Bimba STP-10 - Manual (Page 21)

STP-10 Hardware Manual
21
Other Digital Inputs
As we mentioned in the previous section, the high speed STEP and DIR inputs
are configured for five volt logic. All other digital inputs are designed for opera-
tion between 12 and 24 volts DC.
Single Ended Inputs
The STP drives include four single ended, optically isolated input circuits that
can be used with sourcing or sinking signals, 12 to 24 volts. This allows con-
nection to PLCs, sensors, relays and mechanical switches. Because the input
circuits are isolated, they require a source of power. If you are connecting to a
PLC, you should be able to get power from the PLC power supply. If you are
using relays or mechanical switches, you will need a 12-24 V power supply.
What is COM?
“Common” is an electronics term for an electrical connection to a common
voltage. Sometimes “common” means the same thing as “ground”, but not
always. In the case of the STP drives, if you are using sourcing (PNP) input
signals, then you will want to connect COM to ground (power supply -). If you
are using sinking (NPN) signals, then COM must connect to power supply +.
Note: If current is flowing into or out of an input, the logic state of that input is low or closed. If no current is flowing, or the input
is not connected, the logic state is high or open.
The diagrams below and on the following page show how to connect the inputs to various commonly used devices.
2200
2200
2200
2200
2200
inside drive
XCOM
X3/EN
X4/RST
X5
X6
X8/CCWLIM-
8
7
6
5
4
25
X8/CCWLIM+
24
2200
X7/CWLIM-
23
X7/CWLIM+
22
DB-25 Connector
Connecting another IQ drive to the STP
(When output closes, input goes low).
IN/OUT1
X3..X6
XCOM
DRIVE
OUT+
OUT–
12-24
VDC
Power
Supply
-
+
Connecting an Input to a Switch or Relay
DRIVE
switch or relay
(closed=logic low)
X3..X6
XCOM
12-24
VDC
Power
Supply
-
+