Page 45 of 68
Proton Products InteliSENS PD30 Instruction Manual (Issue 1a)
S
TANDARD
E
LECTRICAL
I
NTERFACES
S
PEED PULSE INPUT
The speed pulse input may be connected to a line speed gauge (such as a Proton Products SL or
SLR series non-contact laser speed and length gauge).
Measured line speed input is required for:
Helix mode operation.
PI feedback controller operation.
Statistical Process Control (SPC) operation.
Speed pulse input connection
The speed pulse input is fitted as standard and may be accessed through the “INTERFACE”
connector.
Connector type: DB25 female (socket)
Pin Designation Description
Notes
11
DGND
Digital ground
Ground reference for SPD1 and SPD2.
12
SPD2
Speed pulse input 2
For low voltage speed pulses (e.g. 5V TTL).
13
SPD1
Speed pulse input 1
For high voltage speed pulses
(e.g. 12 ~ 24V speed encoders).
S
Shield
Ensure that the cable shield is connected to this via the
plug shield connection.
Speed pulse input electrical specification
A choice of two speed pulse inputs are available: one input is for high voltage pulses and one
input is for low voltage pulses; only one input should be selected for use.
The ground reference (GND) for the speed pulse inputs is not isolated from earth.
Specification
Min
Typ
Max
Units
SPD1 (pin13)
High voltage
(e.g. 12 ~ 24V speed encoders)
Low state (logic 0) input voltage
+5
V
High state (logic 1) input voltage
+9
V
Absolute input voltage
-50
+50
V
SPD2 (pin 12)
Low voltage
(e.g. 5V TTL)
Low state (logic 0) input voltage
+2
V
High state (logic 1) input voltage
+4
V
Absolute input voltage
-30
+30
V
Pulse frequency
250
kHz
