Digi TransPort WR21 - Landis and Gyr Maxsys Elite Meters

Meter Engineers Handbook for Cellular Communication 11
Cable Pinouts to Connect Elster A3 Meters to the Digi TransPort WR21 RS-485 Serial Port
4.3 Landis and Gyr MAXsys Elite Meters
Meter Pinouts
RS-232-2,3,4 & RS-485 (J2) DB25 Pinout
8
7
4
5
1
Digi TransPort WR21 Cable to Elite Meters
9
6
3
25
9
10
11
2
WR21
DB9 (Male)
MAXsys Elite Meter
J2 (DB25 Female)
Pin 1 NC
Pin 2 TX RS-232-2
Pin 3 RX RS-232-2
Pin 4 NC
Pin 5 CL +
Pin 6 NC
Pin 7 Gnd
Pin 8 NC
* Used for RS-485 (2-Wire)
Pin 9 CTS RS-232-3/485A_IN-
Pin 10 *TX RS-232-3/485A_OUT-
Pin 11 *RTS RS-232-3/485A_OUT+
Pin 12 NC
Pin 25 RX RS-232-3/485A_IN+
Pin 13 CTS RS-232-4/485B_IN-
Pin 14 *TX RS-232-4/485B_OUT-
Pin 15 Gnd
Pin 16 RX RS-232-4/485B_IN+
Pin 17 CL -
Pin 18 Gnd
Pin 19 *RTS RS-232-4/485B_OUT+
Pin 20 NC
Pin 21 R13
Pin 22 NC
Pin 23 NC
Pin 24 NC
8
7
4
5
1
1
6
Digi TransPort WR21 Cable to Elster A3 Meters
9
6
3
5
4
3
2
2
WR21
DB9 (Male)
A3 Meter
RJ11 (6-Pin Female)
Red R+ (out)
Black R- (out)
Green T- (in)
Yellow T+ (in)