ProtEX PD8-6080/PD8-6081 Explosion-Proof Modbus
®
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23
Digital I/O Connections
The ProtEX-MAX has a 10 position terminal block for connecting digital inputs and outputs.
Figure 18: Digital I/O Connections
NOTICE
The onboard digital inputs (1-4) are configured at the factory to function
identically to the front panel pushbuttons (Menu, F1, F2, & F3) in order to
work with the SafeTouch buttons. Changing the programming of the digital
inputs will affect the function of the SafeTouch buttons.
If you wish to change the behavior of the digital inputs, re-assign F1-F3 to
the desired function, then change the corresponding digital input to match.
WARNING
Observe all safety regulations. Electrical wiring should be performed in
accordance with all agency requirements and applicable national, state,
and local codes to prevent damage to the meter and ensure personnel
safety.
External Switch Contacts
The ProtEX-MAX includes 4 digital inputs. These digital inputs are preconfigured at the factory to function
as external contacts to duplicate the front button functions of the instrument. The factory configuration
uses the following corresponding digital input terminals for external switch contacts.
Digital
Input
Connection
Factory Default
Function
I1
MENU
I2
RIGHT arrow
I3
UP arrow
I4
ENTER arrow
See Digital Inputs & Outputs in the Specification on page 9 for details on the digital inputs.
NOTICE
The digital inputs are configured at the factory to function
identically to the front panel pushbuttons in order to work with
the SafeTouch buttons. Changing the programming of the
digital inputs will affect the function of the SafeTouch buttons.
1
2
3
4
5
6
+5
I1
I2
I3
I4
O1
7
8
O2
O3
9
10
O4
G
DI 1-4
DO 1-4
5 VDC
GND
!
!
