Product Overview

RM7890; RM7895 100 VAC 7800 SERIES RELAY MODULES
66-1195—01 2
— Expanded safe-start check.
— Internal hardware status monitoring.
— Tamper resistant timing and logic.
• Access for external electrical voltage checks.
• Application flexibility.
• Dependable, long-term operation provided by
microcomputer technology.
• Five light emitting diodes (LEDs) for sequence
information.
• Interchangeable type plug-in flame amplifiers.
• Nonvolatile memory retains history files and
sequencing status after loss of power.
• Selectable relight or lockout on loss of flame.
OPTIONAL FEATURES
• Communication interface capability.
• First-out annunciation and system diagnosis are
provided by a two-row by 20-column display located on
the optional keyboard display module (KDM).
• Local or remote annunciation operation and fault
information.
• Remote reset.
• Burner controller data using S7800 Keyboard Display:
— Flame signal strength.
— Hold status.
— Lockout/alarm status.
— Sequence status.
— Sequence time.
— Total cycles of operation.
— Total hours of operation.
— Fault history providing the six most recent faults:
• Cycles of operation at the time of the fault.
• Fault message and code.
• Hours of operation at the time of the fault.
• Sequence status at the time of the fault.
• Sequence time at the time of the fault.
— Diagnostic information:
•Device type.
• Flame amplifier type.
• Flame failure response time.
• Manufacturing code.
• On/Off status of all digital inputs and outputs.
• Software revision and version of RM7890/
RM7895 and optional Keyboard Display Module.
• Status of configuration jumpers.
SPECIFICATIONS
Electrical Ratings:
See Table 1.
Voltage and Frequency:
100 Vac (+10/-15%), 50/60 Hz (± 10%).
Power Dissipation: 10W maximum.
Maximum Total Connected Load: 2000 VA.
Fusing Total Connected Load: 15A maximum, type SC or
equivalent.