” alarm notifications are received.
You can meet such issues by installing a standard JACE-6E or JACE-3E controller, or if another earlier model (e.g. JACE-2,-6,-7), by removing its NiMH battery pack and installing the SRAM option card, makes the unit “battery-less”. As a consequence of SRAM-only backup support, JACE monitoring of batteries no longer occurs—no more “battery bad” alarm notifications.
A station running in a battery-less JACE has no seamless immunity to “power bumps”. Although all station data, including components,
histories, and alarms, are automatically restored to “pre-event” values as part of station startup (following power restoration),
the briefest power outage results in a controller reboot. For more details, see Battery-less versus battery trade-offs.
Note that a “battery-less” configuration for an SRAM-equipped controller is now one of two possible configurations where SRAM is used. For more details, see SRAM plus battery scenarios.