Switch settings, Danger! do not open connected unit, Specifications – Westermo MA-21 User Manual
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8
6021-2002
Switch settings
The MA-21 can through different switch settings be adapted to a vareity of running
conditions. To set the switches, open the plastic case by placing and turning a screw-
driver between top and bottom at the rear of the case.
DANGER! DO NOT OPEN CONNECTED UNIT
1 2 3 4 5
V.24/RS-232-C
CONNECTION
LINE
CONNECTION
MAINS
Specifications
Transmission
Asynchronous, full/half duplex or simplex
Interface 1
EIA RS-232-C/CCITT V.24
25-position D-sub female, DCE
Interface 2
20 mA current loop, selectable active or passive
Data rate
Up to 19.2 bit/s
Indicators
Power, RD, TD
Isolation
Galvanic isolation with opto-coupler (data transmission)
and transformer (supply)
Isolation voltage
1500V
Overvoltage protection
Mains: Breakdown voltage 440V at 230V AC
and 220V at 115V AC
Interface 2: Breakdown voltage transmitter
and receiver 37V
Surge capacity 0.6 kW for 1ms
Power supply
Switchable 115/230V +15/ –10% 48–62Hz
Fuse
100mA fast 5x20 mm
Power consumption
Max 5VA at 230V AC
Temperature range
5–50°C, ambient temperature
Humidity
0–95% RH, non-condensing
Dimensions WxHxD
161x53x139 mm
Weight
0.5 kg
Mounting
With rubber pads or screws. Screws: remove
the two "keyholes" on the bottom of the case