Watlow Electric Series D8 Switch User Manual


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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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