以下是关于SNJ-603电子可逆计数器的产品中英文介绍：

SNJ-603电子可逆计数器是一款功能强大的工业级计数设备，其核心特点是具备加减可逆计数功能，能够根据运动方向自动进行加法或减法运算。该产品采用进口单片微处理器集成电路，配备红色LED数码管显示，显示位数为6位，可清晰呈现计数值。它还支持断电记忆功能，确保数据在断电后仍能长期保存。

在技术参数方面，SNJ-603具有6位显示容量（999999），计数频率分为低速30次/秒和高速5000次/秒两档。输入信号兼容双路光电或电平信号（5-30V），并提供DC12V/0.1A传感器供电输出。其工作温度范围为-10℃至+45℃，湿度≤85%RH，能够适应多种复杂的工作环境。

该计数器特别适用于既有前进又有倒退的计数场合，如绕制各种线圈、电线、电缆长度计量等。在实际应用中，它可广泛用于线圈加工、薄膜分切、仓储物流等领域，有效解决了传统计数器在倒退操作时需手动修正的痛点。用户可通过轻触按键直接设置初始值和参数，操作界面简洁直观。当计数达到预置值时，可自动触发继电器动作，实现设备启停或报警。

The SNJ-603 Reversible Electronic Counter is an industrial-grade counting device with a core feature of bidirectional counting. It can automatically perform addition or subtraction based on the direction of movement. Equipped with a single-chip microprocessor integrated circuit and a bright red LED display, the counter has a 6-digit display capacity, which can clearly show the counting results. Additionally, it supports non-volatile memory, ensuring that data is preserved even during power outages.

In terms of technical specifications, the SNJ-603 has a 6-digit capacity (999999) and offers dual-speed counting modes, with a low-speed setting of 30 times per second and a high-speed setting of 5000 times per second. It accepts dual-channel photoelectric or level input signals (5-30V) and provides a DC12V/0.1A sensor power output. The operating temperature range is from -10℃ to +45℃, with a humidity level of ≤85% RH, making it suitable for various complex working environments.

This counter is particularly suitable for counting applications involving both forward and backward movements, such as coil winding and cable length measurement. In practical applications, it is widely used in coil manufacturing, film slitting, and warehousing logistics, effectively solving the problem of manual correction required by traditional counters during reverse operations. Users can directly set initial values and parameters via tactile buttons, with an intuitive and user-friendly interface. When the count reaches the preset value, the relay action is automatically triggered, enabling equipment control, start/stop functions, or alarms.