Watlow SDAC Bedienungsanleitung PDF herunterladen (Seite 4)

4 WATLOW SDAC User’s Guide

Table 2. Physical Specifications

Table 3. Agency Approvals / Compliance

Inputs

The Serial DAC requires a proprietary serial data sig-

nal and the clock signal from the controller. The Serial

DAC also requires a 5VÎ (dc) power input.

Table 4. Screw Terminals

Table 5. Serial DAC Inputs

Table 6. Power Requirements

Analog Outputs

Table 7. Output Specifications

Parameter Description

Absolute Maximum

Common Mode

Voltage

Measured between output pins and con-

troller common: 1,000V

Resolution 15 bits (plus polarity bit for voltage outputs)

(0.305 mV for 10V output range)

(0.00061 mA for 20 mA output range)

Accuracy (calibrated

for voltage output)

For voltage output: +/- 0.005V (0.05% at

full scale)

For current output: +/ 0.1 mA (0.5% at full

scale)

Temperature coeffi-

cient

440 ppm/°C typical

Isolation Breakdown

Voltage

1000V between input power and signals

Current 0 to 20 mA with 10V minimum compliance

(500 ohm load)

Voltage 0 to 10V

(dc) with 10 mA source

capability

Output Response

Time

1 ms typical

Update Rate Once per controller A/D cycle nominal.

Twice per second maximum for 60 Hz clock

rate.

Output changes are step changes due to

the fast time constant. All Serial DAC loop

outputs are updated at the same time.

Parameter Description

Voltage

4.75 to 5.25VÎ (dc) @ 300 mA maximum

Parameter Description

Data

4 mA maximum to DC COM

Open collector or HC CMOS logic levels

Clock

0.5 mA maximum to DC COM

Open collector or HC CMOS logic levels

Wire Gauge 24 to 12 AWG

Screw Terminal Torque

0.5 to 0.6 Nm (4.5 to 5.4

inch-pound)

CE Directive Electromagnetic Compatibility (EMC)

directive 89/336/EEC

UL® and C-UL® UL916, Standard for Energy

Management Equipment, File E177240

Weight 0.34 kg 0.76 lb

Length 138 mm 5.5 in

Width 91 mm 3.6 in

Height 44 mm 1.8 in

1 2 3 4

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