Table of Contents
Advertisement
Schroff Shelf Alarm Panel (SAP)
21596-077
3 SAP Block Diagram
Figure 4: SAP Block Diagram
ALARM SILENCE
RJ45
RJ45
4 SAP SEEPROM
The SAP SEEPROM is connected to the Master-Only I²C-bus and is a Microchip
24LC256 device.
5 SAP Temperature Sensor
The LM75 temperature sensor measuring the board temperature is located on
the SAP PCB. The temperature sensor is connected to the Master-Only I²C-bus.
www.a-tca.com / www.schroff.biz
User 1
User 2
LED
User 3
Buffer
Critical
PCA9555
Major
I2C-bus I/O port
Minor
0x44
Critical Alarm
Major Alarm
Minor Alarm
Power Alarm
Minor Clear
Major Clear
ESD
protection
ESD
protection
SDA/SCL (I2C Bus CH0)
LM75 Temp.
Sensor
0x96
3.3 V
3
R1.0, February 05, 2008
SAP Block Diagram
SEEPROM
0xa6
SAP Presence
I2C_PWR_A (ShMC1)
I2C_PWR_B (ShMC1)
I2C_PWR_A (ShMC2)
I2C_PWR_B (ShMC2)
INV_ACTIVE_ACB1
INV_ACTIVE_ACB2
Serial Console of
Shelf Manager 1
Serial Console of
Shelf Manager 2
12706921
Advertisement
Table of Contents
