SIMPLEX 4100 565-004 F REV B RS232 / 2120 DUAL COMMUNICATION FIRE ALARM BAORD

SIMPLEX 4100 565-004 REV C RS232 / 2120 DUAL COMMUNICATION FIRE ALARM BAORD

SIMPLEX 4100 565-004 D REV D RS232 / 2120 DUAL COMMUNICATION FIRE ALARM BAORD

SIMPLEX 4100-6038 565-415 F REV F RS232 / 2120 FIRE ALARM MODEM CARD

Simplex 565-004 RS232 Serial Dual Communication Card

Simplex 565-004 RS232/2120 Modem Card

Simplex 565-415 RS232/2120 Modem Card Rev F Simplex 4100 Fire Alarm

SIMPLEX 4100-6038 Dual RS232 Interface