HR
X
-C-HB-3
V
IA
L
ITE
HD
C-B
AND
L
INK
H
ANDBOOK
20
Output, Logic High (min)
>4.8V no load
Drive capability
1k ohms
Short circuit protection
No
2.6.4
Logic interface, I2C
Absolute maximum voltage rating
-0.3 to +5.3V
No damage
Input, Logic Low (max)
<1.5V
Input, Logic High (min)
>3.5V
Output, Logic Low (max)
<0.6V no load
Output, Logic High (min)
>4.3V no load
Drive capability
1k ohms
Short circuit protection
No
2.6.5
Logic interface, Open Drain, output
For details of operation see 2.6.3
Operational pull up voltage
0 to 15V
No damage
Maximum load current
50mA
Short circuit protection
No
Note:
Negative voltage on the output will be clamped by the FET body diode; you must ensure that
these do not exceed current rating.
Note: When fitted in a chassis with a controller card (i.e. SNMP and web controller or summary
alarm card) the alarm lines maybe loaded and pulled up, see chassis handbook.
Note: When fitted in a chassis or enclosure adjacent to a RF switch or RF splitter card, alarm lines
maybe loaded and pulled up, see chassis handbook.
2.6.6
Power interface, +12V, input
Nominal input voltage
12V
Maximum operational voltage range
11.5 to 13V
Purple OEM Module include two options for the external power interface, either by the standard 15
way D connection OR via a dedicated 2.5mm concentric / barrel power port, centre positive. These
two interfaces are internal diode or to prevent power being back driven.
2.6.7
Analogue interface, laser diode bias, output
For details of operation see 2.6.7
Typical output voltage
1.25V for 50mA bias current
Typical output voltage range
0 to 2.5V
Maximum output voltage range
-5 to +5V
Short circuit protection
No
