Specifications

CI-1 and CI-8 Communications Interface
2-4
MOUNTING
Double-sided foam tape is provided with the CI-8. When applied to the back of the unit, the tape
permits mounting on almost any surface.
The unit should be installed in an electrical equipment cabinet, such as the NEMA Type 1 Panel
Enclosure, which is designed to house electrical and electronic controls that do not require an
oil- or dust-tight atmosphere. Is may be convenient to mount the CI-8 in the same cabinet as the
ACUs. The cabinet should provide:
1. Wiring clearance of 6 in (15 cm) around the edges of each unit.
2. Service clearance of approximately 8 in (20 cm) at the front of each unit.
3. Adequate ventilation to meet operating temperature and humidity specifications.
When selecting an installation location, ensure that the following requirements are met:
1. Within 2000 ft of each ACU (distance measured in cable length).
2. Within 25 ft of the RS-232C host interface
3. Minimum of 6 ft (2 m) from high voltage or high power equipment.
4. Minimum of 3 ft (1 m) from telephone cabling or equipment.
5. Free from all corrosive fumes and vapors.
6. CI-8 backup batteries should not be installed in the same cabinet as the ACU or power
supply.
POWER
The CI-8 requires a power source which can provide a nominal 18 VAC, 750 mA, 13.5 WVA,
minimum. This can be provided by the WSE 3718S Uninterruptible Power Supply, WSE 3018S
Power Module or a transformer. Connections are shown in Figure 2-3.
If power is supplied by a transformer or 3018S Power Module, two 12V batteries are recommended
as a backup in the event of a power loss. The batteries should be rated for 20 amp-hours.