PPC-2000 User’s Guide
Chapter 2: Hardware Installation
Doc.# 30002-00 Rev 2.3
Watlow Anafaze
43
Using the CPU Watchdog Signal
The PPC system constantly monitors the functioning of its
microprocessor. The CPU watchdog output is Low (on) when
the microprocessor is operating; when it stops operating, the
output goes High (off). This sink output is available on screw
terminal #48 on the TB50 attached to the PPC-2010 Processor
module.
The figure below shows the recommended circuit for the CPU
Watchdog signal output.
Figure 2.26 Recommended circuitry for CPU
Watchdog
SDAC Connections
Up to 5 Serial Digital to Analog Converter (SDAC) modules can
be connected to digital outputs on the processor module. Each
can provide an analog current or voltage signal.
Single SDAC Systems
Use the
+5V
output on the PPC-IPS-2 to power SDACs. Use
stranded 18 to 22 gauge wire for most installations. Refer to
for system setup.
•
Connect SDAC Pin 1 to the
+5V
terminal on the power
supply.
•
Connect SDAC Pin 2 to the
DC COM
terminal on the
power supply.
•
If a separate power supply is used, connect the common to
the
DC COM
on the PPC-2000 power supply.
•
Connect SDAC Pin 3 to the SDAC clock output on the
processor’s TB50 (digital output
46
).
•
Connect SDAC pin 4 to the desired control output on the
TB50 (digital output
41-45
).
•
Connect SDAC pins 5 and 6 to the input of the controlled
device.
SSR
+ 5Vdc
CPU
(pin 48)
PPC-IPS-2
+
-
Monitoring or
Interlocking
Device
Watchdog
TB50
Summary of Contents for Anafaze PPC-2000
Page 2: ......
Page 14: ...Table of Contents PPC 2000 User s Guide viii Watlow Anafaze Doc 30002 00 Rev 2 3...
Page 24: ...List of Tables PPC User s Guide xviii Watlow Anafaze Doc 30002 00 Rev 2 3...
Page 36: ...Chapter 1 Overview PPC 2000 User s Guide 12 Watlow Anafaze Doc 30002 00 Rev 2 3...
Page 112: ...Chapter 2 Hardware Installation PPC 2000 User s Guide 88 Watlow Anafaze Doc 30002 00 Rev 2 3...
Page 184: ...Chapter 4 Troubleshooting PPC 2000 User s Guide 158 Watlow Anafaze Doc 30002 00 Rev 2 3...
Page 296: ...Chapter 7 Specifications PPC 2000 User s Guide 268 Watlow Anafaze Doc 30002 00 Rev 2 3...
Page 310: ...Appendix A Modbus Protocol PPC 2000 User s Guide 282 Watlow Anafaze Doc 30002 00 Rev 2 3...
Page 311: ...Doc 30002 00 Rev 2 3 Watlow Anafaze 283 B Appendix B Declaration of Conformity...
Page 319: ...PPC 2000 User s Guide Glossary Doc 30002 00 Rev 2 3 Watlow Anafaze 291...
Page 320: ...Glossary PPC 2000 User s Guide 292 Watlow Anafaze Doc 30002 00 Rev 2 3...