Machine Controllers
for Environmental Specifications table.
| Operating Characteristics/Specifications | A4 & A5 ECU Model | ||||
|
Standard Housing |
|||||
| Air cooled |
Yes
|
Yes
|
Yes
|
||
| Military Housing |
Yes
|
Yes
|
Yes
|
||
|
Inputs |
|||||
| Switch to Ground |
35
|
25
|
--
|
||
| Switch to Battery (+Ba) |
3
|
--
|
--
|
||
| Config. Switch to Ground/Switch to Battery |
--
|
--
|
6
|
||
| Key Switch (+Bat) |
1
|
1
|
1
|
||
| Neutral Start Input |
1
|
1
|
--
|
||
| Analog Input (Active) |
2
|
--
|
--
|
||
| Analog Input (Passive) |
4
|
3
|
--
|
||
| Prog. Analog Input (Active/Passive) |
--
|
--
|
8
|
||
| PWM Frequency Input Switch to Ground |
16
|
11
|
6
|
||
| PWM Input (High Accuracy) |
4
|
--
|
--
|
||
| Speed Input (Passive)* |
6
|
4
|
4
|
||
| Programmable 5V/8V Sensor Supply @ 330mAdc |
--
|
--
|
2
|
||
| Battery Monitor |
1
|
1
|
--
|
||
| R-Terminal Input |
1
|
1
|
--
|
||
|
Sensor Power Supplies |
|||||
| 5v Sensor Supply (200mAdc) |
1
|
1
|
--
|
||
| 8v Sensor Supply (400mAdc) |
1
|
1
|
--
|
||
| One 10v Sensor Supply (3A) |
1
|
--
|
--
|
||
|
Commucation Links |
|||||
| CAN Data Link |
2
|
1
|
2
|
||
| ATA |
1
|
--
|
1
|
||
| Outputs | |||||
| On/Off Sourcing Drivers (2.0A) |
6
|
4
|
--
|
||
| On/Off Sinking Drivers (300mA) |
8
|
8
|
4
|
||
| Digital Pulse Out Sink Dr (40mA) |
--
|
--
|
--
|
||
| PWM Driver, 1 wire (2.0A) |
10
|
8
|
--
|
||
| PWM Driver, 2 wire (2.0A) |
2
|
--
|
8
|
||
| Low Level Sinking Driver |
--
|
--
|
--
|
||
|
Processing Elements |
|||||
| Microprocessor |
MPC555
|
MPC555
|
MAC 7131
|
||
| Processor Speed |
40MHZ
|
40MHZ
|
40MHZ
|
||
| Flash ROM |
2MB
|
2MB
|
512KB
|
||
| SRAM |
256KB
|
256KB
|
160KB
|
||
| EEPROM |
32KB
|
32KB
|
32KB
|
||
*For single-ended inputs, one line is left open

United States / Canada [change]
Visit Caterpillar.com