D14643880 Issue L
Page 4 © Edwards Limited 2020. All rights reserved.
Technical data
2.6 Electrical supply
Note: The gauge external power supply should have a source impedance less than 50
.
2.7 Output signal
2.8 Gauge enable
2.9 Set point
The set-point consists of an open drain transistor (FET) output which operates when the gauge pressure is below a
preset value. The set-point has a fixed hysteresis of 500 mV. That is, if the trip level is set to 4 V, then the trip is set
(ON) when the gauge output is below 4 V and reset (OFF) above 4.50 V. When the trip is ‘ON’ pin 6 is internally
connected to pin 2 (power supply common).
Note: The external relay must not exceed these ratings.
2.10 Read set-point
Specified at gauge socket
Type NEC Class 2 or Limited Power or Limited Energy
Input voltage range +13.5 V to +36 V d.c.
Voltage ripple 1 V peak to peak maximum
Maximum power consumption 2 Watts
Voltage range 2 V to 10 V d.c.
Minimum load impedance 10 k
Current source 1 mA maximum
Control sense Active low
Active level <1.3 V
Control impedance 12 k pull up to positive supply
Fixed hysteresis 500 mV
Set-point output transistor ratings:
Voltage rating 40 V
Current rating 100 mA
Output voltage:
Settable range < 1.8 to 10.0 V
Accuracy 10 mV
Minimum load 200 k
Maximum current source 50 A
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