Specifications

APPLICATION NOTE

Using the SUTRON RADAR LEVEL CONTROLLER (RLR-0002-1) with a MULTI-MODEM GPRS

(Wireless Modem MTCBA-G-F4)

4.2 MTCBA-G-F4 (RS-232 15-Pin Connector Pinout)

The Wireless Modem has a DE15-serial connector incorporated which includes a RS-232 interface link, audio link,

Boot and reset. This connector allows for access to the command line interface using a terminal program such as

HyperTerminal of Windows. The following table shows the pin assignment.

PIN EIA CCIT Designation

RS-232

DCD 109 Data Carrier Direct

6 RX 104 Receive Data (out)

2 TX 103 Transmit Data

8 DTR 108.2 Data Terminal Ready

9 GND Signal Ground

7 DSR 107 Data set ready

12 RTS 105 Request to Send

11 CTS 106 Clear to Send

13 RI 125 Ring Indicator

Audio 4 MIC (+)

5 MIC(-)

10 SPEAKER(+)

15 SPEAKER(-)

Boot 3 BOOT For factory use only

Reset 14 RESET To reset, connect toGND

momentarily

(Typical: 2mSec). Open for normal

operation.