Solartron Mobrey 3595 4C, User Manual

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Preparing and Installing The 3595 4C Interface 3595 4C User Manual Part One
2-12
35952350 (CH02/AA)
2.6 CONNECTING AN EXTERNAL POWER SUPPLY
IMP devices can be powered from an external power supply connected to the 3595 4C Interface card. This
supplies power to IMP devices through S-Net in exactly the same way as the internal power supply.
However, the extra capacity provided by the external supply allows up to 50 IMP devices to be operated
with a maximum cable length of 1km.
With the ‘on-card’ Jumper J201 link fitted, the 4C Interface card switches from the internal supply to the
external supply when the voltage of the external supply exceeds 12V. Should you wish to power IMP
devices continuously from the external supply, the
Jumper J201 link must be removed. (See Section 2.3)
The external power supply connection to the Host PC is made through a D-type connector on the 3595 4C
Interface card. The location of this D-type connector is shown in Figure 2.9.
Figure 2.9: Location of the external power connector on the PC rear panel
Table 2.4: External Power Connector
Pin Function
6, 7, 8, 9 +ve 12059V, 1A max.
1, 2, 3, 4, 5 -ve
2.6.1
External power supply requirements
An external power source must fulfil the following requirements:
•
Current limited to 1.5A - 5A, or protected by 5A fuse.
•
Voltage 12V to 50V. This depends on the wire gauge, the cable length and the number of IMP devices
connected to the cable.
•
Supply ripple of less than 100mV rms.
It is permissible for a battery-powered S-Net system to have a charger permanently connected. Batteries
generally provide sufficient output smoothing. A battery-powered system must be protected by a fuse (~5A).
A suitable supply, the 3595 95A 48V System PSU, is available from Solartron-Mobrey.
External Power Connector
(9-way male D-type)