Black Box是一家全球数字基础设施集成商，为美国、欧洲、印度、亚太、中东和拉丁美洲的企业提供网络和系统集成服务
和解决方案、支持服务和技术产品，在全球拥有约4000名专业人员。
Black Box在网络集成、数字连接基础设施、数据中心扩建、现代工作场所和网络安全方面为各行各业的企业提供强大的服务，
包括金融服务、技术、医疗保健、零售、机场等公共服务；制造业和其他行业。
产品介绍：
LES400 Series Industrial Serial Device Server - 1-Port
Remote access to serial devices across your LAN/WAN.
Item #: LES421A
Industrial Serial Device Server - 1-Port
Access a single serial device over your Ethernet network. Software selectable for RS-232, RS-422, or RS-485.
Software selectable for RS-232, RS-422, or RS-485.
Operating Temperature -40 to +176° F (-40 to 80° C).
Autosensing 10-/100-Mbps Ethernet port.
Completely manageable through any Web browser.
Easily integrates a serial device into your Ethernet network.
Enables you to monitor a serial industrial device from your office.
Configure a device, troubleshoot, upgrade firmware, and more.
Rugged design for operation in a wide temperature range.
NEMA TS-2 rated for use in transportation applications.
Offers direct IP, virtual COM port, or paired modes of operation.
Features a DB9 port and terminal block for serial connections.
Equipped with a 10-/100-Mbps port for LAN/WAN connectivity.
Built-in Web server for browser-based management.
Includes easy-to-use configuration software.
Boasts high throughput with low latency.
Slim IP30 enclosure saves on DIN rail space.
