Fisher DPR900 - Input and Output Signal Details

1-4 Introduction
Automatic self-testing alarms
Incorrect configuration alarms
Miscellaneous
External output of selected input signal
Input signal filtering and linearization
External Auto/Manual and Remote/Local switching
Selectable digital signal logic
Digital output indication of mode, alarms, and panel
signals
On-line entry and alteration of configurable functions
INPUT SIGNALS
Analog
Four floating analog inputs, allowing signals between
-5 volts and +19 volts relative to supply ground. +5
volts signal added to input voltage giving 19 + 5 = 24
volts, which can vary by f 10%
Digital
Signal range: 4-20 mA (I-5V) or O-20 mA (0-W)
Four optically-isolated digital inputs for 24 Vdc.
Logical 0: interpreted as O-5 volts
Logical 1: interpreted as 1630 volts
Input Resistance
Current inputs: 250 ohms
Voltage inputs: greater than 500K ohms
OUTPUT SIGNALS
Two analog 4-20 mA or O-20 mA
Load 0 to 650 ohms
Load dependency less than 0.2% with a change from 0
to 650 ohms
Digital
Four digital outputs of 24V, up to 250 mA each
(D03-D06, with external 24V power only).
AC-powered, maximum of 100 mA total for all outputs.
lJM6.1:DPR900:9147
Change 2 -July 1992