Aalborg PSV-D - Manual (Page 6)

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b.1.1 Valve Connection to PSV-D
Connect the two valve solenoid lead wires (E1 and E2) to pins 1 and 2 of the 9
pin "D" connector. There is no polarity on these connections.
b.1.2 Input Reference Signal Connection
Connect the desired analog reference signal input (0 to 5 VDC or 4 to 20 mA) to
the appropriate pin locations on the 9 pin "D" connector of the PSV-D. The PSV-
D will recognize automatically which signal is being provided. If both are connect-
ed, the PSV-D will give priority to the 4 to 20 mA signal when that signal is greater
than 2 mA.
(a) When using the 0 to 5 VDC reference signal, connect the POSITIVE side of the
reference to pin 5, and the NEGATIVE (ground) to pin 6 on the 9 pin "D" connector.
(b) When using the 4 to 20 mA reference signal, connect the POSITIVE side of the
reference to pin 7, and the NEGATIVE (ground) to pin 8 on the 9 pin "D" connector.
For optional RS232 or IEEE488 interfaces please contact your distributor or Aalborg.
b.1.3 TTL Signal Connection
The TTL valve ON/OFF control feature is not required for the device to function.
Use of this SAFETY feature allows for complete de energizing of the solenoid
valve to help ensure valve closure. If this feature is not used, a continuous supply
of nominal power will be supplied to the solenoid valve.
When left unconnected on the 9 pin "D" connector, the device will default to the
"HIGH" setting in accordance with the selected position of the jumper. The facto-
ry default setting is LOW (0 VDC) = OFF and HIGH (5 VDC) = ON.
Table I TTL Signal Selection
To reverse this configuration, remove the square cap on the back of the PSV-D
(see figure e-1). The 4th and 5th position determines the TTL logic configuration.
The factory default setting is set with the jumper on position 4. Moving this jumper
to position 5 will yield the reverse configuration [LOW (0 VDC) = ON and HIGH (5
VDC) = OFF] (see Table I).
The NEGATIVE (ground) side of the reference signal inputs is internally
connected on the printed circuit board to power ground.
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Jumper Setting (position) TTL LOW (0 VDC) TTL HIGH (5 VDC)
4 OFF ON
5 ON OFF