NPI EPMS-07 Operating instructions

OPERATING INSTRUCTIONS AND
SYSTEM DESCRIPTION FOR THE
EPMS-07
EPMS-E-07
EPMS-H-07
EPMS-03
MODULAR SYSTEMS
VERSION 1.8
npi 2016
npi electronic GmbH, Bauhofring 16, D-71732 Tamm, Germany
Phone [phone]; Fax: [phone]
[email protected]; http://www.npielectronic.com

EPMS-Series User Manual
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version 1.8 page 2
1. Safety Regulations
VERY IMPORTANT: Instruments and components supplied by npi electronic are NOT
intended for clinical use or medical purposes (e.g. for diagnosis or treatment of humans),
or for any other life-supporting system. npi electronic disclaims any warranties for such
purpose. Equipment supplied by npi electronic must be operated only by selected, trained
and adequately instructed personnel. For details please consult the GENERAL TERMS
OF DELIVERY AND CONDITIONS OF BUSINESS of npi electronic, D-71732 Tamm,
Germany.
1) GENERAL: This system is designed for use in scientific laboratories and must be operated
by trained staff only. General safety regulations for operating electrical devices should be
followed.
2) AC MAINS CONNECTION: While working with the npi systems, always adhere to the
appropriate safety measures for handling electronic devices. Before using any device
please read manuals and instructions carefully.
The device is to be operated only at 115/230 Volt 60/50 Hz AC. Please check for
appropriate line voltage before connecting any system to mains.
Always use a three-wire line cord and a mains power-plug with a protection contact
connected to ground (protective earth).
Before opening the cabinet, unplug the instrument.
Unplug the instrument when replacing the fuse or changing line voltage. Replace fuse only
with an appropriate specified type.
3) STATIC ELECTRICITY: Electronic equipment is sensitive to static discharges. Some
devices such as sensor inputs are equipped with very sensitive FET amplifiers, which can
be damaged by electrostatic charge and must therefore be handled with care. Electrostatic
discharge can be avoided by touching a grounded metal surface when changing or
adjusting sensors. Always turn power off when adding or removing modules,
connecting or disconnecting sensors, headstages or other components from the
instrument or 19” cabinet.
4) TEMPERATURE DRIFT / WARM-UP TIME: All analog electronic systems are sensitive
to temperature changes. Therefore, all electronic instruments containing analog circuits
should be used only in a warmed-up condition (i.e. after internal temperature has reached
steady-state values). In most cases a warm-up period of 20-30 minutes is sufficient.
5) HANDLING: Please protect the device from moisture, heat, radiation and corrosive
chemicals.

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2. EPMS-07 Modular Plug-In System
2.1.General System Description / Operation
The npi EPMS-07 is a modular system for processing of bioelectrical signals in
electrophysiology. The system is housed in a 19” rackmount cabinet (3U) has room for up to 7
plug-in units. The plug-in units are connected to power by a bus at the rear panel.
The plug-in units must be kept in position by four screws (M 2,5 x 10). The screws are important
not only for mechanical stability but also for proper electrical connection to the system housing.
Free area must be protected with covers.
2.2.EPMS-07 Housing
The following items are shipped with the EPMS-07 housing:
 EPMS-07 cabinet with built-in power supply
 Mains cord
 Fuse 2 A / 1 A, slow (inserted)
 Front covers
Figure 1: Left: front view of empty EPMS-07 housing.
In order to avoid induction of electromagnetic noise the power supply unit, the power switch
and the fuse are located at the rear of the housing (see Figure 2, right).
2.3.EPMS-H-07 Housing
In addition to the standard power supply of the EPMS-07, the EPMS-H-07 has a built-in high
voltage power supply. This is necessary for all MVCS / MVCC modules, the HVA-100, HV-
TR150 and HVC-03M modules. The output voltage depends on the modules in use.
2.4.EPMS-E-07 Housing
The following items are shipped with the EPMS-E-07 housing:
 EPMS-E-07 cabinet
 External Power supply PWR-03D
 Power cord (PWR-03D to EPMS-E-07)
 Mains chord
 Fuse 1.6 A / 0.8 A, slow (inserted)
 Front covers
The EPMS-E-07 housing is designed for low-noise operation, especially for extracellular and
multi channel amplifiers with plugged in filters. It operates with an external power supply to
minimize distortions of the signals caused by the power supply.

EPMS-Series User Manual
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2.5.EPMS-03
The following items are shipped with the EPMS-07 housing:
 EPMS-07 cabinet with built-in power supply
 Mains cord
 Fuse 0,4 A / 0,2 A, slow (inserted)
 Front covers
Figure 2: Left: front view of EPMS-03 housing. Right: rear panel detail of EPMS-03 and
EPMS-07 housing.
In order to avoid induction of electromagnetic noise the power supply unit, the power switch
and the fuse are located at the rear of the housing (see Figure 2, right).
2.6.PWR-03D
The external power supply PWR-03D is capable of driving up to 3 EPMS-E housings. Each
housing is connected by a 6-pole cable from one of three connectors on the front panel of the
PWR-03D to the rear panel of the respective EPMS-E housing. (see Figure 3, Figure 4). A
POWER LED indicates that the PWR-03D is powered on (see Figure 3, left). Power switch,
voltage selector and fuse are located at the rear panel (see Figure 3, right).
Note: The chassis of the PWR-03D is connected to protective earth, and it provides protective
earth to the EPMS-E housing if connected.
Figure 3: Left: PWR-03D front panel view Right: PWR-03D rear panel view.
Note: This power supply is intended to be used with npi EPMS-E systems only.

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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