Chapter 13 Installing EX2 expansion modules
72 CNT-SVN01C-EN
AC-power wiring
Use 16 AWG copper wire for ac-power wiring. All wiring must comply
with National Electrical Code and local codes. Use a UL-listed Class 2
power transformer supplying a nominal 24 Vac (19–30 Vac). The trans-
former must be sized to provide adequate power to the EX2 module
(10 VA) and outputs (a maximum of 12 VA per binary output).
Please read the warnings and cautions before proceeding.
WARNING
Hazardous voltage!
Before making line voltage electrical connections, lock open the supply-
power disconnect switch. Failure to do so could result in death or seri-
ous injury.
WARNING
Hazardous voltage!
Make sure that the 24 Vac transformer is properly grounded. Failure to
do so could result in death or serious injury.
CAUTION
Equipment damage!
Complete input/output wiring before applying power to the EX2 mod-
ule. Failure to do so may cause damage to the module or power trans-
former due to inadvertent connections to power circuits.
CAUTION
Equipment damage!
To prevent module damage, do not share 24 Vac between modules.
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