Rice Lake 920i Programmable HMI Indicator/Controller - Analog Output Card - Manual (Page 4)

Important
Connection to PLC Analog Input Module
If the PLC analog input uses a common ground (negative input of the analog card) and both PLC
channels are connected to the same option card, there is crosstalk and the values of the 2 inputs will be
merged.
Example: If one is inputting 6 mA and the other is inputting 12 mA they will merge and each looks like it is
inputting 9 mA.
6 + 12 / 2 = 9 mA
To prevent this cross talk, the PLC must have isolated grounds on the input channels.
Specifications
Resolution 16-bit, monotonicity over temperature
Linearity ±0.03% of full scale input
Current Output 0–20 mA or 4–20 mA (20% offset)
Maximum Load Resistance 840

Power consumption 3.9W (max. load @ 20 mA)
Voltage Output 0–10 VDC
Minimum Load Resistance 1.1 K

Power consumption 3.9W (max. load @ 10 VDC)
Input Protection Short circuit protection, 300W transient voltage suppression
Protection for ESD, EFT (electrical fast transients), tertiary lightning, and system-generated
transients per IEC 60001-4-2, 60001-4-4, and 60001-4-5; European Standards EN50082
and EN61000-4
230 W. Coleman St. • Rice Lake, WI 54868 • USA
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Rice Lake Weighing Systems is an ISO 9001 registered company.
© Rice Lake Weighing Systems Specifications subject to change without notice.
© Rice Lake Weighing Systems December 2014 PN 69089 Rev B