AP8a
Seite 4
3
Connection examples for using the AP8a with 5B amplifiers
The most different 5B amplifiers can be used with the AP8a. Please see the relevant data sheets of the
5B modules for further connection examples.
3.1
MA-U: Voltage measurement (DC and AC decoupled)
The input is differential (balanced).
Close jumpers J5 and J7 of the MA-U for AC decoupling to suppress
DC components of the signal. AC decoupling can only be used in the
0.5V and
1V measuring range.
3.2
MA-UNI: Strain gage measurement with DC
Strain gages are resistors operated in bridge circuits. The EX voltage is
2.5V DC. The input amplifier is operated in differential mode. If
necessary, the sensor lines compensate for line losses.
In the case of bridge extensions, precise supplementary resistors must
be used (0.1%; TC15). If using 100
bridges, it is only possible to
supply with +2.5V, dividing the measuring range in half.
The Jumpers J12, J13 of the MA-UNI must only be closed in 6-wire
applications. For some applications, it is better to connect the screen to
earth and not to the internal ground (0EX).
4
Important notes for using the AP8a
•
The AP8a is only suitable for extra-low voltages
–
please observe the relevant regulations!
•
An electrically isolated power unit (with CE) must be used for power supply.
•
All accessible pins are electrostatic sensitive devices. Provide an earthed conductive work place when
installing.
•
Only use non-solvent detergents for cleaning. The product is designed to be maintenance-free.
•
If using the direct switches, the relevant LO input is connected with the succeeding DAQ system and therefore
may be connected to ground. Open inputs should be closed.
•
The board must not be used for safety-relevant tasks. With the use of the product, the customer becomes
manufacturer by law and is therefore fully responsible for the proper installation and use of the product. In the
case of improper use and/or unauthorized interference, our warranty ceases and any warranty claim is
excluded.
Do not dispose of the product in the domestic waste or at any waste collection places. It has to be either duly
disposed according to the WEEE directive or can be returned to bmcm at your own expense.
5
Technical data (typical at 20°C, after 5min., 9-40V supply)
•
Electrical data
Power supply:
9..40V (max. 1A DC, default setting ex works) or +5V DC ±5% (max. 1.5A DC)
Max. current to be drawn for the modules:
max. 1A (
total of current of all individual modules)
Electrical isolation:
depending on the module in use; in case of direct switching no electrical isolation!
Max. permissible potentials:
60V DC acc. to VDE, max. 1kV ESD on open lines
•
General data
Temperature ranges // Relative humidity:
operating temp. 0..70 C, storage temp. -25..70 C // 0-90% (not condensing)
CE standards:
EN61000-6-1, EN61000-6-3, EN61010-1; for decl. of conformity (PDF) visit
ElektroG // ear registration:
RoHS and WEEE compliant // WEEE Reg.-No. DE75472248
Dimensions (L x W x H):
backplane: 18cm x 10cm x 2cm; with DIN rail carrier and bracket: 18.3cm x 10.5cm x 4.3cm
Available accessories (optional):
7-pin pluggable spring clamp terminals ZU7ST (package of 8), power supply ZU-PW40W,
waterproof housing ZU-PBOX-PG, ZU-PBOX-LAN
Warranty:
2 years from date of purchase at bmcm, claims for damages resulting from improper use excluded
Manufacturer: BMC Messsysteme GmbH. Subject to change due to technical improvements. Errors and printing errors excepted. Rev. 4.1
02/05/2020
