Analog Current Input Modules
FEATURES
• Wide Variety of Input Ranges
• Standard Package and Pin-out
• Single 5V Power Supply
• 12-Bit Resolution
• Optical Isolation from Input to
Output
• Intermix With Digital Modules on
the Same Rack
• Meets the Requirements of IEEE
472
• UL, CSA, CE Certified (OpenLine only)
73L-II
73G-II
CIRCUITRY: Voltage Output
G5: 0-5A
1
CURRENT
SOURCE
5A SECONDARY
TRANSFORMER
RECTIFY,
FILTER,
AMPLIFY
VOLTAGE
CONTROLLED
OSCILLATOR
G5: 4-20mA
+
1
˜
CURRENT
SOURCE
–
R
X
FILTER &
BUFFER
2
2
AMP
OPTICAL
ISOLATION
V
S
+5V
3
DC/DC
CONVERTER
+5 V
SQUARE-
WAVE
OUTPUT
GROUND
3
10KΩ
4
5
OUTPUT
DRIVER
CIRCUIT
V
S
SQUARE-
WAVE
OUTPUT
GROUND
10KΩ
4
5
V
S-
V/F
OpenLine
®
I/O MODULE
PIN #
+
LOOP
SUPPLY
4-20mA
TRANSMITTER
TWISTED
PAIR
1
2
1
2
+
–
133Ω
ISOLATION
SIGNAL
CONDITIONING
AND
FILTER
CHANNEL A
5.23K
9 MODULE ID
I/O Modules
I/O
30
–
8 RXD
7 TXD
CH. A
A/D
CH. B
µP
OPTICAL
ISOLATION
+
+
LOOP
SUPPLY
4-20mA
TRANSMITTER
TWISTED
PAIR
3
4
3
–
4
133Ω
SIGNAL
CONDITIONING
AND
FILTER
10K
CHANNEL B
Vs
ISOLATED
DC/DC
CONVERTER
6 Vcc
5 GND
–
Vs
–
TERMINAL
BLOCK #
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Analog Current Input Modules
SPECIFICATIONS: By Part Number
Type/Function
G5, OpenLine
®
Specifications
Number of Inputs
Resolution
Absolute Accuracy @ 25°C
1, 2
Accuracy Drift w/Temp.
2
Maximum Offset
Maximum Gain (0 to 60°C)
Serial Data Format
Serial Data Packet
Step Response Time
3
Input Resistance (Rx)
Input Current Range
Maximum Overload
Logic Voltage Range
Maximum Logic
Supply Current@5Vdc
Module ID (Pin 9)
Isolation Voltage
Field to Logic
Field to Power
Module to Module
Channel A to Channel B
Environmental Conditions
Operating Temperature
3
Storage Temperature
1
2
Grayhill Part Number
73G-II020
Units
bits
µA/Count
% of full
scale
PPM/°C
PPM/°C
1 Ch., Diff.
12
4.88
+/- 0.2
1 Ch., Diff.
12
3.91
+/- 0.2
1 Ch., Diff.
12
1221
+/- 0.3
2 Ch., S.E.
12
4.88
0.075
2 Ch., S.E.
12
3.91
0.075
2 Ch., S.E.
12
4.88
0.075
73G-II420
73G-II5000
73L-II020
73L-II420
73L-II222
mS
ohms
mA or A
V
Vdc
mA/Ch.
KΩ
Vrms
Vrms
Vrms
+/- 50
+/- 55
12-bit
packet
—
2.5
133 +/- 1%
0-20mA
—
4.5-5.5
150
N/A
2500
2500
2500
—
0 to 60
-25 to 85
+/- 50
+/- 55
12-bit
packet
—
2.5
133 +/- 1%
4-20mA
—
4.5-5.5
120
N/A
2500
2500
2500
—
0 to 60
-25 to 85
+/- 150
+/- 150
12-bit
packet
—
2.5
.020 +/-.02%
0-5A TRMS
—
4.5-5.5
160
N/A
2500
2500
2500
—
0 to 60
-25 to 85
+/- 25
+/- 75
Right Justified,
16-bit
115.2Kb, N, 8, 2
1.5
133/- 1%
0-20mA
6
4.75-5.25
38
5.23
2500
2500
2500
None
-40 to 85
-55 to 100
+/- 25
+/- 75
Right Justified,
16-bit
115.2Kb, N, 8,2
1.5
133 +/- 1%
4-20mA
6
4.75-5.25
38
5.23
2500
2500
2500
None
-40 to 85
-55 to 100
+/- 25
+/- 75
Right Justified,
16-bit
115.2Kb, N, 8,2
1.5
133 +/- 1%
2-22mA
6
4.75-5.25
38
5.23
2500
2500
2500
None
-40 to 85
-55 to 100
°C
°C
Includes offset, gain, non-linearity and repeatability error terms.
Accuracy and drift graphs are available in Bulletin #753.
3
Time required for output to change to within 1% of final value.
Available from your local Grayhill Distributor.
For prices and discounts, contact a local
Distributor, a local Sales Office or Grayhill.
I/O Modules
I/O
31
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
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