37
Frame
Product Support: www.instron.com
Controls and electronics
59 Series control unit
The 59 Series control unit (Figure 16) is located inside the frame base. The unit houses control
components that: receive and process data from the various system transducers; communicates with the
system’s controlling software; and provides feedback to the system’s servo valve to operate the frame as
set up in the controlling software. The control components consist of a digital signal processor card,
transducer signal conditioning cards, and an optional analog outputs card (when purchased).
External connections to the control components are made on the panel face at the side of the frame
base. Connection descriptions are outlined in Table 2.
Computer system and controlling software
The computer system is the operator communication link with the various system controls and the frame.
Operators enter information and control parameters into the computer by way of the controlling software
package.
Table 2. 59 Series control unit function descriptions.
LOAD: A female 25-pin interface that connects the system’s load cell to the transducer conditioning
card.
STRAIN 1:
(optional)
A female 25-pin interface that connects an extensometer to an optional transducer conditioning
card.
STRAIN 2:
(optional)
A female 25-pin interface that connects an extensometer to an optional transducer conditioning
card. (Typically only required for transverse strain or other dual extensometer setups.)
ETHERNET: A connection for communication with the computer.
I/O:
(optional)
Allows connection of analog chart recorders and plotters, etc. Features 4 zero suppressed and
scaled 10V outputs via BNC connectors. A 25 pin D connector provides recorder pulse drive, 4
logic line outputs and 4 logic line inputs to trigger internal and external events.
SERVICE: A connection for optional communications modem for remote diagnostics.
SERVICE Display: Provides an indication of self-tests that are performed by the controls during system startup. You
should see the following general sequence: the two 7-segment LEDs count up to “21” and then
back down, and then the letter “P” will flash alternately with the number “22”. This entire
sequence typically takes between one and two minutes to complete. “P” indicates the all self-
tests have passed. If the LEDs should flash the letter “F” at any time during the sequence, this
indicates that a self-test has failed. If this occurs, you should contact your local Instron Services
department as directed on page 13 for assistance in troubleshooting the failure.
When conditions are normal, the T indicator is green and the A indicator is blinking red.
Figure 16. The 59 Series control unit.
Expansion Port
(optional)
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