Alpha Technologies XP-EDH4 - Technical Manual - Manual (Page 73)

73 745-419-B0-001 Rev. A (11/2013)
3.0 Configuration and Operation, continued
3.10.4 Generic (AUX) I/O Cable
The pin number configuration for the generic I/O cable is shown in the table below.
Table 3-14, Pin Number Configuration, Generic (AUX) I/O Cable
Pin Description Type
1 EDH4 Ground Common
2 N/A N/A
3 N/A N/A
4 N/A N/A
5 N/A N/A
6 N/A N/A
7 N/A N/A
8 N/A N/A
9 N/A N/A
10 N/A N/A
11 N/A N/A
12 3.3 VDC 53.6 ohm series resistor SPI Clock
13 3.3 VDC 53.6 ohm series resistor SPI MOSI
14 3.3 VDC 53.6 ohm series resistor SPI MISO
15 3.3 VDC 53.6 ohm series resistor SPI CS
16 3.3 VDC 53.6 ohm series resistor Handshake 2
17 3.3 VDC 53.6 ohm series resistor Handshake 1
18 Processor Reset Output
19 AUX PWR IN Spare Input Power Connection 24 - 60 VDC
20 AUX PWR OUT (0.75 A fuse) +3.3 VDC
3.10.5 Battery Heater Mat Connector
The pin number configuration for the four-pin control (CNTL) connector for the battery heater mat
controller is shown in the table below.
Table 3-15, Pin Number Configuration, Battery Heater Mat Connector
Pin Description Type
1 Ground Ground
2 5 V through 0.75 A PTC resettable fuse +5 VDC
3 Open drain digital output 3 driver, 53.6 ohm series resistor current
limiter (1/16W)
Digital Output
4 Digital Input 3, pulled up 3.3 VDC with 10K, then 10K resistor to
processor
Digital Input