Power, Chassis ground, Usb specifications – Measurement Computing LGR-5320 Series User Manual
Page 36
LGR-5320 Series User's Guide
Specifications
36
Power
Table 14. Power specifications
Parameter
Condition
Specification
External power input
PWR+ (pin73)
PWR– (pin74)
9 VDC min to 30 VDC max
External power supply
9 VDC to 30 VDC
Power supply fuse
Littelfuse 2 A NANO
2®
Slo-Blo
®
Subminiature surface mount fuse
Power supply current
+9 VDC input, continuous logging mode
LGR-5325: 225 mA typ, 630 mA max
LGR-5327: 405 mA typ, 655 mA max
LGR-5329:450 mA typ, 690 mA max
+30 VDC input, continuous logging mode
LGR-5325: 100 mA typ, 210 mA max
LGR-5327: 165 mA typ, 220 mA max
LGR-5329: 175 mA typ, 230 mA max
Encoder supply
(LGR-5327/5329 only)
External supply of 1.5 A @ 5 VDC fused up to 42.4 V
pk
(50 V
DC
) @ 2 A
Protection diodes (30BQ060, 0.5 V
max
drop) protecting against reverse polarity.
Encoder supply fuse
(LGR-5327/5329 only)
Littelfuse 2 A NANO
2®
Slo-Blo
®
Subminiature Surface Mount Fuse
Battery power
One 3 V button cell lithium battery (BR2032 or CR2032) required to power real-time
clock when device is powered off.
Note 7:
The LGR-5325 AGND and GND pins are tied together internally. These grounds are electrically
isolated from the EGND (earth ground) pin.
The LGR-5327 AGND, GND and ENC- pins are tied together internally. These grounds are
electrically isolated from the EGND (earth ground) pin.
The LGR-5329 AGND, GND and ENC– pins are tied together internally. These grounds are
electrically isolated from the EGND (earth ground) and the IGND (isolated ground) pins.
Chassis ground
Table 15. Chassis ground specifications
Parameter
Specification
Number of inputs
Single terminal EGND (pin 80)
Isolation method
10 nF/1000 V ceramic capacitor in parallel with 1
MΩ resistor
Note 8:
The EGND pin is isolated from the measurement and I/O circuits. Only use the EGND pin to connect a
LGR-5320 Series device to a local chassis ground connection. Do not use the EGND pin as a return
path for any of the analog or digital I/O.
USB specifications
Table 16. USB specifications
Parameter
Specification
USB device type
USB 2.0 (full-speed)
USB device compatibility
USB 1.1, 2.0
USB cable length
3 meters max.
USB cable type
A-B cable, UL type AWM 2527 or equivalent