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FEATURES
● ACCEPTS HIGH LEVEL VOLTAGE INPUTS TO ±10V
● PROVIDES HIGH LEVEL VOLTAGE OUTPUTS TO ±10V
● 1500 VOLT TRANSFORMER ISOLATION
● ANSI/IEEE C37.90.1e-1989 TRANSIENT PROTECTION
● 5 POLES OF FILTERING
● 110dB CMR
● 400Hz SIGNAL BANDWIDTH
● ±0.05% ACCURACY
● ±0.02% LINEARITY
● MIX AND MATCH OM5 TYPES ON BACKPANEL
● CSA CERTIFIED, FM APPROVED, CE COMPLIANT
DESCRIPTION
Each OM5-AV voltage output module provides a single channel of analog
output. The track-and-hold circuit in the input stage can be operated in a hold
mode where one DAC can supply many output modules, or a track mode
where one DAC is dedicated to each module. In addition to the track-and-hold
circuit, each module provides signal buffering, isolation, filtering, and
conversion to a high level voltage output.
Setting of the track or hold mode is controlled by the logic state of WR EN\,
module pin 23. When pin 23 is low, the track mode is enabled. If pin 23 is
open or high, the hold mode is enabled. The module is designed with a
completely isolated computer side circuit which can be floated to ±50V from
Power Common, pin 16. This complete isolation means that no connection
is required between I/O Common and Power Common for proper operation
of the track and hold circuit. For a low state, simply connect pin 23, the Write-
Enable pin, to I/O Common, pin 19.
The OM5-BP-MUX-C backpanels allow host computer control of the WR EN\
control line, which allows multiplexing of one host DAC to up to 64 OM5-AV
output modules. During power up, the output remains 0V output for 100ms,
which allows the track-and-hold circuit to be initialized.
FIGURE 1. OM5-AV Block Diagram.
OM5-AV
Voltage Output Modules
+Out
–Out
R
LOAD
–EXC
Backpanel
Term Block
1
2
NC
4
6
5
3
Surge
Suppression
and
Protection
Isolated
Field-Side
Power
Track
&
Hold
4
3
2
1
+EXC
–V+V
Power
Oscillator
Isolated
Computer-Side
Power
V
IN
18
23
I/O Common
WR EN\
+5V
Power Common
Isolation Barrier
19
Range
Select
NC
17
16
NC
NC