Digital Inputs, Inputs And Outputs | Cooper Bussmann BU-905U-L

Cooper Bussmann BU-905U-L Wireless I/O Installation Manual

The units have the following inputs and outputs:
Input/Output	BU-905U-L-T	BU-905U-L-R	Description	For more information, see …
Digital inputs	2		Suitable for Voltage free contact,	Digital inputs on page 15.
			NPN transistor, 0-5V signal.
Relay outputs		3	250Vac 1A / 30Vdc 1A.	Relay outputs Important
				Information on page 17.
Status outputs	2	2	Max 30Vdc, 500mA. Indicate module status,	Status outputs on page 18.
			communication failure and local setpoint status.

Analog inputs	1	4-20mA with over-range and under-range.
		0-10mA with over-range.

Analog input on page 18.

+24V Loop supply	1	Provides power for 1 external current loop	Installing the power supply
		(up to 35mA).	on page 14.
Analog setpoint	1	Allows discrete setpoint to be controlled from	Refer to the User Manual.
		analog input. Threshold adjustable via
		rotary switch.
Thermocouple /	1	Provides measurement of E, J, K, T type	Thermocouple input
millivolt input		Thermocouple, millivolt signals and user-defined	on page 20.
		thermocouple types.

Thermocouple	1	Lets you control discrete setpoint from
Setpoint		thermocouple with threshold adjustable via
		rotary switch.

Refer to the User Manual.

Pulse inputs	2
Analog Output	1

For more information, see the next sections.

Up to 10Hz.	Pulse input on page 21.
0-22mA, suitable for loop powered, floating	Analog output
input or single-ended input device.	on page 22.

Digital Inputs

The BU-905U-L-T module provides two digital inputs suitable for:

•Voltage free contacts – e.g., mechanical switches; or

•NPN Transistor devices – e.g., electronic proximity switches; or

•0-5V Signals - 2V – 4V Minimum range.

Note: PNP Transistor devices are not suitable.

3A1580Rev1.6