Product Introduction

Single input, single output. RS-485 signal. Transmission delay ≤ 10 μ s, signal transmission rate ≤ 56kbps. Half duplex communication mode.

overview

This product can achieve bidirectional communication of RS-485 digital signals in hazardous and safe areas, and can also convert them into RS-232 digital signals for isolated transmission to safe areas. The product requires independent power supply, with input/output/power isolation. This product can be used on devices with RS-485 communication interface.

safety certification

Certificate No	GYB081022 (RS485 output)
	GYB081566 (RS232 output)
Explosion proof sign	[Exia] IIC (National Explosion proof Safety Supervision and Inspection Station Certification for Instruments and Meters)
Authentication parameters
Terminal	8-7
Maximum allowable voltage	Um=250V
voltage	Uo=7.71V
electric current	Io=82mA
power	Po=0.16W
capacitance	Co=9.3μF
inductance	Lo=4.5mH

Wiring diagram

RS485 output wiring diagram

RS232 output wiring diagram

Terminal number		Terminal Description
Safe Zone (Green)	1	RXD/B
	2	TXD/A
	3	GND
	5	POW（+）
	6	POW（-）
Dangerous Zone (Blue)	7	B
	8	A

Structural Outline Drawing

EVT: Work indicator light: When the instrument is working normally, the indicator light is green; When there is a fault alarm in the input signal, the indicator light is red.

35mm guide rail installation, please pay attention to stable and firm positioning during installation.

Please install it vertically as much as possible to facilitate heat dissipation inside the instrument.

Technical Parameter

power supply
Rated working voltage range	DC 24V±10%
power consumption	≤0.6W
Dangerous side
Input Signal Type	RS-485 half duplex digital signal
Safety side
Output signal type	RS-485 half duplex digital signal or RS-232 digital signal
RS-485 signal characteristics
Signal level rules	Standard RS-485 differential voltage level
transmission delay	≤10μs
Signal transmission rate	≤56kbps
RS-232 signal characteristics
Signal level rules	Standard RS-232 logic level
transmission delay	≤10μs
Signal transmission rate	≤56kbps
Insulation strength
Local security end and non local security end	2500V，a.c; 1min
environmental condition
ambient temperature	0～50℃
ambient humidity	5% to 95% RH (non condensing)
standard
Electromagnetic compatibility	Compliant with GB/T18268 Industrial Equipment Application Requirements

Instrument selection

Model example: NHR-A37-37-D1
485 input detection terminal isolation barrier, output signal is RS485 output.
Note: The 485 input detection terminal isolation barrier can only have one in and one out.