L1 N RxD GND TxD GND Rx+ Rx- Tx+ Tx- CL+ CL- MAINS V 50/60 Hz CONFIGURATION INTERFACE RS-232 COMMUNICATION INTERFACE ANT RS mA 85 – 264 Vac Power Supply GSM µP DTE Interface PWR GSM TxD RxD CTS DTR DCD RI Watch DOG WatchDog “tick” LED GSM GPRS Module 4 I/O C
INTERFACE + POWER SUPPLY board PROCESSOR board PSTN / ISDN / GSM board DTE-CL AUX I/O DTE RS N L A B PS- lowPS- highLine
DTE-CL RxD mA V TxD R
1 3 RxD mA V TxD R loop
jumper placed NO jumper n/a PWR GSM TxD RxD CTS DTR DCD RI J1 J2 JP6 JP5 JP2 JP1 J4 J5 X X X X X X X X X X X J4 J5 24 hour J4 J5 6 hour J4 J5 12 hour J4 J5 1 hour
L1 N MAINS V 50/60 Hz CONFIGURATION INTERFACE RS-232 RxD GND TxD GND COMMUNICATION INTERFACE ANT I/O L1 N MAINS V 50/60 Hz CONFIGURATION INTERFACE RS-232 RxD GND TxD GND COMMUNICATION INTERFACE PSTN or ISDN I/O