XMART Optima-RACK 10K - Manual (Page 18)

USER MANUAL - OPTIMA UPS 6K/ 10K (ENGLISH)
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20140805 Tower-Rack 6K-10K ISOTX - 18
RACK TYPE UPS 6-10K
Optional ISOTX Module for RACK UPS 6-10K
ISOTX module is optional accessory rack module. UPS AC output must be connected to ISOTX input as indicated. ISOTX
outputs can be configured as tower UPS models.