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RM7890A,B,C/EC7890A,B 7800 SERIES RELAY MODULES

7

66-1089—11

Fig. 1. Internal block diagram of the RM/EC7890.

CONFIGURATION 

JUMPERS

MICROCOMPUTER

RESET 

PUSH-

BUTTON

STATUS LEDs

SAFETY RELAY 

CIRCUIT

POWER SUPPLY

OPTIONAL KEYBOARD 

DISPLAY MODULE

PLUG-IN

FLAME

AMPLIFIER

RELAY

DRIVE 

CIRCUIT

CONTROL

POWER

TEST

JACK

REMOTE

RESET

DDL

DDL

COMMUNICATIONS

INDICATES FEEDBACK SENSING

TO RELAY STATUS FEEDBACK

AND LINE VOLT INPUTS

FIELD WIRING

INTERNAL WIRING

IGNITION

PILOT

MAIN VALVE

1K

RELAY

STATUS 

FEEDBACK

AND LINE

VOLTAGE

INPUTS

LIMITS

CONTROLLER

1K1

2K2

FLAME SIGNAL

TEST

NUMBERS IN CIRCLES ARE RELAY MODULE 

TERMINAL NUMBERS.

PROVIDE DISCONNECT MEANS AND 

OVERLOAD PROTECTION AS REQUIRED. 

120 VAC, 50/60 HZ (RM7890); 220-240 VAC, 

50/60 HZ (EC7890) POWER SUPPLY.

EC7890 REQUIRES A 220/240 VAC TO 120 VAC, 

10VA, STEPDOWN TRANSFORMER (NOT 

SUPPLIED) WHEN USING C7012E, F; C7061A, 

AND C7076A FLAME DETECTORS.

RS485

1

2

3

L1 

(HOT)

L2

3

6

5K1

4K1

2K1

10

8

9

4K

3K

2K

F

G

22

ALARM

3K1

4

L2

M11586A

F

RM7890C

N. O.  

1

2

2

1

3

3

maxon.su

Содержание rm7890b

Страница 1: ...ng Instructions 65 0109 Flame Amplifiers for the 7800 SERIES Product Data 65 0131 221818A C Extension Cable Assembly Product Data 65 0229 7800 SERIES Relay Modules Checkout and Troubleshooting 65 0249 S7810M ModBus Module SPECIFICATIONS Electrical Ratings See Table 3 Voltage and Frequency RM7890 120 Vac 10 15 50 60 Hz 10 EC7890 220 240 Vac 10 15 50 60 Hz 10 Power Dissipation 10W maximum Maximum To...

Страница 2: ...equency energy and if not installed and used in accordance with the instructions can cause interference with radio communications It has been tested and found to comply with the limits for a Class B computing device of Part 15 of FCC rules which are designed to provide reasonable protection against such interference when operated in a commercial environment Operation of this equipment in a residen...

Страница 3: ...Interlock b Flame Detector leadwires The maximum flame sensor leadwire length is limited by the flame signal strength c Remote Reset leadwires The maximum length of wire is 1000 feet 305 meters to a Remote Reset pushbutton d Data ControlBus Module The maximum Data ControlBus Module cable length depends on the number of system modules connected the noise conditions and the cable used The maximum le...

Страница 4: ...e control panel of the equipment Earth ground must be capable of conducting enough current to blow the 15A fuse or breaker in the event of an internal short circuit 2 Use wide straps or brackets to provide minimum length maximum surface area ground conductors If a leadwire is required use 14 AWG copper wire 3 Make sure that mechanically tightened joints along the ground path are free of nonconduct...

Страница 5: ... EC7890 to fail the dielectric test or possibly destroy the internal lightning and high current protection Equipment Recommended 1 Voltmeter 1M ohm volt minimum sensitivity set on the 0 to 300 Vac scale 2 Two jumper wires No 14 wire insulated 12 in 304 8 mm long with insulated alligator clips at both ends Note that an ammeter can be used in place of a jumper to confirm current draw of loads igniti...

Страница 6: ...nition transformer is okay 4 3 8 1 Ignition spark if ignition transformer is connected to terminal 8 2 Automatic pilot valve opens if connected to terminal 8 or main valve if DSI application NOTE Refer to wiring diagram of system being tested 1 Watch for spark or listen for buzz a Ignition electrodes are clean b Ignition transformer is okay 2 Listen for click or feel head of valve for activation a...

Страница 7: ...LINE VOLT INPUTS FIELD WIRING INTERNAL WIRING IGNITION PILOT MAIN VALVE 1K RELAY STATUS FEEDBACK AND LINE VOLTAGE INPUTS LIMITS CONTROLLER 1K1 2K2 FLAME SIGNAL TEST NUMBERS IN CIRCLES ARE RELAY MODULE TERMINAL NUMBERS PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED 120 VAC 50 60 HZ RM7890 220 240 VAC 50 60 HZ EC7890 POWER SUPPLY EC7890 REQUIRES A 220 240 VAC TO 120 VAC 10VA STEPDOWN T...

Страница 8: ... THE Q7800 SUBBASE THE R4222N1002 OR R4222V1002 RELAY IS ACCEPTABLE TO USE IN THIS TYPE OF APPLICATION USE THE N O PILOT DUTY CONTACTS MASTER SWITCH L1 HOT L2 Q7800 4 POWER 00 LED DISPLAY OPERATING CONTROLLER AND LIMITS BURNER START FLAME SIGNAL INITIATE ALARM POWER STANDBY POWER POWER PILOT FLAME MAIN PFEP 4 OR 10 SEC PILOT FLAME MAIN POWER RUN STANDBY 4 10 IGNITION INTERMITTENT PILOT MAIN VALVE ...

Страница 9: ... electrical signal voltage probes 3 Make sure no subbase wiring is projecting beyond the terminal blocks Tuck in wiring against the back of the subbase so it does not interfere with the knife blade terminals or bifurcated contacts IMPORTANT Install the RM EC7890 with a plug in motion rather than a hinge action 4 Mount the RM EC7890 by aligning the four L shaped corner guides and knife blade termin...

Страница 10: ...a hold condition is initiated and is displayed on the optional KDM for at least five seconds When the tolerances are met the INITIATE sequence restarts If the condition is not corrected and the hold condition exists for four minutes the RM EC7890 locks out Causes for hold conditions in the INITIATE sequence a AC line dropout detection b AC line noise that can prevent a sufficient reading of the li...

Страница 11: ...0 seconds for RM7890A1031 c Not applicable for RM7890C Standing Pilot d The Relight feature JR2 intact requires a 0 8 second FFRT Flame Amplifier The EC RM7890 locks out and indi cates a Fault 46 if a 3 second FFRT is used and jumper JR2 is not clipped and removed e Clipping and removing a site configurable jumper after 200 hours of operation results in a hard lockout code 110 f For RM7890A1064 RM...

Страница 12: ...eywell International Inc 1985 Douglas Drive North Golden Valley MN 55422 Honeywell Limited Honeywell Limitée 35 Dynamic Drive Toronto Ontario M1V 4Z9 customer honeywell com U S Registered Trademark 2010 Honeywell International Inc 66 1089 11 M S Rev 08 10 Printed in U S A m a x o n s u ...

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