EPMS-Series User Manual
___________________________________________________________________________
___________________________________________________________________________
version 1.8
page 5
2.7. System Grounding
EPMS-07/EPMS-03
The 19" cabinet is grounded by the power cable through the ground pin of the mains connector
(= protective earth). In order to avoid ground loops the internal ground is isolated from the
protective earth. The internal ground is used on the BNC connectors or GROUND plugs of the
modules that are inserted into the EPMS-07 housing. The internal ground and mains ground (=
protective earth) can be connected by a wire using the ground plugs on the rear panel of the
instrument. It is not possible to predict whether measurements will be less or more noisy with
the internal ground and mains ground connected. We recommend that you try both
arrangements to determine the best configuration.
EPMS-E-07
The 19" cabinet is connected to the CHASSIS connector at the rear panel. It
can be connected to the SYSTEM GROUND (SIGNAL GROUND) on the rear
panel of the instrument (see Figure 4).
The chassis can be linked to PROTECTIVE EARTH by connecting it to the
PWR-03D with the supplied 6-pole cable
and
by interconnecting the
GROUND and PROTECTIVE EARTH connectors on the rear panel of the
PWR-03D (see Figure 3). Best performance is generally achieved without
connection of the chassis to protective earth.
Important:
Always adhere to the appropriate safety measures.
Figure 4: Rear panel connectors of the EPMS-E-07
2.8. Technical Data
EPMS-07, EPMS-E-07 and EPMS-H-07
19” rackmount cabinet, for up to 7 plug-in units
Dimensions:
3U high (1U=1 3/4” = 44.45 mm), 254 mm deep
EPMS-07 and EPMS-H-07
Power supply: 115/230 V AC, 60/50 Hz, fuse 2 A / 1 A slow, 45-60 W
EPMS-E-07
External power supply (PWR-03D) 115/230 V AC, 60/50 Hz, fuse 1.6/0.8 A, slow
Dimensions of external power supply:
(W x D x H) 247 mm x 180 mm x 90 mm
EPMS-03
Power supply:
115/230 V AC, 60/50 Hz, fuse 0.4 A / 0.2 A slow
Maximum current supply: 500 mA
Dimensions:
3U high (1U=1 3/4” = 44.45 mm), 245 mm deep, 265 mm wide
