Users Manual

ALL
EFFECTIVITY
© Honeywell International Inc. Do not copy without express permission of Honeywell.
Page 4-23
22 Apr 2019
23-15-49
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
ASPIRE-400
F. SDU Front Panel Interfaces
(1) All silk screen labels for front panel interfaces have the following characteristics:
(a) Color: White
(b) Font: Honeywell Sans Medium.
G. SDU LED Indication
(1) The front panel of the SDU has a GREEN LED labeled 'Power' that is in one of the
following software selectable states:
(a) Deactivated
(b) LED flashed at 1 Hz ± 0.5Hz
(c) LED flashed in anti-phase with the 1 Hz ± 0.5Hz clock
(d) Illuminated steady (Default).
(2) The front panel of the SDU has a RED LED labeled 'Fault' that is in one of the following
states:
(a) Deactivated
(b) LED flashed at 1 Hz ± 0.5Hz
(c) LED flashed in anti-phase with the 1 Hz ± 0.5Hz clock
(d) Illuminated steady (Default) (3) The SDU LEDs is illuminated.
(3) The SDU LEDs are illuminated by default from application of power until commanded by
software.
H. SDU Standalone Identification System (SIS) Interface
(1) The SDU has a 9-way D-SUB Standalone Identification System (SIS) Connector labeled
"SIS" that is accessible on the Front-Panel.
(2) The SDU Standalone Identification System (SIS) Interface has the following
characteristics Table 4-1:
Table 4-1. SDU Standalone Identification System (SIS) Interface Characteristics
Characteristic
Value
14 Connector flange depth below front panel 0.78 inch (20 mm) maximum
15 Access clearance around connector shield
0.32 inch (8 mm) minimum on short edge
0.16 inch (4 mm) minimum on long edge
16 Serial Link Interface Type I2C Bus
17
Serial Link Interface Speed 100 kbps (standard mode)
18
SDA, SCL lines VOL
0.7 V at 3 Ma
19 IDD (with 4.5 V<VDD<5.5 V <150 mA steady-state
<200 mA inrush <500 ms
20 Memory addressing
2-byte I2C address
DRAFT
3rd rvw Draft as of:
29 January, 2020