Weidmuller WI-I/O-EX: Wireless I/O Expansion Modules v1.11 - Manual (Page 12)

WI-I/O-EX Serial I/O Module User Manual v1.11
Page 12 February 2010
2.2 Signal Connections
All connections to the module should be SELV only. Normal 110/220/240V mains
supply should not be connected to any input terminal of the module.
2.2.1 Digital Inputs (and Pulsed Inputs)
The WI-I/O-EX-1-S-11 supports 16 digital signals, and the WI-I/O-EX-1-S-12 and WI-
I/O-EX-1-S-13 support 8 digital signals. Additionally, digital inputs DIO1-4 on the WI-
I/O-EX-1-S-11 operate as pulse inputs.
Digital output signals share the same terminals as the Digital input signals, marked DIO1-
8, and DIO1-16 on the WI-I/O-EX-1-S-11 module.
A digital input is activated by connecting to EARTH, either by voltage-free contact or by
a transistor switch. Refer to Figure 2-5:
Figure 2-5: Connection of digital inputs.
Voltage-free contact
Transistor
switch device
V+
V+
V-
DIO1
DIO2
EARTH
WI-I/O-EX Module