Specifications

Control Valves - SMARTLINK
®
MRV
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combustion systems for industry
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50120624-001/
Table 7: SMARTLINK
®
MRV Relay Output Interface Terminal Descriptions and Wiring Spec-
ifications
Table 7: SMARTLINK
®
MRV Relay Output Interface Terminal Descriptions and Wiring Specifications
Terminal Number / Name Description
Power Connections
14-22 AWG
No length limitations other than voltage drop considerations
Follow all local required wiring codes
Supply 24VDC (S24+) System power supply +24VDC (+/- 5%), 100 mA (max when all inputs are ON)
Relay Drive Inputs
(From Control Interface signals, RO1-RO5
The following input signals energize electromechanical relay coils. Each input has the following specification: 24VDC, 20
mA (max)
14-22 AWG wire
No length restrictions other than voltage drop considerations
Follow all local required wiring codes
#1 Input: 24VDC energizes a Form A relay, closing contacts between terminal #7 and #8.
#2
Input: 24VDC energizes 2 Form A relays, closing 2 contacts between terminal #9 and #10 and between #11 and #12.
(Redundant contacts are provided for additional reliability.)
#3 Input: 24VDC energizes a Form A relay, closing contacts between terminal #13 and #14.
#4 Input: 24VDC energizes a Form A relay, closing contacts between terminal #15 and #16.
#5 Input: 24VDC energizes a Form A relay, closing contacts between terminal #17 and #18.
Relay Contact Outputs
(To customer burner management system)
Each Form A (normally open) relay contact has the following specification:
Contact Voltage: 250VAC (max)
Contact Current: 12A (max)
Note: Contacts are "dry", i.e. no voltage is applied to these contacts by this module
14-16 AWG wire
No length restrictions other than voltage drop considerations
Follow all local required wiring codes
#7 and #8 Output: Contact closes between terminals when relay coil is energized on terminal #1.
#9 and #10 Output: Contact closes between terminals when relay coil is energized on terminal #2.
#11 and #12 Output: Contact closes between terminals when relay coil is energized on terminal #2.
#13 and #14 Output: Contact closes between terminals when relay coil is energized on terminal #3.
#15 and #16 Output: Contact closes between terminals when relay coil is energized on terminal #4.
#17 and #18 Output: Contact closes between terminals when relay coil is energized on terminal #5.