3055 Del Sol Blvd • San Diego, CA 92154 • 1-800-LAMBDA-4
THR4-SSERIES POWER SYSTEM
Revision A4 : August, 2009
Page. 19
Table 8
Alarm and Signal Interconnections
20
BLK
Shelf Bias: A regulated 12V/100ma bias supply. Referenced to Pin 10.
19
RED
SCL: I
2
C clock line. Referenced to Pin 10.
18
RED/WHT
SDA: I
2
C clock line. Referenced to Pin 10.
17
RED/BLK
Logic Ground: Isolated ground for opto-coupled alarms, connect to Pin 10.
16
GRN/WHT
Module Disable: Opto-coupled input. Applying 5V between this pin
and Pin 17 will disable all modules in the rack.
15
LT BL
Module 0 (leftmost slot) AC Fail.
14
LT BL/WHT
Module 1 AC Fail
13
LT BL/BLK
Module 2 AC Fail
12
YLW/WHT
Module 3 AC Fail
11
YLW/BLK
Not Used
10
TAN/WHT
V Main Output (-). DC power ground.
9
TAN/BLK
I Shelf: Indicates average rack current. Ratio varies with power
module type. Call factory for details.
8
TAN
Open
7
GRN/BLK
Open
6
GRN
Module Thermal Limit Failure
5
OR/WHT
Module 0 (leftmost slot) DC Fail.
4
OR/BLK
Module 1 DC Fail
3
OR
Module 2 DC Fail
2
WHT
Module 3 DC Fail
1
YLW
Module Present
J1
Wire
Description
Pin
Color
8 Replacement Items
The power modules are modular field replaceable (hot swappable) units. In the event that a
power module needs to be removed, press the latch button on the front of the power module,
and pull the handle until the power module slides out of the slot. Open the latch on the new
power module and slide it into an empty slot. Close the latch and the power module will start up
automatically and will begin sharing current.
If an optional NIC is installed the power module will automatically set the voltage specified by the
NIC, otherwise it will be at the factory default.
