Connections in Detail
2-1
Mk10 Serial Port Configurations
The Mk10 meter has a number of single serial port options, listed in Table 2-6.
Type Modem Communications
0 None
1 RS232 with RJ45
2 RS485 (4-wire) with RJ45
3 RS485 (4-wire) with Screw Terminals
5 RS232 with RJ45 and GSM/GPRS Power Supply
A A-Band PLC
C C-Band PLC
• Table 2-6 Mk10 Serial port options
RS-232
The RS-232 port on the meter uses an RJ45 connector, which complies with the RS-
232D standard. To connect to a modem, use an RJ45 to DB9 connector adapter.
RTS/CTS hardware handshaking is not supported. See Table 2-7 for Mk10 connection
details. Pin 1 of the RJ45 is furthest from the battery (i.e. on the right hand side).
RS232D RJ45
From Meter
RS232C DB9
To Modem
RS232C DB9
To PC (Null)
Description Full Name
TB1-1
1
(9) (9) Power Out +5V,140mA output
TB1-2 1 4 CD Carrier Detect (to meter)
Not available Mk10A
TB1-3 4 1 DTR Data Terminal Ready
(from meter)
Optional on Mk10A
TB1-4 5 5 GND Ground
TB1-5 2 3 RX Receive Data (to meter)
TB1-6 3 2 TX Transmit Data (from meter)
TB1-7
TB1-8
• Table 2-7 Mk10 RS-232 connections
1
On Mk10 type 1 ports TB1-1 may be connected to a +5V power source from the
meter. To do this, fit a jumper between pins 6 and 7 of PL8. PL8 is a 9 way jumper
block located under the meter lid just behind TB1. Pin 1 is on the right hand side, near
the PL8 label. This voltage is enough for small PSTN modems, but not for GSM. A
modem power supply card may be factory fitted to the Mk10 meter (type 5), in which
case the meter can supply 7V at 2W (no jumpers need be fitted in this case).
The Mk10 Meter 2-15
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