| Memory |  | 
| SD Slot | Up to 32 GB (SD 2.0 compatible) | 
| Input/Output Interfaces |  | 
| Alarm Contact Channels | Resistive load: 1 A @ 24 VDC | 
| Ethernet Interface |  | 
| 10/100BaseT(X) Ports (RJ45 connector) | 1 Auto MDI/MDI-X connection
 | 
| Magnetic Isolation Protection | 1.5 kV (built-in) | 
| Compatible Modules | NM Series expansion modules for optional extension of RJ45 and fiber Ethernet ports | 
| Ethernet Software Features |  | 
| Configuration Options | Web Console (HTTP/HTTPS), Windows Utility, Device Search Utility (DSU), MCC Tool, Serial Console, Telnet/SSH Console
 | 
| Management | ARP, BOOTP, DHCP Client, DNS, HTTP, ICMP, IPv4/IPv6, PPPOE, SMTP, SNMPv1/v2c/v3, SNTP, TCP/IP, Telnet, UDP
 | 
| Windows Real COM Drivers | Windows 95/98/ME/NT/2000, Windows XP/2003/Vista/2008/7/8/8.1/10 (x86/x64), Windows 2008 R2/2012/2012 R2/2016/2019 (x64), Windows Embedded CE
 5.0/6.0, Windows XP Embedded
 | 
| Linux Real TTY Drivers | Kernel versions: 2.4.x, 2.6.x, 3.x, 4.x, and 5.x | 
| Fixed TTY Drivers | SCO UNIX, SCO OpenServer, UnixWare 7, QNX 4.25, QNX 6.x, Solaris 10, FreeBSD, AIX 5.x, HP-UX 11i, Mac OS X, macOS 10.12, macOS 10.13,
 macOS 10.14, macOS 10.15
 | 
| Android API | Android 3.1.x and later | 
| MIB | MIB-II | 
| Time Management | SNTP Client | 
| Unicast Routing | RIPV1/V2, Static Route | 
| Authentication | Local Account Accessibility, RADIUS, TACACS+ | 
| Serial Interface |  | 
| Connector | NPort 6600 Models: 8-pin RJ45 NPort 6450 Models: DB9 male
 | 
| No. of Ports | NPort 6450 Models: 4 NPort 6600-8 Models: 8
 NPort 6600-16 Models: 16
 NPort 6600-32 Models: 32
 | 
| Serial Standards | NPort 6610 Models: RS-232 NPort 6450/6650 Models: RS-232/422/485
 | 
| Secure Operation Modes | Reverse SSH, Secure Pair Connection, Secure Real COM, Secure TCP Client, Secure TCP Server, SSH
 | 
| Standard Operation Modes | Disabled, Ethernet Modem, Pair Connection, PPP, Printer, Real COM, Reverse Telnet, RFC2217, TCP Client, TCP Server, Terminal, UDP
 | 
| Baudrate | 50 bps to 921.6 kbps (supports non-standard baudrates) | 
| Console Port | NPort 6600 Models: RS-232 (TxD, RxD, GND), 8-pin RJ45 (19200, n, 8, 1) | 
| Data Bits | 5, 6, 7, 8 | 
| Stop Bits | 1, 1.5, 2 | 
| Parity | None, Even, Odd, Space, Mark | 
| Flow Control | RTS/CTS, DTR/DSR, XON/XOFF | 
| Pull High/Low Resistor for RS-485 | NPort 6450 / 6650 Models: 1 kilo-ohm, 150 kilo-ohms | 
| RS-485 Data Direction Control | NPort 6450 / 6650 Models: support ADDC® (automatic data direction control) | 
| Terminator for RS-485 | NPort 6450 / 6650 Models: 120 ohms | 
| Serial Signals |  | 
| RS-232 | TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND | 
| RS-422 | Tx+, Tx-, Rx+, Rx-, GND | 
| RS-485-4w | Tx+, Tx-, Rx+, Rx-, GND | 
| RS-485-2w | Data+, Data-, GND | 
| Power Parameters |  | 
| Input Current | NPort 6450 Models: 730 mA @ 12 VDC 
 NPort 6600 Models:
 DC Models: 293 mA @ 48 VDC, 200 mA @ 88 VDC
 AC Models: 140 mA @ 100 VAC (8 ports), 192 mA @ 100 VAC (16 ports), 285 mA @ 100 VAC (32 ports)
 | 
| Input Voltage | NPort 6450 Models: 730 mA @ 12 VDC 
 NPort 6600 Models:
 DC Models: 293 mA @ 48 VDC, 200 mA @ 88 VDC
 AC Models: 140 mA @ 100 VAC (8 ports), 192 mA @ 100 VAC (16 ports), 285 mA @ 100 VAC (32 ports)
 | 
| Reliability |  | 
| Automatic Reboot Trigger | Built-in WDT | 
| Alert Tools | Built-in buzzer and RTC (real-time clock) | 
| Physical Characteristics |  | 
| Housing | Metal | 
| Dimensions (with ears) | NPort 6450 Models: 181 x 103 x 35 mm (7.13 x 4.06 x 1.38 in) NPort 6600 Models: 480 x 195 x 44 mm (18.9 x 7.68 x 1.73 in)
 | 
| Dimensions (without ears) | NPort 6450 Models: 158 x 103 x 35 mm (6.22 x 4.06 x 1.38 in) NPort 6600 Models: 440 x 195 x 44 mm (17.32 x 7.68 x 1.73 in)
 | 
| Weight | NPort 6450 Models: 1,020 g (2.25 lb) NPort 6600-8 Models: 3,460 g (7.63 lb)
 NPort 6600-16 Models: 3,580 g (7.89 lb)
 NPort 6600-32 Models: 3,600 g (7.94 lb)
 | 
| Interactive Interface | LCD panel display (non-T models only) Push buttons for configuration (non-T models only)
 | 
| Installation | NPort 6450 Models: Desktop, DIN-rail mounting, Wall mounting NPort 6600 Models: Rack mounting (with optional kit)
 | 
| Environmental Limits |  | 
| Operating Temperature | Standard Models: 0 to 55°C (32 to 131°F) -HV Models: -40 to 85°C (-40 to 185°F)
 All other -T Models: -40 to 75°C (-40 to 167°F)
 | 
| Storage Temperature (package included) | Standard Models: -40 to 75°C (-40 to 167°F) -HV Models: -40 to 85°C (-40 to 185°F)
 All other -T Models: -40 to 75°C (-40 to 167°F)
 | 
| Ambient Relative Humidity | 5 to 95% (non-condensing) | 
| Standards and Certifications |  | 
| EMC | EN 55032/24 | 
| EMI | CISPR 32, FCC Part 15B Class A | 
| EMS | NPort 6450 Models: IEC 61000-4-2 ESD: Contact: 4 kV; Air: 8 kV
 IEC 61000-4-3 RS: 80 MHz to 1 GHz: 3 V/m
 IEC 61000-4-4 EFT: Power: 1 kV; Signal: 0.5 kV
 IEC 61000-4-5 Surge: Power: 1 kV
 IEC 61000-4-6 CS: 150 kHz to 80 MHz: 3 V/m; Signal: 3 V/m
 IEC 61000-4-8 PFMF
 IEC 61000-4-11
 
 NPort 6600 Models (except -48V/-HV models):
 IEC 61000-4-2 ESD: Contact: 4 kV; Air: 8 kV
 IEC 61000-4-3 RS: 80 MHz to 1 GHz: 3 V/m
 IEC 61000-4-4 EFT: Power 1 kV; Signal 0.5 kV
 IEC 61000-4-5 Surge: Power: 2 kV
 IEC 61000-4-6 CS: 150 kHz to 80 MHz: 3 V/m; Signal: 3 V/m
 IEC 61000-4-8 PFMF
 IEC 61000-4-11
 
 NPort 6600-48V Models:
 IEC 61000-4-2 ESD: Contact: 4 kV; Air: 8 kV
 IEC 61000-4-3 RS: 80 MHz to 1 GHz: 3 V/m
 IEC 61000-4-4 EFT: Power: 1 kV; Signal: 0.5 kV
 IEC 61000-4-5 Surge: Power: 1 kV
 IEC 61000-4-6 CS: 150 kHz to 80 MHz: 3 V/m; Signal: 3 V/m
 IEC 61000-4-8 PFMF
 
 NPort 6650-HV Models:
 IEC 61000-4-2 ESD: Contact: 4 kV; Air: 8 kV
 IEC 61000-4-3 RS: 80 MHz to 1 GHz: 3 V/m
 IEC 61000-4-4 EFT: Power: 4 kV; Signal: 2 kV
 IEC 61000-4-5 Surge: Power: 2 kV
 IEC 61000-4-6 CS: 150 kHz to 80 MHz: 3 V/m; Signal: 3 V/m
 IEC 61000-4-8 PFMF
 | 
| Safety | UL 60950-1 | 
| Traffic Control | NEMA TS2 | 
| Vibration | IEC 60068-2-6 | 
| Freefall | IEC 60068-2-34 | 
| Declaration |  | 
| Green Product | RoHS, CRoHS, WEEE |