Specifications

Control Valves - SMARTLINK
®
MRV
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combustion systems for industry
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Table 10: SMARTLINK
®
MRV Relay Output Interface Checkout Procedures
Table 10: SMARTLINK
®
MRV Relay Output Interface Checkout Procedures
SMARTLINK
®
Interface Panel
Terminal Name (Abbreviation)
SMARTLINK
®
Control
Interface Relay Driver
Terminal Name
(Abbreviation)
Checkout Procedure to verify proper relay operation
Relay Output Terminals
(Form A contacts: normally open when
non-powered)
Relay Output Drivers
(On state: <1.6 VDC;
Off state: 24VDC )
Alarm (AL)
Alarm Return (ALR)
Relay Out 1 (RO1)
Cycle system power off and then on with the Control Interface Mode switch in the middle posi-
tion. Temporarily disconnect the communication and power to one of the Valve Actuators by
unplugging its connector on the Network Interface. Within a few seconds, the Alarm relay, con-
nected to the RO1 terminal of the Control Interface, is energized and the RO1 terminal is driven
to less than 1.6 VDC in the ON state. Verify the Alarm light of the Relay Output Interface is on
and the contacts are closed between AL and ALR.
Control Enable #1 (CE1)
Control Enable #2 Return (CE2R)
Relay Out 2 (RO2)
Cycle system power off and then on with the Control Interface Mode switch in the middle posi-
tion. After power up, the Control Enable relays, connected to the RO2 terminal of the Control
Interface, are energized. The RO2 terminal is driven to less than 1.6 VDC in the ON state. Verify
the Control Enable light of the Relay Output Interface is on and the contacts are closed between
CE1 and CE2R. (A jumper should exist between Interface Panel terminals CE1R and CE2. The
CE1 and CE2R output provides a redundant series contact to be used as a fail-safe combustion
system running interlock or permissive.) Temporarily disconnect the communication and power
to one of the Valve Actuators by unplugging the connector on the Network Interface. Within a
few seconds, the Control Enable relays are de-energized and the output contacts are opened.
RO2 is in the OFF state at 24VDC. Verify the Control Enable light of the Relay Output Interface is
now off and the contacts are open between CE1 and CE2R.
Purge Position Proven (PPP)
Purge Position Proven Return (PPPR)
Relay Out 3 (RO3)
Execute Command A-0, Enter Manual Mode, using the Control Interface or User Display. Move
to position index #9, maximum. When the system has reached index #9, the Purge Proven relay,
connected to the RO3 terminal of the Control Interface, is energized and the RO3 terminal is
driven to less than 1.6 VDC in the ON state. Verify the Purge Proven light of the Relay Output
Interface is on and the contacts are closed between PPP and PPPR.
Light-Off Position Proven (LPP)
Light-Off Position Proven Return (LPLR)
Relay Out 4 (RO4)
Execute Command A-0, Enter Manual Mode, using the Control Interface or User Display. Move
to position index #0, minimum. When the system has reached index #0, the Light-Off Position
relay, connected to the RO4 terminal of the Control Interface, is energized and the RO4 terminal
is driven to less than 1.6 VDC in the ON state. Verify the Light-Off Position relay of the Relay
Output Interface is on and the contacts are closed between LPP and LPPR.
Custom Output #1 (CO1)
Custom Output #1 Return (CO1R)
Relay Out 5 (RO5)
Cycle system power off and then on with the Control Interface Mode switch in the middle posi-
tion. After power up, the CO1 relay, connected to the RO5 terminal of the Control Interface, is
energized. The RO5 terminal is driven to less than 1.6 VDC in the ON state. Verify the CO1 light
of the Relay Output Interface is on and the contacts are closed between CO1 and CO1R. (The
CO1/CO1R relay contact serves as a fail-safe, redundant combustion permissive/interlock out-
put.) Temporarily disconnect the communication and power to one of the Valve Actuators by
unplugging the connector on the Network Interface. Within ten seconds, the CO1 relay is de-
energized and the output contacts are opened. RO5 is in the OFF state at 24VDC. Verify the
CO1 light of the Relay Output Interface is now off and the contacts are open between CO1 and
CO1R.