M-7059 offers 8 channels differential for AC digital input, each of which features photocouple isolation for channel to channel. Its on voltage level lies in 80 V ~ 250 VAC. All DI channels are also able to be used as 16-bit counters. M-7059D has 8 LED indicators for DI channel status. 4KV ESD protection and 4000V intra-module isolation are standard.