Honeywell SmartVFD HVAC MR4 User Manual page 69

• 67
Honeywell
Relay
board 1
Terminal
21
22
23
24
25
26
32
33
*
If 230VAC is used as control voltage from the output relays, the control
circuitry must be powered with a separate isolation transformer to limit
short circuit current and overvoltage spikes. This is to prevent welding on
the relay contacts. Refer to standard EN 60204-1, section 7.2.9
Relay
board 2
Terminal
21
22
23
24
25
26
28
29
*
If 230VAC is used as control voltage from the output relays, the control
circuitry must be powered with a separate isolation transformer to limit
short circuit current and ovrvoltage spikes. This is to prevent welding on
the relay contacts. Refer to standard EN 60204-1, section 7.2.9
Relay board with two Type 8A/STST and one Type 8A/STDT relays.
5,5 mm isolation between channels.
External interface connector
See chapter 6.
Signal
Switching capacity24VDC/8A
250VAC/8A
*
Relay output 1
125VDC/0.4A
Min.switching load5V/10mA
Switching capacity24VDC/8A
250VAC/8A
Relay output 2*
125VDC/0.4A
Min.switching load5V/10mA
Switching capacity24VDC/8A
250VAC/8A
Relay output 3*
125VDC/0.4A
Min.switching load5V/10mA
Table 23. Technical information on Relay board 1
Relay board with two Type 8A/STST and standard thermistor input.
5,5 mm isolation between channels.
External interface connector
See chapter 6.
Signal
Switching capacity24VDC/8A
250VAC/8A
*
Relay output 1
125VDC/0.4A
Min.switching load5V/10mA
Switching capacity24VDC/8A
250VAC/8A
Relay output 2*
125VDC/0.4A
Min.switching load5V/10mA
Thermistor input Rtrip = 4.7 k
Table 24. Technical information on Relay board 2
Technical information
Technical information

(PTC); Measuring voltage 3.5V
P
RODUCT DATA