Hardware reference guide

I/O Modules
570
35013379 02 October 2007
Output
Specifications
The following table shows the output specifications for the analog input/output
module.
Output Specifications
Loop Voltage 7 ... 30 Vdc, up to 60 Vdc with an external resistor
Loop Resistance
Internal Voltage Drop 7 Vdc min, 30 Vdc max @ 20 mA
Resolution (bits) 12
Accuracy Error @ 25° C +/- 0.20% of full scale
Linearity Monotonic +/- 1 LSB
Accuracy Error 0 ... 60° C Typical: +/- 0.004%/°C of full scale.
Maximum:+/- 0.007%/°C of full scale
Isolation
Channel to Channel 500 Vac, 750 Vdc, for 1 minute
Channel to Bus 500 Vac, 750 Vdc, for 1 minute
Output Channel to Input
Channel
500 Vac, 750 Vdc, for 1 minute
Update Time 15 ms for 2 channels
Settling Time 900 μs to +/- 0.1% of final value
Fault Detection Open circuit indicator light and status byte
External Power Supply See loop voltage above
R
MIN
∗
V
loop
30Vdc–
0.02A
-------------------------------------=
R
MAX
V
loop
7Vdc–
0.02A
----------------------------------=
*No R
MIN
is required for loop
voltage less than 30 Vdc.
This document provided by Barr-Thorp Electric Co., Inc. 800-473-9123 www.barr-thorp.com