Compact I/O High-speed Counter Module
7
Publication 1769-IN030B-EN-P - October 2010
Module Installation
The 1769-HSC module is suitable for use in an industrial environment when installed in
accordance with these instructions. Specifically, this equipment is intended for use in clean, dry
environments (Pollution Degree 2
(1)
) and with circuits not exceeding Over Voltage
Category II
(2)
(IEC 60664-1).
(3)
Removal and Insertion Under Power (RIUP)
Removable Terminal Block (RTB) Under Power
Hazardous Location Enclosure
(1)
Pollution Degree 2 is an environment where, normally, only non-conductive pollution occurs except that occasionally a
temporary conductivity caused by condensation shall be expected.
(2)
Over Voltage Category II is the load level section of the electrical distribution system. At this level transient voltages are
controlled and do not exceed the impulse voltage capability of the product’s insulation.
(3)
Pollution Degree 2 and Over Voltage Category II are International Electrotechnical Commission (IEC) designations.
WARNING:
When you insert or remove the module while backplane power is on,
an electrical arc can occur. This could cause an explosion in hazardous location
installations.
Be sure that power is removed or the area is nonhazardous before proceeding.
Repeated electrical arcing causes excessive wear to contacts on both the module
and its mating connector. Worn contacts may create electrical resistance that can
affect module operation.
WARNING:
When you connect or disconnect the removable terminal block (RTB)
with field side power applied, an electrical arc can occur. This could cause an
explosion in hazardous location installations.
Be sure that power is removed or the area is nonhazardous before proceeding.
WARNING:
When used in a Class I, Division 2, hazardous location, this equipment
must be mounted in a suitable enclosure with proper wiring method that complies
with the governing electrical codes.