Flowserve Logix 1200e LGAIM0044 - Manual (Page 24)

44-24 Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611
4 to 20 mA Analog Output Retrofit
General Information
The Logix 1200e digital positioner/controller can be
retrofitted to provide an analog feedback signal of the
stem position. This position feedback option has the
following features and specifications:
• Does not interfere with positioner operation.
• Zero and span adjustments of the feedback signal
are independent of the positioner and can be
adjusted manually.
• Output follows actual position of valve, including all
failure modes of positioner except loss of power. An
output of 3.15 mA is transmitted with loss of power
to the analog output board.
• Immune to RFI/EMI disturbances.
• Can be retrofitted in the field.
CAUTION: Because the analog output board
shares common signals with the Logix internal
circuitry, the two units cannot be powered by
the same external power supply or by power
supplies that share a common reference.Gal-
vanic isolation of at least 50 VDC must be pro-
vided between the supplies powering the Logix
unit and the analog output board.
• Available for explosion-proof and safe applications
(CSA, FM).
Masoneilan (Linear Actuators, cont.)
71 Domotor
25 10125644
50 10125645
100 10125646
88
6 10124595
16 10126752
47 B 10125702
48 B 10125702
“D” Domotor 200 10127467
71-2057AB-D 10129359
71-40413BD 10129461
Masoneilan (Rotary Actuators)
33 B 10125542
35
4
10125542 6
7
70 10 10125542
Vanguard
37/64 10127426
* Adjustable Mounting kit 10126736 may be needed if
handwheels are used.
Table VIII: Logix Mounting Kits (Continued)
Model Size Mounting Kit
Figure 21: Analog Output Board Power
Specifications
Potentiometer Range
of Rotation
40° to 95°
Power Supply Range
12.5 to 40 VDC
(24V DC typical)
Maximum Load
Resistance (ohms)
(Supply Voltage - 12.5) / 0.02
Current Signal Output 4-20 mA
Linearity 1.0% F.S.
Repeatability 0.25% F.S.
Hysteresis 1.0% FS
Operating
Temperature -40° to 185° F
(-40° to 85° C)
Ambient
Temperature
For a 100° F (38° C) change in
ambient temperature, maximum
zero shift is 0.4% FS, maximum
span shift is 0.7% FS
Power Supply
Effects
Out put signal change is less than
0.05% FS when supply voltage is
varied between 12.5 and 40 VDC
Positioner Command
Current Loop
(Logix Input)
Position Feedback
Current Loop
(Logix Output)
+ – – +
R
Load
4 to 20 mA
Current Source
12.5 to
40 VDC
Power
Supply
–
+
+
–
CAUTION: Isolated power sources required.