Yudian AI Series Operating Instructions

6
4. MODE indication light:
When the instrument is communicating with the host computer, the light will keep flashing in
random speed.
When the instrument hasn’t received signal from the host computer more than 6 seconds, the
indication light should flicker with the same light on time and light off time.
It means:
The on-off period is as long as 1.6 second means no communication and no alarm (it can be
treated as normal);
The light flashing with period 0.6 second means no communication and some general error
occurs.
The light quickly flashing with period 0.3 second means no communication and severe error
such as input over range occurs.
The light keeping off means the instrument power off or damaged; the light keep on (longer
than 8 seconds) means the instrument power on but damaged.

Yudian AI Series Specifications

General

Control Mode	On/Off
Input Type	Thermocouple (K, S, T, E, J, B, N), RTD (Pt100, Cu50), Linear Current (4-20mA), Linear Voltage (0-5V, 1-5V)
Output Type	Relay, SSR, Linear Current (4-20mA)
Power Supply	AC 90-260V, 50/60Hz or DC 24V
Communication	RS485 Modbus RTU
Accuracy	±0.2%FS
Operating Temperature	0-50°C
Storage Temperature	-20-60°C
Humidity	85% RH (non-condensing)
Protection	IP65 (Front Panel)