== 3A Relay Output Module (WBIO-DO-R3A-8) ==

WBIO-DO-R3A-8

Purpose

Control of contactors, warning lights, etc.

Technical specifications

Contains 8 relays. Two of them are rocker (NO/COM/NC) switching corresponding 8 outputs. The outputs are output to screw clamps designed for a maximum current of 20 A.

Permissible current: up to 3A per channel.

Our detailed article in russian on habr.com about the choice of relay parameters for the switched load: https://habr.com/ru/company/wirenboard/blog/422197/

Parameter	Value
Number of outputs	8
Output type	mechanical relay
contact Configuration	K2-K7	SPST, normally open states: off C is closed and NO
	K1, K8	SPDT (contacts K, NO, NC) conditions: C and NS closed C and NO closed
Maximum switching voltage, alternating current	250 V
Maximum switching voltage, direct current	30 V
Maximum switching current, per channel (*)	3 A
The channel resistance in the open state	< 100 megohms
Voltage isolation between the controller and the output	1500 V (RMS.)
Lifetime: number of switches for 10 A 230 V AC load, cos φ = 1	100 000
Module type	"O" (non-inverted address scheme)
Maximum power consumption	1W
Width, DIN units	3
Size	53,3x90,2x57,5 mm

*) Maximum switching current is specified for 230 VAC resistive load.

Dimensions

Connection to the controller

See Activating the modules in the web interface of the controller. In the Module type field, select WBIO-DO-RxA-8: 8 Channel Relay I/O module. In the web interface the relay will be presented by the controls of EXTx_R3A1 — EXTx_R3A8 of the Discrete I/O devices. The corresponding MQTT-topics: /devices/wb-gpio/controls/EXTx_R3Ay.

Controls of the module in the web interface

Load connection

Relays are connected in a phase break.

Connection scheme