Deutsch 
English | SNAP-PAC-SB2 SNAP PAC Serial Brain, analog/digital |
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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-SB2 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.
| Ethernet and Serial Brains | |
| 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) |
| Memory | 16 MB RAM |
| Backup battery for real-time clock | Rechargeable (recharges whenever the brain has power). 5-year life when power is off. (Models manufactured before August 2007 have user-replaceable batteries. See original user guide for details or contact Product Support.) |
| Hold-down screw | Torque: 8 in-lb (0.9 N-m) |
| Operating Temperature | 0 to 60 °C |
| Storage Temperature | -40 to 85 °C |
| Humidity | 0–95% humidity, non-condensing |
| Agency certifications | (-W models only) U.S., FCC Part 15 Subpart C; Canada, IC RSS-210 (-FM models only) Factory Mutual approved All models: CE, RoHS, DFARS |
| Warranty | 30 months from date of manufacture |
| Ethernet Brains (EB) only | |
| 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. |
| Maximum Ethernet Segment Length | 100 meters with Category 5 or superior UTP For 100 Mbps at this distance, use Category 5 or superior solid UTP. |
| Wireless LAN interface* Topologies Security Frequency 802.11a Frequency 802.11b/g Transmit Power Antenna Connector Roaming | Separate IP address Infrastructure, Ad-Hoc 802.11i: AES - Compatible with WPA2 Personal, TKIP - Compatible with WPA Personal, WEP. Note: TKIP/AES security is not supported in Ad-Hoc mode. 5.180–5.24 GHz, 5.745–5.825 GHz 2.412–2.472 GHz, 2.484GHz 15 dBm maximum Reverse polarity SMA (RP-SMA or RSMA) Supported within an SSID (Service Set Identifier) only |
| Serial Brains (SB) only | |
| Network interfaces | RS-485, 2- or 4-wire, twisted pair(s), with shield |
| Serial data rates | 300 baud to 230.4 Kbaud |
| 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 |
| * Requires Wired+Wireless model (SNAP-PAC-EB1-W or SNAP-PAC-EB2-W) | |