56 ControlEdge HC900 Process & Safety Controller User and Installation Manual Revision 10
May 2019
Table 4.
2. For 240 Vac applications and temperatures above 56
o
C, or 264Vac, 52
o
C, de-rate the number of ON
inputs per AC input module. (See AC Input de-rating data, see Figure 31.)
3. Limit the number of Analog Output modules to a maximum of 10 per rack. (see Figure 32.)
4. 900U02 modules may not be installed such that the 900U02 is between two 900B16 modules.
900B16 may only be installed in one adjacent slot.
4.8. Installation in Hazardous Location
CSA – Division 2:
1. Control Edge HC900 devices are for rack mounting in a suitable protective enclosure, in accordance
with the Honeywell’s instruction, subject to acceptance by the local authority having jurisdiction.
2. All the HC900 Models mentioned are Equipment Class I, Pollution Degree 2, Installation Category
II, Continuous operation.
FM – Division 2:
Specific condition of use
1. Shall be installed in compliance with then enclosure, mounting, spacing and segregation requirement
of the ultimate user application.
ATEX – Zone 2:
Specific condition of use
1. The 900 Control system must be installed in a location with a minimum degree of protection of IP54
in accordance with EN60079-15 or EN60079-7 and in a tool-secured enclosure which meets the
requirement of EN60079-15 or EN60079-7 in the ultimate application.
2. Control edge IO models are Equipment Class I, Pollution Degree 2, Installation Category II,
Continuous operation.
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