Installation; Power And Signal Wiring Requirements - Daisy 9017 User Manual

Model 9017 Y/Z-Purge Operator Interface

4 Installation

4.1 Power and Signal Wiring Requirements

Mounting Location
When mounting, Human Machine Interfaces (HMI) and Purge systems must be
positioned to avoid radiated and induced interference. Do not mount the unit in
close proximity to a device that generates strong radiofrequency interference or
electromagnetic interference. HMI and Purge systems must be also positioned to
avoid exposure to excessive heat. Do not mount the unit in close proximity to a
steam line, heated vat or oven.
Gland Plates
Before modifications can be made, Gland Plates must be removed. Please note that
metal shavings are detrimental to electronic systems.
Machining
Only make enclosure penetrations in designated locations. All metal shavings must
be collected and removed.
Wiring Requirements
AC power inputs require dedicated circuits or feeds. Power from lines or circuits
shared by motors, drives, welders, arc furnaces, or inductive lighting is not
acceptable. Conduits for HMI and Purge power should be separated from other
conduits to prevent radiated or induced interference. Devices that produce spikes,
surges, and brownouts are detrimental to computers, and can corrupt data and
interfere with purging systems. Do not use a transformer or other device to step
down a three phase circuit to run a HMI or Purge System.
Communication wires and signals should be run in separate conduits and routed
away from power conduits. Providing isolation to prevent emissions from other
conduits is essential to data integrity. Long runs of parallel signal lines can cause
"cross-talk" and corrupt data making communications unreliable or impossible.
DC power should be provided by a dedicated power source. If multiple units must be
powered from a single DC supply, the power cables must be run directly from the unit
to the supply. Chaining power from one unit to the next is unacceptable. Units can
interfere with each other by developing noise due to the resistance of the wires. The
filtering is provided by the source or power supply.
Additional Wiring
It is not permitted to run wiring through the unit that is nonessential to the unit. The
cabinet is not a junction box.
Adding Additional Equipment
Installing additional equipment in units approved for hazardous classed environments
violates the approval of the unit.
February 2022 5
Daisy Data Displays, Inc.
D011-000002