OPTO 22 – SNAP-PAC-SB2 _ SNAP PAC Serial Brain, analog/digital
OPTO 22 – SNAP-PAC-SB2 _ SNAP PAC Serial Brain, analog/digital
Quick Specs:
- SNAP PAC Serial Brain
- analog/digital
The SNAP-PAC-SB2 brain is an I/O and communications processor for your SNAP PAC System. Designed primarily to work in distributed systems controlled by a SNAP PAC S-series controller, the SNAP-PAC-SB2 provides local intelligence that frees the controller for supervisory tasks.
As an I/O processor, the SNAP PAC brain independently handles functions such as latching, counting, thermocouple linearization, watchdog timers, and PID loop control. These functions continue to work on the brain even if communication with the SNAP PAC controller is lost.
The SNAP-PAC-SB2 brain supports all the SNAP I/O analog and digital input and output modules available on the Opto 22 website. These modules can all be mixed on the same mounting rack and placed in any position on the rack. The brain and modules mount on a SNAP PAC rack, which holds up to 4, 8, 12, or 16 modules.
In addition to I/O processing, the SNAP-PAC-SB1 brain communicates over an RS-485 serial network (2-wire or 4-wire), and multiple SB-series brains can be installed in a multi-drop (daisy-chain) configuration.
The SNAP-PAC-SB2 brain does not offer high-speed digital functions; if you need high-speed counting (up to 20 KHz), quadrature counting, pulse measurement, and frequency and period measurement, choose the SNAP-PAC-SB1 brain instead. For a complete list of features and specifications, see form 1689, the SNAP PAC Brains Data Sheet, under the Docs & Downloads tab.
See a comparison chart for SNAP PAC controllers and brains.
Build your system in the SNAP I/O Configurator.
Specifications:
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Ethernet and Serial Brains [Ethernet Brains are Obsolete 3/1/22] |
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Power Requirements |
5.0 – 5.2 VDC at 750 mA maximum (does not include module power requirements) -W Models: 5.0 – 5.2 VDC at 1.0 A maximum (not including module requirements) |
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Memory |
16 MB RAM |
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Backup battery for real-time clock |
Rechargeable (recharges whenever the brain has power). 5-year life when power is off (replacement part number: SNAP-PAC-BATTERY-ML2430). (Models manufactured before August 2007 have a 3-volt CR2032 lithium battery, available in retail stores. See original user guide for replacement steps.) |
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Hold-down screw |
Torque: 8 in-lb (0.9 N-m) |
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Operating Temperature |
-20 to 60 °C |
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Storage Temperature |
-40 to 85 °C |
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Humidity |
0 – 95% humidity, non-condensing |
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Agency certifications |
-EB models (except -EB-W): UL, CE, RoHS, DFARS; UKCA |
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Warranty |
30 months from date of manufacture |
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Ethernet Brains (EB) only |
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Wired Ethernet Network Interfaces |
IEEE 802.3 network, 10Base-T and 100Base-TX. Automatic MDC/MDI-X crossover (Ethernet crossover cable not required for direct connection to PC). Two switched interfaces, allowing multi-drop (daisy-chain) or standard star network configuration. |
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Maximum Ethernet Segment Length |
100 meters with Category 5 or superior UTP |
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Wireless LAN interface* Frequency 802.11a |
Separate IP address |
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Serial Brains (SB) only |
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Network interfaces |
RS-485, 2- or 4-wire, twisted pair(s), with shield |
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Serial data rates |
300 baud to 230.4 Kbaud |
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Range: Serial multidrop |
32 stations maximum on a segment (including PC, controller, repeaters, and I/O units); up to 3000 ft (914 m) on a segment |
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Connector screw |
Torque: 1.7 in-lb (0.19 N-m) |
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* Requires Wired+Wireless model (SNAP-PAC-EB1-W or SNAP-PAC-EB2-W) |
