Honeywell KHF 1050, System Installation Manual

Page: 125 / 204

N
KHF 1050 SYSTEM INSTALLATION MANUAL
Page 2043
Revison 2
23-10-09
Apr/2006
6.E. PS440 (or other compatible) CDU Installation
6.E.(1) Perform the installation procedures as follows:
6.E.(1)(a) Select the desired location for the control panel.
6.E.(1)(b) Make the appropriate cutout (if necessary), Refer to “Figure 2020 - PS440
Control Display Unit Outline and Mounting” for outline dimensions.
6.E.(1)(c) Pull the mating connector assembly through cutout hole and mate to
connector J1 of the control panel.
6.E.(1)(d) Verify the locking devices are secure to the connector J1 to ensure
trouble-free operation.
6.E.(1)(e) Install the Control Panel in the cutout until flush and tighten the two Allen
head screws which are recessed into the front bezel, to secure in place.
Note: For installation information on the MC-850 MCDU, refer to the
MC-850 installation documentation pertinent to each specific
application.
Note: For installation information on the Primus
®
II SRZ-85X Integrated
Radio System Operation and Installation Manual P/N:
A15-3800-001.
6.E.(2) PS440 Lighting Adjustments
The PS-440 HF control panel is capable of dimming the display, panel, and
annunciator lighting from either a 5 VAC, 5 VDC or 28 VDC lighting bus source.
The dimming bus pins only sense the voltage being applied. Minimal current is
drawn from the dimming bus inputs. All lighting current is drawn from the 28
VDC input power pins of the panel.
The dimming curve for the panel lighting follows a standard curve from
extinguished lighting at 0 V to full bright at the maximum voltage on the
appropriate dimming bus. The dimming curve for the display backlighting and
annunciator lighting follow a similar curve. However, when the dimming bus
voltage is less than approximately 20% of the maximum voltage (based on
dimming bus input used: 5 V or 28 V), the display and annunciator lighting will
trip to a full bright condition (maximum illumination).
NOTE: Later software releases allow a maximum brightness adjustment. The
“full bright'' condition occurs during daylight hours when no dimming
bus voltage is present.