Asynchrone Modems for Baseband- Transmission
Overview
Westermo’s short haul modem MA-12 and MA19 is used for data communication over long distances and in harsh environments. The MA-12 and MA19 is used to connect equipment with RS-232/V.24 interfaces. Westermo's ±10 mA balanced current loop (W1) transmission technique makes it possible to transmit data up to 18 km at low data rates. At shorter ranges transmission rates up to 38.4 kbit/s can be achieved. All Westermo’s modems using the ±10 mA current loop (W1) technique are compatible with each other. The MA-19 should be fitted into the Westermo RV-01 rack system.
- Use this unit when the transmission
- distance is greater than 15 metres
- RS-232/V.24 interface
- Protects connected units from lightning/transients
- Units provide totally transparent data communications
- Very low delay time through units
- Units can transmit a single status signal
- Used to connect equipment on different earth potentials
- Guarantees reliable long-distance communication
Technical Data MA-12
| Power |
|
MA-12 AC |
MA-12 DC |
MA-12
36-55VDC |
|
|
| Rated voltage: |
115/230 VAC |
24 VDC |
48 VDC |
|
|
| Operating voltage: |
103-132 VAC
207-264 VAC |
12-36 VDC
|
36-55 VDC
|
|
|
| Rated current: |
24 mA @ 115 VAC
12 mA @ 230 VDC
|
170 mA @ 12 VDC
|
60 mA @ 36 VDC
|
|
|
| Rated frequency: |
48 – 62 Hz |
DC |
DC |
|
|
| Connection: |
Power inlet |
Screw terminal |
Screw terminal |
|
|
| Connector size: |
- |
0.2 – 2.5 mm2
24 – 12 AWG |
0.2 – 2.5 mm2
24 – 12 AWG |
|
|
| W1 |
| Electrical specification: |
Westermo 10 mA balanced current loop |
| Data rate: |
– 38400 bit/s |
| Connection: |
Screw terminal |
| Connector size: |
0.2 – 2.5 mm2, 24 – 12 AWG |
| RS-232 |
| Electrical specification: |
RS-232 V.24 |
| Data rate: |
– 38400 bit/s |
| Connection: |
25-pos. D-sub female DCE |
| Isolation between interfaces |
| Power to all other |
3000 V RMS @50 Hz and 60 s duration (MA-12 AC). |
| Power to all other |
1500 V RMS @50 Hz and 60 s duration (MA-12 DC). |
| Power to all other |
1500 V RMS @50 Hz and 60 s duration (MA-12 36-55 VDC) |
| Line to Line |
1500 V RMS @50 Hz and 60 s duration. |
| Standards |
| See Declaration of Conformity, DoC |
| Environmental |
| Temperature, operating: |
5 to 50°C |
| Mechanical |
| Dimension (W x H x D): |
161x53x139 mm |
| Weight: |
0.5 kg |
| Mounting: |
Table top |
| Degree of protection: |
IP 20 |
|
Technical Data MA-19
| Power |
|
MA-19 |
|
|
|
|
| Rated voltage: |
115/230 VAC |
|
|
|
|
| Operating voltage: |
103-132 VAC
207-264 VAC |
|
|
|
|
| Rated current: |
30 mA @
115 VAC
|
|
|
|
|
| Rated frequency: |
48-62 Hz |
|
|
|
|
| Connection: |
PS-02 |
|
|
|
|
| Connector size: |
- |
|
|
|
|
| W1 |
| Electrical specification: |
Westermo 10 mA balanced current loop |
| Data rate: |
– 38400 bit/s |
| Connection: |
Screw terminal |
| Connector size: |
0.2 – 2.5 mm2, 24 – 12 AWG |
| RS-232 |
| Electrical specification: |
RS-232 V.24 |
| Data rate: |
– 38400 bit/s |
| Connection: |
25-pos. D-sub female DCE |
| Isolation between interfaces |
| Power to all other |
3000 V RMS @50 Hz and 60 s duration (MA-19 via PS-2). |
| Line to Line |
1500 V RMS @50 Hz and 60 s duration. |
| Standards |
| See Declaration of Conformity, DoC |
| Environmental |
| Temperature, operating: |
5 to 50°C |
| Mechanical |
| Dimension (W x H x D): |
100x100 mm |
| Weight: |
0.1 kg |
| Mounting: |
Rack |
|
