Johnson Controls VMA 1420 User Manual

VMA1400 Series Overview and Engineering Guidelines Technical Bulletin 30
Feature (Cont.) Specification
Temperature Inputs
Range
NTC: -20 to 105°C (-4 to 221°F)
Nickel: -45 to 121°C (-50 to 250°F)
Silicon: -40 to 102°C (-40 to 216°F)
Platinum: -50 to 200°C (-58 to 392°F)
Setpoint: 18 to 28°C (65 to 85°F)
Resolution (15 bit)
NTC: -17.7528°C (0.0034°F)
Nickel: -17.7528°C (0.0449°F)
Silicon: -17.7607°C (0.0307°F)
Platinum: -17.7437°C (0.0614°F)
Setpoint: -17.7772°C (0. 0018°F)
Non-Repeatability (estimate)
and Hysteresis
NTC: +0.011°C (+0.020°F) maximum
Nickel:
+0.100°C (+0.180°F)
Silicon:
+0.056°C (+0.10°F) maximum
Platinum:
+0.130°C (+0.234°F)
Setpoint:
+0.011°C (+0.020°F) maximum
Measurement Accuracy
NTC: +0.11°C (+0.20°F) maximum
Nickel:
+0.50°C (+0.90°F) maximum
Silicon: +0.33°C (+0.60°F) maximum
Platinum:
+0.67°C (+1.20°F) maximum
Setpoint:
+0.06°C (+0.10°F) maximum
Thermal Tolerance
+0.010% per degree C (+0.018% per degree F) maximum
Long Term Drift
+0.07% per year maximum
Sample Time
One second
Transient Protection
Isolated from 24 VAC, BOs, and N2 Bus;
Normal Mode RC; Common Mode Capacitors
Voltage Input
(AP-VMA1420 and VMA1430)
Range
0 to 16.5 VDC
Resolution (15 bit)
0.00053 VDC
Non-Repeatability (estimate)
+0.0055 VDC maximum
Measurement Accuracy
+0.075 VDC maximum
Thermal Tolerance
+0.018% per degree C (+0.032% per degree F) maximum
Long Term Drift
+0.7% per year maximum
Sample Time
One second
Transient Protection
Isolated from 24 VAC, BOs and N2 Bus;
Normal Mode RC; Common Mode Capacitors
Binary Inputs
Voltage Range and Trigger
Level
BI-1: 0 to 5 VDC with 3.1 VDC threshold
BI-2/BI-3: 0 to 15 VDC with 2.5 VDC threshold
Sample Time
50 ms pulse width (10 Hz maximum)
Transient Protection
Isolated from 24 VAC, BOs and N2 Bus;
Normal Mode RC; Common Mode Capacitors
Continued on next page . . .

Johnson Controls VMA 1420 Specifications

General

Brand	Johnson Controls
Model	VMA 1420
Category	Control Unit
Language	English