二维键盘
★ RS485控制总线，最多可控255个快球，最大并联128个设备                                            ★ 通讯端口均为防雷设计，抗干扰能力强，标准传输距离1200米                                       ★ 级联端口上最大可连接15台副控键盘                                                                                   ★ 通讯兼容性好，内置多种协议                                                                                              ★键盘操作密码开关锁功能                                                                                                        ★LCD液晶屏显示                                                                                                                        供应电源：DC12V±10%/50HZ                                                                                                   环境温度：-10～55℃　    环境湿度：≤９０％RH(无霜结)                                                   通讯方式：RS485　           通讯波特率：1200、2400、4800、9600、19200                        接口方式：5PIN压线端子显示方式LCD液晶显示屏     外观尺寸：305(L)×148(W)×82(H)毫米