750-00004 Parallax Inc, 750-00004 Datasheet - Page 4

• Manufacturer Part Number: 750-00004
• Description: POWER SUPPLY 24VDC 600MA
• Manufacturer: Parallax Inc

Specifications of 750-00004

• Form: Wall Mount (2 Prong)
• Voltage - Output Per Connector: 24VDC
• Current - Output: 600mA
• Polarization: Positive Center
• Cord Plug: 2.1mm I.D. x 5.5mm O.D. x 12mm Female
• Voltage - Input: 120VAC
• Power - Output: 14W
• Transformer Type: Linear, Unregulated
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Efficiency: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

For each analog signal you wish to read that is a 4-20mA current loop you will need to install a shunt at
this time. The shunt locations correspond to the analog channels they are adjacent to. Figure 4 shows
the locations of the shunts relative to the MAX1270 A/D converter IC. It also shows the shunt for analog
input channel 1 installed properly.
Programming Port Connection
Connections Sout, Sin, ATN, and GND are for the serial port. This diagram depicts exactly how to wire
these connections to a standard DB9 PC serial port. Please note the jumper wire connecting pin-6 to pin-
7 on the DB9 is not necessary providing that you use BASIC Stamp Editor software version 1.2 (or later).
Parallax, Inc. • Stamp PLC (#30064) • Version 1.8 • 12/29/2003
Figure 5: Stamp PLC with Serial Port and Power Connected
DB9 Male
Figure 4: Oblique view of the 4-20mA Shunt Locations
24VDC
Vss
8
9
7
6
1
2
3
4
5
+
Figure 6: Serial Port Cable Detail
S
S
ATN
GND
D 1
D 2
D 3
D 4
D 5
D 6
D 7
D 8
D 9
D 10
D GND
+24 VDC
GND
OUT
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
www.parallax.com
#30064
OUT 5VDC
D
OUT
D
A GND
A GND
D
D
D
D
D
D
D
D
IN
IN
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
A 1
A 2
A 3
A 4
GND
IN
IN
IN
IN
V+
1
2
3
4
5
6
7
8
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