The R-series PAC programmable automation controller mounts on a SNAP PAC rack next to any combination of analog, digital, and serial SNAP I/O modules.
SNAP PAC racks can hold up to 4, 8, 12, or 16 modules. The 16-module rack accommodates up to 512 I/O points. Racks can be panel-mounted or DIN-rail mounted.
This compact rack includes everything you need for many industrial automation, remote monitoring, and data acquisition applications: a powerful R-series programmable automation controller with multiple communication capabilities, PAC Project control and HMI development software (included with controller purchase), and I/O for analog, digital, and serial control. Product support and training are free.
Learn more about the SNAP PAC System. Watch the Introduction to the SNAP PAC System video.
The R-series PAC processes all the I/O on its own rack as well as providing control for other racks with SNAP PAC brains and I/O, forming a complete system for monitoring, control, and data acquisition.
Ideal for cell control and systems with smaller point counts, the R-series PAC communicates over 10/100 Mbps Ethernet. The PAC communicates using industrial protocols and well-known IT (information technology) protocols, simultaneously.
- Industrial protocols include EtherNet/IP, Modbus/TCP, and Opto 22's memory-mapped OptoMMP™ protocol, which is open and documented.
- IT protocols include SMTP for email, FTP for file management, and SNMP for device management on the network.
Powerful standalone S-series PACs are also available.
Digital SNAP input and output modules include channel-specific LED indicator lights, so you can see at a glance which points are on. LEDs help you troubleshoot and check status easily.
Digital modules are available in both AC and DC models. Each module is tested twice at our factory in Temecula, California, before shipment. Most modules are UL and CE approved; part numbers ending in FM are also Factory Mutual approved.
For easier testing and commissioning, use digital input and output modules with manual/auto switches.
Leave the switch centered for automatic load switching, or manually flip it on or off for testing. The switches are top-mounted for easy access.
See modules with manual/auto switches:
Wiring connectors are located on the top of each SNAP I/O module, and most are removable for easy maintenance.
For example, if you need to test points, it's easy to replace the regular module with a module that has manual/auto switches: just release the wiring connector, replace the module, and plug the connector back in. No need to rewire.
See SNAP I/O modules:
Four-channel fused digital output modules use standard 4-amp fuses. If a fuse blows, it's easy to replace it: just pull the fuse handle located on the top of the module.
Optical isolation on all solid-state digital modules provides 4,000 volts of transient (4000 V for 1 ms) protection for sensitive control electronics from industrial field signals.
See digital SNAP I/O modules.
Need to connect to serial devices such as chart recorders, printers, RFID and barcode readers? Just add serial SNAP I/O modules where you need them.
PAC Control development software includes many commands for string handling as well as hundreds of commands for communication, discrete and process control, math, and logic.
Choose RS-232 or RS-485/422 serial I/O modules and connect to serial devices, plus serial devices over DH™, Modbus®, and Profibus®.
See serial SNAP I/O modules.
Download free integration kits for Data Highway and Modbus.
The SNAP PAC System includes motion control as well as discrete and process control.
This SNAP-SCM-MCH16 motion control host module supports up to 16 axes of stepper motor control through up to four motion control breakout boards.
See motion control in action: Watch the PAC-Based Motion Control video.
Learn more about the SNAP PAC System.
Each SNAP PAC R-series controller has up to 96 proportional-integral-derivative (PID) control loops built in.
Used for temperature control and other analog processes, PID loops are used to drive an input (a process variable) toward a particular value (the setpoint) and keep the input very close to that value by controlling an output. PIDs involve complex algorithms.
SNAP PAC brains also have up to 96 PID loops. When a brain or R-series PAC provides distributed control in a larger system headed by an S-series controller, the PID loops run independently on the distributed processor. If communication with the controller is lost, the PIDs continue to run, uninterupted.
Watch an OptoScreencast on configuring and tuning PID loops in PAC Control. The graphical debugger simplifies loop tuning.
Some of our SNAP I/O modules include loop sourcing power.
The SNAP-AOA-23-iSRC analog output module provides two channels of 4–20 current output with built-in loop sourcing capability for two 24 V loops. Both the channels and their loop sources are isolated from each other.
The SNAP-AILC and SNAP-AILC-2 modules provide input data from load cells and include isolated 10 VDC bridge excitation for up to four parallel 415/350 ohm load cells as a load cell front end.
For all three modules, a 24 VDC power source is wired to the separate connector on the module's top.
Special-purpose modules are designed to respond to customers' special requirements. These modules snap onto the same rack and work with all SNAP PAC controllers and brains.
- The SNAP-pH/ORP input module is used with pH or oxidation reduction potential (ORP) probes for monitoring bodies of water.
- The SNAP-AIPM input module simultaneously measures single-phase volts AC RMS and amps AC RMS, and then calculates true power and volt-amps.
Two-channel and 8-channel thermocouple input modules are available, all with cold-junction compensated terminals for connection to thermocouples.
These SNAP modules are software-configurable for a variety of millivolt or thermocouple inputs. Channel-to-channel isolated modules are also available if needed.
All SNAP PAC brains and R-series controllers provide built-in thermocouple linearization in the distributed I/O processor.
See thermocouple modules:
- Type E, J, K: 2-channel SNAP-AITM, isolated SNAP-AITM-i, or 8-channel SNAP-AITM-8
- Type B, C, D, G, N, T, R, or S: 2-channel SNAP-AITM-2, isolated SNAP-AITM2-i, or 8-channel SNAP-AITM-8
If high-density I/O is what you need, we have a variety of 8-, 16-, and 32-channel SNAP analog and digital modules in addition to our 2- and 4-channel models.
Popular analog modules:
Favorite digital modules:
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