CM2904 Instruction Book © 2009 - 2022 Parker-Hannifin Corporation Page 12 of 51
Product description
Main Features & functionality
4.3. Main Features & functionality
4.3.1. CM2904 basic architecture
RAM
3kB
FLASH
60kB
MC9S08DV60
CAN
8 x AI
2 x FI
20 x
MDIN
PB0-PB7
0...8V
Signal
Scaling
pullDwn
0...32V
Signal
Scaling
PullUp
2,6V
0...32V
Signal
Scaling
PullUp
2,6V
0...32V
Signal
Scaling
PullUp
2,6V
8
8
4
PA5-PA6
Out
Out
En
Out
Sel
En
En
Sel
Sel
PC4-PC5
PC0
PC1
PC2
5VRefOut
8VRefOut
Batt+
8
8
7
AN
MUX1
AN
MUX2
AN
MUX3
Signal
Scaling
PD4-PD5
Power
Supply
5VRefOut
8VRefOut
PF0
5VRef on
PF1
8VRef on
Batt+
+5V +9V
Buffer
PA1-PA4
PWM Current measure
PE6-PE7
PWM Output status
PF2-PF5
CAN
(optional)
Buffer
MCP
2515
PE2-PE5 SPI
PA0 CLK 8MHz
PG2-PG5 CNTRL
PC6-PC7
2 * LED
(optional)
2 * REF
(5V , 8V)
PWR
LED
(optional)
4 * PWM
Output
Output
FET’s
PWM Current measure
PWM Output status
PD0-PD3
19 x
MDIN
1 * Itag
(optional)
Batt
Batt+
Figure 2: CM2904 architecture
4.3.2. CM2904 Product functions
- Measure and report digital input values.
- Measure and report frequency input values.
- Measure and report analog input values.
- Control PWM outputs in frequency, ramp or ON/OFF modes.
- J1939 compliant communication layer with CAN 2.0b protocol.
- Self-diagnostics and error reporting.
- Provide 5 V and 8 V reference voltages.
