Watlow CLS200 - Manual (Page 61)

CLS200 Series User’s Guide Chapter 2: Installation
Doc.# 0600-3050-2000 Watlow Anafaze 45
Figure 2.30 Single/Multiple Serial DACs
Serial Communications
The CLS200 series controllers are factory-configured for
EIA/TIA-232 communications unless otherwise specified
when purchased. However, the communications are jump-
er-selectable, so you can switch between EIA/TIA-232 and
EIA/TIA-485. See Changing Communications on page 179.
EIA/TIA-232 Interface
EIA/TIA-232 provides communication to the serial port of
an IBM PC or compatible computer. It is used for single-
controller installations where the cable length does not ex-
ceed 50 feet (15.2 m).
The EIA/TIA-232 interface is a standard three-wire inter-
face. See the table below for connection information.
If you are using EIA/TIA-232 communications with
grounded thermocouples, use an optical isolator between
the controller and the computer to prevent ground loops.
Table 2.8 shows EIA/TIA-232 connections for 25-pin and 9-
pin connectors or cables that are supplied by the factory.
EIA/TIA-232 may be used to connect a computer through a
232/485 converter, to an EIA/TIA-485 communications net-
work with up to 32 CLS200 controllers.
Daisy chain up to
16 Serial DACs
TB50 or TB18
+5V In 1
2
3
4
5
6
COM In
CLK In
Data In
+ Out
- Out
Serial DAC
Load
Serial DAC Clock
-
+
Control Output
+5V
5V Common
15V Common
Controller
Power Supply