Item Type: Programmable Logic Controller_x000D_ Product Model: SK222XP 14R_x000D_ Digital Input: 8 Channels_x000D_ Digital Output: 6 Way Relay_x000D_ Battery: 1 x CR1220 40mAh, with built in battery. _x000D_ Analog Input: 2 channels, 0~10V or 0~20mA, input switchable. _x000D_ Analog Output: 1 channel, 0~10V or 0~20mA. _x000D_ 485 Interface: 1 Channel_x000D_ High Speed Pulse Input: 6 x 30K_x000D_ High Speed Pulse Output: Not Supported_x000D_ Expansion: Not expandable. _x000D_ Power Supply: 24V DC_x000D_ Note: Supports voltage and current analog input, switch through dip switch. _x000D_ Compatibility: Fully compatible with S7 programming software and instruction set. _x000D_ Resourceful: 8 digital inputs, 6 digital outputs, 2 analog proposed inputs with built in dip switches to set voltage or current input, 1 analog output with both voltage and current output. _x000D_ Bidirectional Input: Digital input port adopts bidirectional optocoupler internally, supporting NPN or PNP input. _x000D_ High Accuracy: The analog input adopts high accuracy AD and rail to rail op amp, which can realize low voltage recognition._x000D_ Full Communication Port: 1 way PPI communication interface, supporting 9.6k, 19.2k and 187.5kbps baud rate. _x000D_ Free Port Baud Rate: 1.2k-115.2kbps_x000D_ Protocol: Supports PPI protocol, free port protocol, USS protocol. _x000D_ Perfect Clock: Built in clock battery, double loop power supply design, support perpetual calendar standby use for more than 2 years. _x000D_ Reliable Encryption: Unbreakable after encryption, complete protection on your program. _x000D_ Power Down Retention: Using for FLASH technology, no need for battery support, permanent storage. _x000D_ Comprehensive Protection: Power supply anti reverse connection design, communication port electrostatic protection design, analog anti short circuit protection. _x000D_ Support PID: Support PID command, which can facilitate users to realize multi path PID control. _x000D_ Independent Power Supply: Power supply board with good materials and sufficient power to meet multiple expansion and sensor power supply. _x000D_ Strong Anti Interference Ability: After strict industrial field test and environmental test. _x000D_ High Speed Pulse Output: Transistor model products, supporting 100K high speed pulse output. _x000D_ Compatibility: For S7 200 CPU222XP