CROSS SECTION

Figure 1. Model T7900 Detail Drawing

GENERAL INFORMATION

The Model T7900 I/P, E/P Electro-Pneumatic Trans- The Model T7900 has the following options:
ducer controls an output pressure in proportion to an
analog electrical control signal. An internal feedback • Electronic Feedback Output closes the loop.
sensor monitors output pressure to achieve high accu-
racy. Model T7900 applications include machine tool • External Pneumatic Feedback port is available.
automation and robotics.
The Model T7900 has the following features:
• RFI/EMI protection eliminates electromagnetic and
radio interference. OPERATING PRINCIPLES
• Output pressure displays in psig, BAR, or kPa.
• Reverse acting capability for input and feedback The Model T7900 has a closed loop, integrated electronic
output signals control system that regulates outlet pressure in proportion
• Select Current or Voltage input signals using the to an electrical control signal.
keypad.
• Select Current or Voltage feedback output signal The Feed and Bleed Solenoid Valves control pressure in the
using the keypad. Signal Chamber of the Booster Section. Apressure sensor
• Independently adjustable PID tuning coefficients. measures the outlet pressure of the transducer and pro-
• Set operation parameters with the keypad. vides a feedback signal to the Electronics Section. Any
• Liquid Crystal display screen. variation in pressure between the setpoint and the outlet
• High and Low Alarm indicator lights. pressure activates the Feed or Bleed Solenoid Valve to
• Backlit Liquid Crystal display screen. correct the output.

2 Model T7900
 OUTLINE DIMENSIONS
4 1/4 3 7/16
108.0 87.4
Display 2 1/32 7/16 3 1/8
51.6 11.3 79.2
37/64
14.6 Cable
7 13/16 Connectors 2 INPUT

198.3 1
25.4
Mounting FEEDBACK/
Bracket ALARM

6 3/8
162.1 Keypad Remote 6 1/32
Pressure 153.2
Sensing
1/8 NPT 1/4-20
4 21/32 (optional) Screw (2)
118.2 (included with
Inlet/ mounting kit)
Supply Outlet
Filter GAUGE Port OUT 3 9/32
(typical) 83.2
3 1/4
82.4
Gauge 1 57/64
1 31/32 48 EXH
49.9 Port
1/4 NPT

13/16 55/64
20.5 Tapped 22.0 9/16
45/64 14.1
1 1/2 17.86 Exhaust
38.1
3
Port 1 1/2
76.2
(typical) 38.1
2 33/64
63.8 3
5 76.2
127.0
Figure 2. Outline Dimensions shown with Mounting Kit EA-19634-1 (Included with unit)

SPECIFICATIONS
FUNCTIONAL SPECIFICATIONS PERFORMANCE SPECIFICATIONS
Pneumatic psig 0-30 0-75 0-150 Deadband
Outputs [BAR] [0-2] [0-5] [0-10] (ISA S51.1) Adjustable from 0 to 7% of Full Scale
(kPa) (0-200) (0-500) (0-1000)
Input Signal 4-20 mA, 0-10 VDC Unit Accuracy Less than 0.50% Output Span
1 (ISA S51.1)
Supply Pressure 200 psig, [14 BAR], (1400 kPa) Max.
Frequency -3 db @ 1 Hz per ISA S26.4.3.1
Minimum psig 12 30 60 Response load configuration A.
Span [BAR] [0.8] [2.0] [4.0]
(kPa) (80) (200) (400)
Supply No Measurable Effect
Electrical Supply 24 VDC + 10% Pressure Effect

Power Consump. Less than 5 watts Vibration Less than 1% of Span under the following
Effect conditions: 5-15 Hz @ 0.8 inches constant
Analog Input 4-20 mA/500 ohms maximum, displacement 15-500 Hz @ 10 g's.
Signal/Impedance 0-10 VDC/400 ohms minimum
RFI/EMI Less than 0.5% EMC Directive 89/336/EEC
Air Consump. 0 @ steady state output Effect European Norms EN 50081-2 & EN 50082-2.
(SCFM)
Materials of Body and Housing . . . . . . . . .Chromate
Flow Rate 100 (17.0 m3/HR) @ 100 psig, Construction Treated Aluminum
(SCFM) [7 BAR], (700 kPa) supply @ 20 psig Cover and Pintle . . . . . . . Acetal Plastic
[1.5 BAR], (150 kPa) setpoint. Trim . . . . . . . . . . . . . . . . . . Plated Steel
Exhaust Flow 50 (85 m3/HR)@ 60 psig, [4 BAR], Elastomers . . . .Fluorocarbon & Silicone
(SCFM) (350 kPa) downstream pressure @ Finish . . . . . . . . . . . . . . . . . . . . .Epoxy
1
5 psig, [.35 BAR], (350 kPa) above setpt. Supply pressure must be no less than 5 psig,
[0.35 BAR], (35 kPa), above maximum output.
2
Temp. Range 00 F to +1600 F (-180 C to +710 C) Connecting cables sold separately.

Model T7900 3
 TYPICAL APPLICATION ORDERING INFORMATION
Catalog Number T7900 -
Input
0-10 VDC (0)
4-20 mA (4)

Output
Select appropriate psig, [BAR], or (kPa) range.
0-30 psig (04)
0-75 psig (05)
0-150 psig (07)

[0-2.0 BAR] (14)

[0-5.0 BAR] (15)
[0-10.0 BAR] (17)

(0-200 kPa) (24)

(0-500 kPa) (25)
(0-1000 kPa) (27)

Pipe Size
1/4" (02)
3/8 " (03)
1/2" (04)

Pipe Thread Type

NPT Thread (O)
Figure 4. Model T7900 Application (U)
BSPT Thread
BSPP Thread (H)

TYPICAL APPLICATION Feedback Type

0-10 VDC Feedback Output (0)
4-20 mA Feedback Output (4)
The Model T7900 transducer provides blanket air
pressure to control the flow of powder (or liquid) in a Option
Hopper. The T7900 output pressure in the Hopper External Pneumatic Feedback (P)
maintains a constant flow rate into the containers as
they fill. Load Cells continuously monitor the powder T7900 Cables and Connectors (Sold Separately)
level in the Hopper and send a feedback signal to the Part number Description
T7900. The T7900 adjusts the pneumatic output to 055-IPI-089-M Male connector (Feedback)
maintain a constant flow rate into the containers. 055-IPI-089-F Female connector (Input)
032-IPI-009-3M Male cable w/one connector (3 meter)
032-IPI-009-3F Female cable w/one connector (3 meter)

OPERATION INSTALLATION
For operating instructions, see the Model T7900 Electro-Pneu- For installation instructions, see the Model T7900 Electro-
matic I/P, E/P Transducer (Feedback Output) Operation and Pneumatic I/P, E/P Transducer Installation Instructions,
Maintenance Instructions, OM-5T7900FO. II-500T7900.

CS-500T7900
Litho in USA
Rev. F 2/03