
| Operating Temperatures | |
| Storage Temperature | |
| Relative Humidity | 0 to 95% is  | 
| Altitude | 20,000 ft (operating), 40,000 ft (shipping). | 
| Vibration Effect | Withstand 10 to 500 Hz at 1 g on any axis per SAMA | 
| 
 | |
| ESD susceptibility | Field connected circuits meet the requirements of IEC | 
| 
 | |
| EMI susceptibility | Withstand 27 to 1000 MHz per IEC  | 
| 
 | without damage or impairment. | 
| EMI radiation | Meets FCC Rules Part J, Subpart 15, Class A for | 
| 
 | radiated emissions. | 
| 
 | 
 | 
7. APPROVALS
The CIU/485 meets the following approvals:
| Telephone: | FCC Part 68 | 
| Emissions | FCC Part 15 | 
| Environment | UL listed (pending) for use in Class I, Division 2, | 
| 
 | Groups C and D hazardous locations. | 
| Install Op and Diags for MIU Modems and RS485  | Page 6 of 16 |