Series 1501 Selectronic® Micro-Controller/Annunciator
Revised
Catalog Section 50
■Alarm/Shutdown for 32 or 64 N.O. or N.C. Sensors
■Operating Sequence Selection
■Field Adjustable Sensor Nomenclature
■Selectable Sensor Lockouts Class A, B, C or P
■
■RS232 or RS485 Modbus RTU Communications
■Two Start/Run Timers and Elapsed Time Meter
■CSA Certified or NRTL Approved for Use in Class I, Div. 1 Grps. C & D Hazardous Locations
Description
The Series 1501 instrument is a microprocessor- based alarm, shutdown and control system with tachometer/hourmeter function. It annunciates in alphanumeric characters the protective device that has signaled an alarm or caused equipment shutdown. Information is called up and adjust- ments are made on a
Murphy’s Series 1501 system has seven SPDT relays. On the standard model, the relays are assigned to the following functions: Lube, Crank, Ignition/Motor, Fuel Valve, Load, Alarm, Shutdown.
The complete Series 1501 system consists of a head (monitor), sensor input terminal strip (two needed for 64 sensor models), 36 inch (914
mm)flat ribbon cable(s) for connecting the ter- minal block to the head/monitor, and a Class I, Div. 1,
The Series 1501 system is powered from 120
VACor 12 or 24 VDC. The head/monitor is rated intrin- sically safe and includes a communication port: RS232 or RS485 (Modbus RTU slave). This port allows for remote control functions such as Start/Stop, Load/Unload, etc., and for access to Series 1501 registers.
NRTL/C
Applications
The Series 1501 system can be configured to mon- itor applications such as: Air and Gas Compressors, Natural Gas Refueling, and other Industrial Operations. For a list of applications and our cataloged programs contact a Murphy sales representative. Custom programming available at additional charge.
Features
■32 or 64 sensor inputs (N.O. or N.C.) for alarm or shutdown.
■Easy operation/adjustments
■RS232 or RS485 Modbus RTU communica- tions.
■Automatic Engine Control.
■Two
■Seven Control Relay Outputs.
■Pre/Postlube Time Delay.
■Automatic Compressor Loading.
Specifications
Power Consumption: 120 VAC (7.5 VA); 12 VDC (3.5 watts); 24 VDC (3.5 watts).
Sensor Inputs: 32 to 64 N.O. and/or N.C. inputs
such as Murphy Swichgage® instruments. Field selectable as a Class A, B1, B2 , C , P or ESD for shutdown, alarm, or control function.
Outputs:
NOTE: For hazardous areas an approved isola- tion barrier must be used between sensor switch and input terminals if the sensor output comes from any energy storing device such as a relay or transistor.
Adjustable Time Delays:
(standard Series 1501)
• Prelube | • Rest |
• Process Delay | • Permissive |
•Run Delay • Idle/Cooldown
• Purge | • Postlube |
• Fuel Delay | • Crank |
• Load Delay | • Test |
•Class B1 Sensor Lockout
•Class B2 Sensor Lockout
•Before Ignition Ground or Electric Motor Stop (for up to 59 seconds)
Sensor Inputs Terminal Block: Rail mount DIN type; 32 terminals, screw type.
Operating Temperatures: 32 to 122°F (0 to 50°C).
Storage Temperatures:
Case: ABS plastic, 1/4 DIN (90 x 90 mm).
Interface Output: Factory configured for RS232;
Alphanumeric Display: 2 lines, each line with 16 characters (32 characters total).
Power Supply Enclosure:
• Lube • Load | • Crank • Alarm |
• Ignition/Motor | • Shutdown • Fuel Valve |
