User`s manual
IPL T SF Series • Communication and Control
4-5
Analog input
When a ex I/O port is congured as an analog input, the port
can measure 0 to 25.3 VDC with 12 bit accuracy. A DC level is
indicated by a count from 0-4096 (≈ 6 mv/count).
Figure 4-6 — Sample of an analog input for a level
adjustment, using a 10K pot
Bidirectional serial control interface ports
The IP Link
®
family of products has several models that
incorporate bidirectional serial control ports. The serial ports
allow for control of a wide variety of existing Extron and third-
party devices. The most common serial control formats are
RS-232, RS-422, and RS-485. Within the IPL T SF products, there
are two different implementations for the serial control ports:
the 9-pin D connector and the captive screw connector.
9-pin D Connectors — On some IPL T SF units, serial control
is accessed through a 9-pin D connector. In this
conguration, all three control formats are available and
fully software congurable. By selecting the
RS-232 format, hardware handshaking (RTS, CTS) is also
available. The RS-232 connection uses the same industry
standard interface pin-out as found on standard PCs. If
selecting either RS-422 or RS-485 formats, verify proper
wiring as detailed in gure 2-8. These two formats do
not have an industry standard pin-out and will vary from
device to device.
Captive Screw Connectors — On other IPL T SF units, several
of the serial interface ports are connected on captive
screw terminals. When using the ports on the captive
screw terminals, only RS-232 control is available, and
hardware handshaking is unavailable. Since RS-232 is
the most common control interface encountered, this port
conguration allows for quick termination.
10
+30V
+12V
GND
24K
10K
I/O