SNAP PAC S-Series User’s Guide
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Appendix A
A: Technical Specifications
Specifications
Processor
266 MHz 32-bit ColdFire
®
5475 with integrated floating-point unit (FPU)
Memory
Total RAM
Battery-backed RAM
Flash
128 MB (16 MB available for PAC Control strategy)
8 MB
16 MB (7.5 MB available for PAC Control strategy; 4 MB available for file storage)
Removable storage
(Models manufactured November 2008 and later; requires firmware R8.4 or
higher) MicroSD card slot: supports MicroSD card up to 2 GB maximum
Backup battery
SNAP-PAC-S1: User-replaceable 3.6-volt TL 5242 /W lithium, 10-year minimum
power-off data retention (replacement part number: G4BATT32)
SNAP-PAC-S2: Rechargeable (recharges whenever the brain has power), 1-year
power-off data retention
Ethernet Communication
(wired) to host and I/O
Two independent 10/100 Mbps Ethernet network interfaces (RJ-45 connectors).
Each interface has a separate IP address (separate subnet).
Ethernet Communication
(wireless)*
Topologies
Security
Frequency 802.11a
Frequency 802.11b/g
Transmit Power
Antenna Connector
Roaming
Wireless LAN interface with 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.
5.180–5.240 GHz, 5.745–5.825 GHz
2.412–2.472 GHz, 2.484 GHz
15 dBm maximum
Reverse polarity SMA (RP-SMA or RSMA)
Supported within an SSID (Service Set Identifier) only
Serial Communication
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
SNAP-PAC-S1
RS-232 serial
RS-485 serial
Two RS-232 serial ports (one DB-9 and one pluggable connector); one port has
full handshaking. PPP is supported only on port 0.
One RS-485 serial port (pluggable connector); two-wire RS-485; optional
mistic
signal interrupts
