C
ONTROL
UNIT
Honeywell
• 52
6
6.1.2.1
Selection of terminal functions with dip switches
The shadowed terminals in Table 15 allow for three functional selections each with the so-
called
dip switches
. The switches have three positions, left, middle and right. The middle posi-
tion is for
Test mode
. See figure to locate the switches and make appropriate selections for
your requirements.
Figure 50. Dip switches
6.1.2.2
Disconnecting digital inputs from ground
The digital inputs (terminals 8-10 and 14-16) on the basic I/O board can be disconnected from
ground by removing a jumper on the control board. See Figure 51. Lift the plastic lid to expose
the jumper and apply long-nose pliers or similar to remove it.
Figure 51. Remove this jumper to disconnect the digital inputs from ground.
RS485*
AO1
AI2
AI1
OFF
ON
Current
Voltage
Current
Voltage
Current
Voltage
* Bus termination resistor
Содержание SmartVFD HVAC MR4
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