EXL6 User Manual
CHAPTER 3: MECHANICAL INSTALLATION
Note: The datasheet is the first document to refer to for model-specific information related to EXL6
OCS models such as pin-outs, jumper settings, and other key installation information. Visit the Horner
websites to obtain datasheets, user documentation, and updates.
3.1 Overview
The mechanical installation greatly affects the operation, safety and appearance of the system.
Information is provided to mechanically install the unit such as cut-out sizes, mounting procedures and
other recommendations for the proper mechanical installation of the unit.
3.2 Mounting Requirements
3.2.1 Mounting Procedures (Installed in a Panel Door)
Figure 3.1 – Panel Mounting of an EXL6 Series OCS
Once the panel design has been completed using the criteria and suggestions in the following sections,
use the following steps to panel mount the EXL6 OCS.
1.Remove all connectors from the EXL6 OCS unit.
2.Make sure the gasket is installed on the EXL6 OCS and is free from dust and debris. Check that the
corners of the gasket are secure.
3.Pass the unit through the panel.
4.Insert each of the ten (10) mounting clips into the slots in the EXL6 OCS case. One clip should be
installed on each corner. Lightly tighten each screw so the clip is held in place.
5.Tighten the screws on the clips such that the gasket is compressed against the panel. Recommended
torque is 7-10 lb/in (0.8-1.13 Nm.)
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3.3 Mounting Orientation
3.3.1 EXL6 OCS Mounting Clip
001XLQX007
Figure 3.2 – EXL6 OCS with Mounting Clips
3.3.2 EXL6 OCS Mounting Orientation
Figure 3.3 – Orientation of EXL6 OCS
NOTE: There are no orientation restrictions on the EXL6 OCS. However, the above orientation provides for
optimum readability of the screen and ease of use of the keypad.
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3.4 Panel Cut-Out
For installations requiring NEMA 4X liquid and dust protection the panel cutout should be cut with a
tolerance of ± 0.005” (0.1 mm).
R .125” [3 mm] TYP.
5.156” RADIUS CORNERS
[131mm] WHEN REQUIRING
DUST OR WATER
TIGHT SEAL PER
NEMA 4, 4X OR 12
6.875”
[175mm]
001OCS003-R1
Figure 3.4 – Panel Cutout Tolerance
3.5 EXL6 Dimensions
Figure 3.5 – EXL6 OCS Dimensions
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3.6 Factors Affecting Panel Layout Design and Clearances
Warning: It is important to follow the requirements of the panel manufacturer
and to follow all applicable electrical codes and standards.
The designer of a panel layout needs to assess the requirements of a particular system and to consider
the following design factors.
3.6.1 Clearance / Adequate Space
Install devices to allow sufficient clearance to open and close the panel door.
Table 3.1 – Minimum Clearance Requirements for Panel Box and Door
Minimum Distance between
2 inches (50.80mm)
base of device and sides of cabinet
Minimum Distance between
1.5 inches (38.10mm)
base of device and wiring ducts
If more than one device installed in panel box (or
on door): Minimum Distance between bases of 4 inches between bases of each device (101.60mm)
each device
When door is closed:
Minimum distance between device and closed 2 inches (50.80mm)
door (Be sure to allow enough depth for the OCS.)
3.6.2 Grounding
Warning: Be sure to meet the ground requirements of the
panel manufacturer and also meet applicable electrical codes and standards.
Panel box: The panel box must be properly connected to earth ground to provide a good common
ground reference.
Panel door: Tie a low impedance ground strap between the panel box and the panel door to ensure that
they have the same ground reference.
3.6.3 Temperature / Ventilation
Ensure that the panel layout design allows for adequate ventilation and maintains the specified ambient
temperature range. Consider the impact on the design of the panel layout if operating at the extreme
ends of the ambient temperature range. For example, if it is determined that a cooling device is
required, allow adequate space and clearances for the device in the panel box or on the panel door.
3.6.4 Orientation
When panel-mounted, there are no orientation restrictions on the EXL6 OCS.
3.6.5 Noise
Consider the impact on the panel layout design and clearance requirements if noise suppression devices
are needed. Be sure to maintain an adequate distance between the EXL6 OCS and noisy devices such as
relays, motor starters, etc.
For details on output protection, especially when using contactors, solenoids… see MAN0962-01-EN.
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