in
tele
Smart2 Instruction Manual
June 2016
Page 20 of 49
To set the analog input for 0-20mA/4-20mA, jumper J17 needs to be set to jumper positions 2 and 3. To
set the analog input for 0-5VDC/0-10VDC, jumper J17 needs to be set to jumper positions 1 and 2.
4.9 DIGITAL
INPUTS
The in
tele
Smart2 contains five digital inputs that can be used to interface with a digital device, such as a
limit switch. There is also a reference input for each of the digital inputs. Typically the reference input is
the ground reference from the device that the digital signal is coming from. The digital inputs can support
either low voltage (3-36VDC) or high voltage (24-250VAC/VDC) inputs. To properly handle the low or
high voltage input, a jumper needs to be moved. To enable high voltage input, the jumper needs to short
jumper positions 2 and 3. To enable low voltage input, the jumper needs to short jumper positions 1 and
2. Table 3 shows the connections for each of the digital inputs and the jumper associated with changing
between low and high voltage.
Input
Number
Digital
Input
Connection
Digital
Input
Reference
Connection
Low/High
Voltage
Jumper
1 J16-9 J16-10 J18
2 J16-7 J16-8 J19
3 J16-5 J16-6 J20
4 J16-3 J16-4 J21
5 J16-1 J16-2 J22
Table 3. Digital Input Connection Reference
4.10 EXPANSION MODULES
The in
tele
Smart2 has the ability to have up to two expansion modules connected. Expansion modules
provide the ability to increase the capabilities of the receiver. For more information regarding expansion
modules, including their wiring diagrams, refer to Section 6.
