GE Industrial Solutions AMP1H5 - Manual (Page 13)

TM
AMP1H5 INSTALLATION GUIDE
ZL0115-0A PAGE 13 ©2013 For technical support please contact 01132
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RS-485 COMMUNICATIONS
Daisy-chaining Devices to the Power Meter
The RS-485 slave port allows the power meter to be connected in a daisy chain with
up to 63 2-wire devices.
–
+
S
120 Ω terminator on the first and last device
of the daisy chain
Shield wire
NOTES:
• The terminal’s voltage and current ratings are compliant with the
requirements of the EIA RS-485 communications standard.
• The RS-485 transceivers are ¼ unit load or less.
• RS-485+ has a 47 kΩ pull up to +5V, and RS-485- has a 47 kΩ pull down
to Shield (RS-485 signal ground).
• Wire the RS-485 bus as a daisy chain from device to device, without
any stubs. Use 120 Ω termination resistors at each end of the bus (not
included).
• Shield is not internally connected to Earth Ground.
• Connect Shield to Earth Ground somewhere on the RS-485 bus.
For all terminals:
• When tightening terminals, apply the correct torque: 0.37 to 0.44 ft·lb
(0.5 to 0.6 N·m).
• Use 14-24 gauge(2.1-0.2 mm 2 ) wire for all connections.
BACNET DEFAULT SETTINGS
Setting Default Value* BACnet Object
Setup Password 00000 n/a
Reset Password 00000 n/a
System Type 40 (3 + N) Wye AV2
CT Primary Ratio 200 A AV3
CT Secondary Ratio 0.33 V AV4
PT Ratio 1:1 (none) AV5
System Voltage 480 V L-L AV6
Max. Theoretical Power Calculated from AV2, AV3,
AV5 & AV6 (with all default
settings, this would be
103.92 kW)
AI45
Display Mode 1 (IEEE Units) AV7
Phase Loss Voltage
Threshold
10% of System Voltage AV8
Phase Loss Voltage
Threshold
25% Phase to Phase
Imbalance
AV9
Demand: number of
subintervals per interval
1 (block mode) AV10
Demand: sub-interval
length
900 sec (15 min)
(AV11 default value is
90000 [1/100 seconds])
AV11
BACnet MAC Address 001 n/a
BACnet MS/TP Baud Rate 76.8 kBaud n/a
BACnet MS/TP Max_Master 127 Device
BACnet Device_ID Pseudo-random value
from 1,000,000 to
3,097,151
Device
BACnet Device Location Installed location not yet
identified
Device
Trend_Log Object 1
Log_Device_Object_
Property
AI1 (Real Energy) TL1
Trend_Log Object 2
Log_Device_Object_
Property
AI27 (Reactive Energy) TL2
Trend_Log Object 3
Log_Device_Object_
Property
AI34 (Total Real Present
Demand)
TL3
* Default values are preset at the factory. Once changed, there is no way to automatically reset
defaults. They must be restored individually. The baud rate and MAC address are set through the
user-interface screens, and the others are set by re-writing each Object (see BACnet Programming
Information section, next page).
Red
Black
Gray
0.37–0.44 ft•lb
(0.5–0.6 N•m)
Use 14-24 gauge wire