Ethernet Modules EI 811F

Features 

… IEEE802.3 Ethernet standard 

… Provides 10Base2 compliant communication 

… 32-bit data bus 

… Transmission rate 10 MBit/s 

… Direct memory access to main memory, < 4% CPU overhead for operation 

… Optional battery for redundant battery backup of main memory

Description 

These communication modules provide Ethernet communications to the system bus compliant with IEEE802.3 standard. 

Communications module, compliant with 10Base2 (Cheapernet) for thin coax cable installations.

LED Displays 

State 

Off No supply voltage, module is isolated 

Green Power supply on, module identified and ready to operate as configured. 

Orange Power supply on, module identified and either: 

 — normal transitory state after module startup 

 — configuration mode of Boot Loader 

Orange flashing Power supply on, module identified; module not connected to proper bus structure. 

Red Power supply on and either: 

— module not yet identified (normal for short time during module startup) 

 — error occurred during module test Battery (PM803F) 

 Off AC 800F is active, EI 811F not active 

=>buffering from power supply module 

AC 800F is off (no watchdog of the batteries voltage) =>buffering from battery. 

Orange During battery recovery or start-up phase 

Red Warning: battery low, no battery inserted, insufficient electrical contact etc. 

Green battery inserted and data protection provided. 

Battery (PM802F) 

Off Sufficient buffer battery voltage 

Orange Buffer battery not found or low (insufficient Page 12 June 2006 voltage). 

Front Panel Connections 

Coax connector

Technical Data 

Rated voltage 3.3 V / 5 V, ±3%, from CPU board 

Power consumption max. 2.0 W 

Thin Ethernet 10Base2 

RAM and real-time-clock buffering time 

PM 803F PM 802F 

New battery inserted ≥ 10 days ≥ 1,5 years 

After “Low” warning ≥ 5 hours ≥ 10 days 

Battery 3.6 V lithium battery, 950 mAh (not in the delivery) 

Weight approx. 0.150 kg (without battery)