Power requirements
Protection: Power inputs are protected against surge, over-voltage, over-current, and reverse power. IEC 61000-4 Class 4 level.
Power In Terminal:
- Supply Voltage: 10 to 36 VDC
- Sustained Supply Voltage without Damage: 38 VDC
Vehicle Power Connection: When primary power is pulled from the vehicle power system, a second power supply OR charge regulator may be required to overcome the voltage drop at vehicle start-up.
USB Power: Functions that will be active with USB 5 VDC applied include sending programs, adjusting data logger settings, and making some measurements. If USB is the only power source, then the CS I/O port and the 5V, 12V, and SW12 terminals will not be operational.
Internal Lithium Battery: AA, 2.4 Ah, 3.6 VDC (Tadiran TL 5903/S) for battery-backed SRAM and clock. 3-year life with no external power source.
Average Current Consumption (typ. at 20 °C):
| Operating state | 12 V Supply voltage | 24 V Supply voltage |
|---|---|---|
| Idle | 2.0 mA | <1.0 mA |
| Active 1 Hz Scan | 2.0 mA | 1.1 mA |
| Active 20 Hz Scan | 57 mA | 36 mA |
| Serial (RS-232/RS-485) | Active + 25 mA | Active + 16 mA |
| Ethernet Power Requirements: | ||
|
Ethernet 1 Minute |
Active + 1 mA | Active + 0.7 mA |
|
Ethernet Idle |
Active + 4 mA | Active + 2.6 mA |
|
Ethernet Link |
Active + 47 mA | Active + 31 mA |