MSA SENTRY io User Manual

8 SENTRY io US
2 Overview
2.2 Control Unit
2.2.1 Wall Mount Enclosure
The SENTRY io:
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is housed in a fiberglass enclosure with dimensions of 558.8 mm x 447.68 mm x 241.3 mm (22 in x 17.62 in x 9.5in)
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has pre-configured holes provided on the bottom surface of the enclosure (for ¾” NPT knockout or M20)
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is mounted by four screws (10-32 or M4).
2.2.2 Power Supply
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The 24 VDC, 10A power supply accepts main AC power.
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The SENTRY io uses a COSEL power supply (PN: KHNA240F-24) or equivalent - for specifications, please refer to
the COSEL product page.
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The COSEL KHNA240F-24 complies with SELV requirements as per UL 60950-1 and OSHA Class I Div. 1
requirements.
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Battery backup is an available option.
Backup Battery
The SENTRY io has an optional battery back-up package available from MSA. Consult the factory for pricing and
availability. This battery back-up cabinet provides approximately 1 hour of battery run-time upon AC failure.
This battery back-up package is contained in its own enclosure and requires an interconnection between the main
SENTRY io cabinet and the battery back-up cabinet. The details of that interconnection are shown below:

MSA SENTRY io Specifications

General

Brand	MSA
Model	SENTRY io
Category	Controller
Language	English