User manual

Chapter One Introduction
man_905-105_2.9 Page 9
905U modules. 105S modules may be used for serial I/O applications, or as I/O expansion for
905U modules.
• The 905U-C module provides an interface between host devices such as PLC’s or SCADA
computers, and a wireless I/O system comprising 905U modules. The 905U-C allows 905U
modules to act as remote wireless I/O for the host devices. For more information, refer to the 905U-
C User Manual.
I/O Types
905U-1 105S-1 905U-2 105S-2 905U-3 105S-3 905U-4 105S-4
Radio
!!!!
Serial
!!!!!!!!
Digital
Inputs (DI)
4 4 4 to 16
Digital
Outputs (DO)
4 (relay) 1 (FET) 8 (FET) 4 to 16 (FET)
Analog
Inputs (AI)
2 (4-20mA) 6 (0-20mA)
Analog
Outputs (AO)
2 (4-20mA) 8 (0-20mA)
Pulse Inputs
(PI)
1 (100Hz) 4 (1x1KHz,
3x100Hz)
4 (1x1KHz,
3x100Hz)
Pulse
Outputs (PO)
1 (100Hz) 4 (100 Hz) 4 (100 Hz)
Comments
PI is DI 1. PO is
separate to DO.
PI’s are the same
as DI’s.
PO’s are the same
as DO’s .
PI/ PO’s are the
same as DI/ DO’s.
Note regarding -4 modules. The 905U/105S-4 has a total of 20 digital I/O. Four are fixed inputs (also
PI’s) and four are fixed outputs (also PO’s). The other 12 are selectable individually as DI or DO. The
I/O range can vary from 16DI + 4DO to 4DI + 16DO or any combination in between.
All modules include power supply, microprocessor controller, input/output circuits, RS485/232 serial
port, and a radio transceiver - no external electronics are required. The 905U version has both radio
and serial port communications. The 105S version does not have a radio and has only serial
communications. The 905U radio has been designed to meet the requirements of unlicensed operation
for remote monitoring and control of equipment. That is, a radio licence is not required for the 905U
modules in many countries. See Chapter Five Specifications for details.