Connecting I/O Modules To Ground - Motorola ACE3600 RTU Owner's Manual

Lead acid batteries will self-discharge if they are stored without charging. Self-
discharge below the manufacturer's recommended voltage will result in internal
permanent damage to the battery rendering it inoperable. When this occurs, if
connected to a power supply/charger, the battery may produce excessive internal heat
and therefore deform and/or leak.
A battery contains diluted sulfuric acid, a toxic and corrosive substance.
Avoid any bodily contact with the leaking liquid when handling leaking
batteries and affected parts. If the battery leaks and the liquid inside touch
the skin or clothing, immediately wash it off with plenty of clean water. If
the liquid splashes into eyes, immediately flush the eyes with plenty of
clean water and consult a doctor. Sulfuric acid in the eyes may cause loss
of eyesight and acid on the skin will cause burns.
Procedure 2-10 How to Connect the Backup Battery
1) Check the battery visually. If the battery looks deformed and / or you notice corrosion on
the battery terminals and / or the battery leaks, DO NOT use the battery and replace it with
a new battery.
2) Check the battery terminal voltage level before connecting it. If the battery voltage is less
than 12.5V DC, DO NOT use the battery and replace it with a charged battery that
measures at least 12.5V DC.
3) If the battery passes a visual inspection and the terminal voltage is correct, plug the battery
cable (FKN8376A/#3089927V10) into the Battery In/Out connector on the power supply
module.
4) Fully charge the battery prior to initial use (~10 hours).

Connecting I/O Modules to Ground

Before operating the I/Os in the ACE3600, the I/O modules must be connected to ground.
Procedure 2-11 How to Connect an I/O Module to Ground
1) Identify the PGND pin(s) on the I/O module using the Module Block Diagram or
Connection Charts in the relevant chapter for the I/O module type. See the symbol
next to the Protective Ground in the Module Block Diagrams.
2) If user-supplied cables are used, connect the ground wire(s) to the PGND pin(s) on the I/O
module and to the grounding strip at the bottom of the RTU. (See grounding strip in
Figure 2-19 above.)
3) If the wired cable braid is used, identify the ground wire(s) based on the wire color (see the
I/O Modules chapter) or the pin number printed on the wire label.
Connect the ground wire(s) from the cable braid to the PGND pin(s) on the I/O module and
to the grounding strip at the bottom of the RTU. (See grounding strip in Figure 2-19
above.)
2-20
Installation