... reverse protection;DIP-chip to ensure more reliable communication, RS485 reverse protection, anti-static protection;Hardware watchdog to avoid ... ;50Pin extended interface, to the height of 128 points;RS232 and RS485 communication without the jumper, and also supports GSM / GPRS ... of 1/16, 1/8, 1/4, static routingControl card with search function , the screen parameter setting, scan settings, read ...