DS-640

Specifications

Memory Capacity	Standard	DSmobile DS-635/DSmobile DS-640: 128 MB DSmobile DS-740D: 256 MB DSmobile DS-940DW: 512 MB
Power Source		DSmobile DS-635/DSmobile DS-640/DSmobile DS-740D: USB bus-power DSmobile DS-940DW: USB bus-power/rechargeable Li-ion battery

Power Consumption *1	Scanning	DSmobile DS-635/DSmobile DS-640: Approx. 2.6 W DSmobile DS-740D: Approx. 3.3 W DSmobile DS-940DW: Approx. 4.6 W (Wi-Fi Mode) Approx. 4.2 W (USB Mode)
	Ready	DSmobile DS-635/DSmobile DS-640: Approx. 1.4 W DSmobile DS-740D: Approx. 1.4 W DSmobile DS-940DW *2: Approx. 2.3 W (Wi-Fi Mode) Approx. 1.6 W (USB Mode)

	Power Down	DSmobile DS-635/DSmobile DS-640: Approx. 0.01 W DSmobile DS-740D: Approx. 0.01 W DSmobile DS-940DW *2: Approx. 0.11 W
Dimensions		DSmobile DS-635/DSmobile DS-640: DSmobile DS-740D: DSmobile DS-940DW:
Weights		DSmobile DS-635/DSmobile DS-640: Approx. 1.03 lbs (466 g) DSmobile DS-740D: Approx. 1.43 lbs (646 g) DSmobile DS-940DW: Approx. 1.54 lbs (699 g)
Temperature	Operating	41°F to 95°F (5°C to 35°C) *3
	Storage	-4°F to 140°F (-20°C to 60°C)
Humidity	Operating	20% to 80%
	Storage	10% to 90%

Measured when the machine is connected to the USB interface.

(DSmobile DS-940DW) Measured when the rechargeable Li-ion battery is fully charged.

(DSmobile DS-940DW) Charging stops when the temperature of the specifications is exceeded.

Paper Type

Photo, Paper, Card (embossed), Business Card, Receipt

Document Size

DSmobile DS-635/DSmobile DS-640:

3.4 in. x 2.0 in. to 72 in. x 8.5 in. (86.4 mm x 50.8 mm to 1828.8 mm x 215.9 mm)

DSmobile DS-740D/DSmobile DS-940DW:

Single-sided Scan
3.4 in. x 2.0 in. to 72 in. x 8.5 in. (86.4 mm x 50.8 mm to 1828.8 mm x 215.9 mm)
2-sided Scan
3.4 in. x 2.0 in. to 16 in. x 8.5 in. (86.4 mm x 50.8 mm to 406.48 mm x 215.9 mm)
Output Guide
4.13 in. x 2.91 in. to 11.69 in. x 8.5 in. (105 mm x 74 mm to 297 mm x 215.9 mm)

Color/Black		Yes/Yes
TWAIN Compliant	Windows	Windows 7 (SP1) / Windows 8.1 / Windows 10 Windows Server 2012 / Windows Server 2012 R2 / Windows Server 2016 / Windows Server 2019
WIA Compliant	Windows	Windows 7 (SP1) / Windows 8.1 / Windows 10
ICA Compliant	Mac	macOS v10.12.x / v10.13.x / v10.14.x *1
Color Depth	Input	48 bit color processing
Color Depth	Output	24 bit color processing
Resolution	Interpolated	Up to 1200 x 1200 dpi
Resolution	Optical	Up to 600 x 600 dpi
Scanning Width		Up to 8.5 in. (215.9 mm)
Gray Scale		256 levels
Max. Speed		See your model’s page on your local Brother website.

For the latest macOS driver updates, visit support.brother.com.

Charging Time	2.6 hours
Continuous Standby Time	10 minutes (when the Auto Power Off feature is active)
Scannable Number of Sheets (WLAN ON)	200 sheets
Scannable Number of Sheets (WLAN OFF)	320 sheets

The numbers described in the Rechargeable Li-ion Battery table may differ depending on the documents scanned and on environmental factors, such as temperature and the charging and discharging method.
For longer battery life, turn the scanner off when you are not using it.

USB	USB 3.0 *1 Use a USB 3.0 cable (Standard A/Micro B) or USB 2.0 interface cable (Standard A/Micro B) that is no more than 6 feet (2.0 meters) long.
Memory Card (DSmobile DS-940DW)	microSD memory card: 2 GB - 32 GB (SDHC)
Wireless LAN (DSmobile DS-940DW)	IEEE 802.11b/g/n (Infrastructure mode) IEEE 802.11g (Wireless Direct)

Your machine has a USB 3.0 interface. The machine can also be connected to a computer that has a USB 2.0 interface.

Third-party USB ports are not supported.

Wireless Network Security	WEP 64/128 bit, WPA-PSK (TKIP/AES), WPA2-PSK (AES)
Setup Support Utility	WPS WLAN Assistant

Protocol (IPv4)	DHCP, APIPA (Auto IP), WINS/NetBIOS, DNS Resolver, mDNS, SNMPv1/v2c, ICMP, Web Services (Scan), HTTP/HTTPS server, LLMNR responder, SNTP Client
Protocol (IPv6)	RA, DNS Resolver, mDNS, LLMNR responder, Web Services (Scan), SNTP Client, HTTP/HTTPS server, ICMPv6
Network Security (Wireless)	SSL/TLS (HTTPS)
Wireless Certification	Wi-Fi Certification Mark License (WPA™/WPA2™ - Personal), Wi-Fi Protected Setup™ (WPS) Identifier Mark License

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