Watlow Electric D8 User Manual
SERIES D8
The Watlow SERIES D8 is a powerful line of controllers that
combines performance and flexibility with compact design.
Compliance with the
Open DeviceNet™ Vendors Association
(
ODVA) and Semiconductor Special Interest Group (SIG)
standards means this controller is easy to integrate into
systems with DeviceNet™ networks on Controller Area
Network (CAN).
The four and eight loop versions of SERIES D8 controllers
provide complete control solutions for a broad range of
applications. Support for multiple types of sensor inputs
including thermocouples, RTDs, linear voltage and current
is also available.
Each loop can be individually configured for on-off control or
PID control. Loops can also be combined to achieve cascade,
ratio or differential control. Process variable retransmit and
remote analog set point are included.
The SERIES D8 controllers are UL
®
and C-UL®listed, meet
the requirements of the European Community EMC Directive
and carry the CE mark.
Full Featured
Controller in a
1
⁄8 DIN Package
with DeviceNet™
Features and Benefits
PID control of up to eight loops
• Minimizes panel space per loop
• Reduces installation time
• Increases reliability, fewer parts mean fewer failures
Complies with ODVA and Semiconductor SIG
specifications for DeviceNet™ on CAN
• Integrates with other DeviceNet™ nodes and software
• Provides sealed micro connector for minimal installation
time and footprint and maximum reliability
• Simplifies setup with rotary switches for baud rate and
node address
• Simplifies commissioning and troubleshooting a network
with network and module status LEDs
Menu-guided operation with full text prompts
• Allows quick setup of the controller
• Simplifies operation
Context-sensitive, on-screen help
• Saves time
• Reduces learning curve
Advanced control utilities
• Auto-tune optimizes control with minimal effort and
expertise
• Cascade minimizes overshoot and improves control in
systems with excessive thermal lag
• Ratio and differential enhance control in areas where the
relationship between two or more loops is paramount
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DeviceNet™ is a trademark of the Open DeviceNet Vendors
Association
UL
®
and C-UL®are registered trademark of Underwriter's
Laboratories, Inc.
1241 Bundy Boulevard
Winona, Minnesota 55987-5580 USA
Phone: +1 (507) 454-5300
Fax: +1 (507) 452-4507
Internet: www.watlow.com
E-mail: info@watlow.com
WIN-D8-0307
DAC and SDAC Modules
The optional DAC and SDAC modules are available for
Watlow SERIES D8 controllers.
DAC
The DAC (digital to analog converter) converts one or two
of the controller’s distributed zero crossing (DZC) output
signals to analog signals. Each output is field configurable
for 4-20mAÎ(dc), 0-5VÎ(dc), or 0-10VÎ(dc).
SDAC
The SDAC (serial digital to analog converter) converts
one controller output to a precise analog voltage or
current signal. The unit is typically used for process variable
retransmit, open-loop, motor or belt speed control,
or phase-angle fired SCR power controllers. The SDAC
bears the CE mark and is UL
®
and C-UL®listed.
Because the SERIES D8 has no onboard analog outputs,
applications that use process variable retransmit typically
require one SDAC module per retransmitted signal.
Address
Data Rate
MSD
LSD
2
6
4
0
P
2
6
4
0
8
PGM
500 Kb
250 Kb
125 Kb
25 mm
(1.0 in.)
41 mm to 53 mm
(1.6 in. to 2.1 in.) for cables
and clearance
188 mm (7.4 in.)
Figure 1 - Front View
Figure 2 - Side View
96 mm (3.8 in.)
50 mm
(2.0 in.)
Figure 3 - D8 with TB18 Option for Digital I/O
Figure 4 - D8 with SCSI/TB50 Option for Digital I/O
Connect digital I/O
here with TB18 option
SCSI cable
TB50 terminal board
option: digital I/O
connects here
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