INSPECTION AND CONFIGURATION
M9B-HFS INTERFACE
2-10
Release 1.0 (97/10)
J7-1 External TTL shutdown input signal
J7-2 Polarity signal, open collector
(asserted by VSET -x)
J7-3 Isolation signal, open collector
(asserted by OUT OFF)
J7-4 Fault signal, open collector
(asserted when bit set in fault register)
J7-5 External Vcc, 18V maximum
(supplied by connecting and operating an external
source)
J7-6 External ground and shutdown return
(supplied by connecting and operating an external
source)
J7-7 Open collector user signal
(asserted by AUXA ON)
J7-8 Open collector user signal
(asserted by AUXB ON)
2.8 J7 User Signal Connector
Auxiliary connector J7, located on the HFS-M9B Interface rear panel, provides several signals to increase your
operating control of the supply. These signals are dependent on the operator's design and uses. The operation
of the J7 signal requires that you provide external Vcc and ground connection. Use a standard 8-position
telephone jack and data cable to connect to J7. To locate the connector, refer to the M9B-HFS interface rear
panel drawing in Figure 2.2-2. Pin 1 is located in the top right position of connector J7 when you face the rear
panel. See also Section
3.2 Command Summary for more information about the device dependent commands.
Figure 2.8-1 J7 Connector and Pin Settings
(
2800 Watt Model Orientation
)
2.8.1
J7 Cable Connection
Use a standard 8-position telephone jack and data cable to connect to J7. Add a ferrite block to reduce radiated
emission. The one inch square ferrite block with built-in housing clip is packaged and shipped with the power
supply interface card.
To install the ferrite block:
1. Position the block no more than 5 cm (2") from the power supply end of the J7 user cable.
2. Open the ferrite block housing.
3. Loop the cable through the ferrite block. See
Figure 2.8-2.
4.
Close the housing clip.
The ferrite block ensures that the power supply system meets radiated emission requirement 89/336/EEC for CE
mark approval. See the power supply's operating manual for noise specifications.
Figure 2.8-2 J7 User Cable with Ferrite Block
5 cm
Max.
To J7 Connector
Pin 1
Pin 8
To User Custom
Interface
J7 User Cable
Ferrite Block
FE-0443-CL