Watlow CPC400 - Manual (Page 55)

CPC400 Series User’s Guide Chapter 2: Installation
Doc. 0600-2900-2000 Watlow Anafaze 41
Figure 2.29 Single/Multiple Serial DACs
Serial Communications
The CPC400 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 the Hardware Communica-
tions Protocol on page 157.
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 m).
The EIA/TIA-232 interface is a standard three-wire inter-
face. Table 2.7 shows EIA/TIA-232 connections for 25-pin
and 9-pin connectors or cables that are supplied by the fac-
tory.
EIA/TIA-232 may be used to connect a computer through a
232-to-485 converter to an EIA/TIA-485 communications
network with up to 32 CPC400 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
+5 V
5 V Common
15 V Common
Controller
Power Supply