Dcc 7235 Layout And Connections; Power Input; Control System Inputs - Airmax MaxAir 30 LV Installation And Maintenance Instructions Manual

DCC7235 LAYOUT
1. POWER:
24VAC (nominal) supplied by a Class II transformer between terminals "R" ("24VAC LINE") and "C"
("24VAC RET"). The RED "POWER" LED illuminates when the control is powered.
Transformer rating: 20VA minimum
Voltage: 22.5Vac Minimum, 30Vac Maximum
Current: <100ma (All outputs and relays active)
NOTE: SUPPLY 24VAC POWER FROM THE SECONDARY OF AN NEC CLASS-2
TRANSFORMER ONLY.
2.

CONTROL SYSTEM INPUTS

a.) 0-10vdc Command — When SW3-1 "TEST" is ON, a 0-10 VDC input to J2 between Vin+ and
Vin– produces a variable PWM output of 0% through 100%. The polarity of the input signal
must be observed. See Figs 1 & 2:
Differential Input Voltage: 0 V to 10 VDC represents 0 to 100% PWM
Maximum Input V dc: +10.2 Vdc
Common Mode Voltage: - 0.2 V max negative, +5 V max positive
Signal (differential) Input impedance: >150K Ohm (Vin+ to Vin-)
Common mode impedance: > 150K Ohm to COM
FIG 1
Page 18
FIG 1