Rockwell Automation 1408-EMxx PowerMonitor 1000 Unit - Manual (Page 23)

PowerMonitor 1000 Unit 23
Rockwell Automation Publication 1408-IN001E-EN-P - September 2013
RS-485 Multi-drop Typical Wiring
Ethernet Communication
The power monitor with optional Ethernet network communication connects easily to
industry-standard Ethernet hubs and switches using standard UTP (unshielded twisted-pair)
cables with RJ-45 connectors.
Terminal Signal Function
1 TX+ Transmit + (TX+)
2 TX- Transmit - (TX-)
3 RX+ Receive + (RX+)
4
5
6 RX- Receive - (RX-)
7
8
24V DC (by user)
RS-485
+
-
SHLD
+
-
SHLD
+
-
SHLD
+
-
SHLD
*
*
PowerMonitor 1000
* 150 Ω Terminating Resistor (if used)
PowerMonitor 1000
PowerMonitor 1000 PowerMonitor 1000
RS-485 RS-485
RS-485
Nine-pin Null Modem Cable
(Female/Female)
To Computer
2
RS-485 Wiring:
2/C Shielded Cable 0.32…4 mm (22…14 AWG)
Connect A on converter to - on each PowerMonitor 1000.
Connect B on converter to + on each PowerMonitor 1000.
Connect shield at one end only of each link.
Maximum cable length 1219 m (4000 ft.).
RS-485 to RS-232 Converter
Examples:
Allen-Bradley 1761-NET-AIC (shown)
B&B Electronics 485SD9TB
TERM
A
B
COM
SHLD
CHS GND
CHS GND
RS-232
24V DC
DC NEUT
GRND