IHSE USA 461 Series DVXi/ET KVM Extender - Manual (Page 45)

APPENDIX B: RACK MOUNT OPTIONS
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The Rackmount-Kit 455-8G allows, to mount a different count of devices (1…4 pieces):
In the most left position you can mount a rack mountable p.s.u. type 455-PS instead of a
regular device. This p.s.u. is capable to power up to three devices.