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ISM 824 Integration Scaling Multiswitcher • Installation
Mounting the Switcher
If the ISM 824 is to be rack mounted, it is important to mount it before cabling it.
Four uninstalled rubber feet are included with the ISM 824. Install the feet only if
the unit is to be mounted on a table top (see “Tabletop placement” below).
Tabletop placement
For tabletop placement, install the self-adhesive rubber feet/pads (provided) onto
the four corners of the bottom of the device.
UL requirements for rack mounted devices
The following Underwriters Laboratories (UL) requirements pertain to the safe installation of the
ISM 824 in a rack.
1. Elevated operating ambient temperature — If installed in a closed or multi-unit
rack assembly, the operating ambient temperature of the rack environment may
be greater than room ambient temperature. Therefore, install the ISM 824 in an
environment compatible with the maximum ambient temperature
(Tma = +122 °F, +50 °C) specied by Extron.
2. Reduced air flow — Install the equipment in a rack so that the amount of air flow
required for safe operation of the equipment is not compromised.
3. Mechanical loading — Mount the equipment in the rack so that a hazardous
condition is not achieved due to uneven mechanical loading.
4. Circuit overloading — Connect the equipment to the supply circuit and consider
the effect that circuit overloading might have on overcurrent protection and
supply wiring. Appropriate consideration of equipment nameplate ratings should
be used when addressing this concern.
5. Reliable earthing (grounding) — Maintain reliable grounding of rack-
mounted equipment. Pay particular attention to supply connections other
than direct connections to the branch circuit (e.g. use of power strips).
Rack mounting
To rack mount the ISM 824, use two screws on each end of the switcher to attach the
switcher to the rack (see figure 2-1).
Figure 2-1 — Mounting the ISM 824 Multiswitcher