Proton InteliSENS PD30, Instruction Manual

Page: 47 / 68

Page 47 of 68
Proton Products InteliSENS PD30 Instruction Manual (Issue 1a)
L
OGIC
I
NPUTS
Logic inputs connection
Two logic inputs are fitted as standard and may
be accessed through the “INTERFACE” connector.
Connector type: DB25 female (socket)
Pin Designation Description Notes
10 LIN2 Logic input 2
11 DGND Digital ground Ground reference for LIN1 and LIN2.
23 LIN1 Logic input 1
S Shield
Ensure that the cable shield is connected to this via the plug
shield connection.
Logic inputs electrical specification

Logic inputs are not isolated from earth.

Inputs are internally pulled up to +15 V
via 5.1kΩ resistors; unconnected inputs default to the high
state.

Inputs will source a minimum current of 3mA when externally pulled down to the low state.
Specification Minimum Typical Maximum Units
Low state (logic 0) input voltage 3 V
High state (logic 1) input voltage 10.5 V
Absolute input voltage -30 30 V
Low state source current 3 mA
Logic inputs can be connected to different types of signal sources as follows:
Signal source Connection method
Mechanical or solid
state relay contact
Connect between logic input and DGND (pin 11).
Pull-down Connect the pull-down signal to the logic input and ground to DGND (pin 11).
Pull-up

Connect an 820
Ω resistor between the logic input and DGND (pin 11) to pull
the input down to 2.5V.

Connect the pull-up signal source to the logic input and ground to DGND
(pin 11).

For 24V signals (such as from a PLC), the power dissipation in the 820
Ω
resistor can be reduced by connecting another 820
Ω in series between the
pull-up signal source and logic input.