DAC and SDAC Modules

Figure 1 - Front View

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.

50mm (2.0 in.)

96 mm (3.8 in.)

Figure 2 - Side View

188 mm (7.4 in.)

 

 

Address

 

Data Rate

 

2

4

2

500 Kb

PGM

 

 

4

250 Kb

 

0

 

0

 

125 Kb

 

66

P8

MSD LSD

41 mm to 53 mm

(1.6 in. to 2.1 in.) for cables and clearance

25mm (1.0 in.)

Figure 3 - D8 with TB18 Option for Digital I/O

Figure 4 - D8 with SCSI/TB50 Option for Digital I/O

TB50 terminal board option: digital I/O connects here

Connect digital I/O

SCSI cable

here with TB18 option