3594-4C SNet-PCI Interface
What is the 3594-4C Snet-PCI Interface?
The 3595 4C Interface card enables a PC, with PCI expansion slots, to
communicate with the Solartron-Mobrey S-Net system. The card provides
full timing control and error checking, in accordance with the S-Net
communication protocol.
1.1.1 PC System Requirements
The 3595 4C Interface card is fully compatible with a PC that has:
• A free PCI expansion slot
• A minimum of 128K user memory
• Microsoft Windows
Features
Control commands for measurement set-up
Measurement initiation
Measured data retrieval
Synchronised time stamping across the network
DC Power to all connected IMPs
Full timing control and error checking are
performed
on the data.
The card occupies one slot in the PC, and contains
its own data buffering. Data is exchanged with the
PC via the 64K dual-port RAM which is divided into
512byte pages, each page dealing with a particular
aspect of IMP operation.
Several cards, each driving a separate S-Net, may be
present in one PC if required. Each S-net supports
up to 50 IMPs.
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The interface can power up to 5 IMPs via the PC’s
internal supply; for larger systems an external
power supply must be connected. This power
supply can be situated by the PC, using the S-net to
supply each IMP, or may be local to the IMPs,
supplying power directly to each IMP.
Technical Specifications
Connections
Power Drain (on PC)
124-way edge connector for PCI expansion slot bus.
5V, 2.5W maximum
9-way D-type female connector for S-Net.
12V, 50mW maximum plus 1.2W for each 3595 Series IMP, and 1.8W
for each Universal Series IMP, when
powered from the internal power supply
(Up to a maximum of 5 IMP devices).
9-way D-type male connector for external power.
Environment
Temperature Operating 0°C to 55°C (50% Relative Humidity)
Power Drain (from external power supply, if used)
1.2W maximum per IMP.
0°C to 45°C (95% Relative Humidity)
Storage -40°C to 70°C
Requirements for external power supply, if used
Communications (S-Net) capability
12 to 50V DC, dependent on system size
and S-Net wire gauge.
Maximum of 50 IMP devices
Supply ripple less than 100mV rms.
Maximum S-Net cable length of 1500m.
Physical Dimensions
S-Net Power Supply capability
Overall length 6.8in.
Up to 5 IMP devices (3595 Series) can be supplied, at limited distances,
from the PC internal power supply.
Overall height 4.2in.
Overall width 0.8in.
Up to 50 IMP devices (3595 Series) can be supplied from an external
power supply. The actual number
depends on the voltage of the external supply and on the length and
gauge of the S-Net cable. (See the
“3595 IMP Installation Guide” for details)
Overall weight 0.2kg/0.44lbs.
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