Chapter 5
SCSI Physical Characteristics
Page 52
Filepro CFP2107 Series
Connector Requirements
The drive's connector will mate with a AMP Champ 2-557103-1 vertical
receptacle or the AMP Champ 2-557101-1 right angle receptacle. A mating
connector which is compatible with 0.025 inch (0.63 mm) centerline #30 AWG
solid PVC insulation cabling is AMP Camp 1-557089-3. Refer to figure 2-1 for
the location of the connector on the drive.
Single Connector Attachment (SCA) Signal Definitions
Power
Four +12 Volt signals provide the +12 volt power to the drive. The current
return for the +12 volt power is through the +12 Volt Ground signals. The
maximum current that can be provided to the drive through the +12 Volt signal
pins is 3 Amperes. The supply current and return current must be distributed
as evenly as possible among the pins. The maximum current is while the drive
motor is starting.
Three +5 Volt signal pins p5 volt power to the drive. The current return
for the +5 volt power is through the +5 Volt Ground pins. It is expected that the
+5 Volt Ground will also establish the digital logic ground for the drive. The
maximum current that can be provided to the drive through the +5 Volt signal
pins is 2 Amperes. The supply current and return current must be distributed
as evenly as possible among the pins.
These specifications refer to the connector's characteristics. Refer to Chapter 2
for the drive's power requirements.
Spindle Sync
The spindle rotation of up to 35 drives may be synchronized together by daisy
chaining pin 1 to pin 1 and pin 2 to pin 2 of each drive on connector J3. The
synchronization tolerance is 1%.
Table 5-4
Electrical Characteristics for the Spindle Sync Signal
STATE
Current
Voltage
High
0 < I
IH
< 20
µ
A
2.5 V < V
IH
< V
CC
+ 0.3 V
Low
0 < I
OH
< -48 mA
-0.1 V < V
IL
< 0.4 V
LED Out
The LED out signal is driven by the drive when the drive is performing a SCSI
operation. The LED out signal is designed to pull down the cathode of an LED.
The anode is attached to the 5 volt supply through an appropriate
current limiting resistor. The LED and the current limiting resistor are external
to the drive.
Table 5-5
