13
A M P1B1 , A M P1C 2 , A M P1C 3 Com pac t Powe r a nd E ne rg y M ete r
RS-485 Communications (AMP1Cx Only)
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.
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
(only at one point).
For all terminals
• When tightening terminals, apply the correct torque: 0.37-0.44
ft·lb (0.5-0.6 N·m).
• Use 14-24 gauge (2.1-0.2 mm
2
) wire.
Display Screen Diagram
LCD Screen
Buttons
Next
RESET
--------
00000
SPASS
Setup
Passwords
SETUP
--------
00000
Back
Next
SDMND
INTRV
--------
6
5
4
3
2
1
Demand
SEC
--------
00900
Back
Next
S DIS
Display
Units
UNITS
--------
IEEE
IEC
Back
To Setup p. 1 “S PWR”
Max
PPS
--------
1
2
5
10
20
50
Pulse
Output
Next
mS/P
--------
500
250
100
50
25
10
SPULS
Back
Wh/P
--------
10000
1000
100
10
SPLOS
Back
IMBAL
--------
0.25
Next
VOLTS
--------
0.10
Phase
Loss
Ba
ck
T
o
SET
U
P
BDS
–
+
S
Shield Wire
Display Screen Diagram
Tx
Rx
ERR
Screen Name or Units
Diagnostic
Alert
Logo
Numeric Data
Alive Indicator
Transmit Data
RS-485 Equipped
Units Only
Receive Data
Error
Receive Data
00
.
0
.
0
.
0
00 0 0 0
00
.
0
.
0
.
0
(Right) Next
(Left) Back
(Up) Select
(Down) Select
+
–
120 Ω terminators on the first and last devices of the daisy chain
Next
RESET
--------
00000
SPASS
Setup
Passwords
SETUP
--------
00000
Back
Next
SDMND
INTRV
--------
6
5
4
3
2
1
Demand
SEC
--------
00900
Back
Next
S DIS
Display
Units
UNITS
--------
IEEE
IEC
Back
To Setup p. 1 “S PWR”
Max
PPS
--------
1
2
5
10
20
50
Pulse
Output
Next
mS/P
--------
500
250
100
50
25
10
SPULS
Back
Wh/P
--------
10000
1000
100
10
SPLOS
Back
IMBAL
--------
0.25
Next
VOLTS
--------
0.10
Phase
Loss
Ba
ck
T
o
SET
U
P
BDS
–
+
S
Shield Wire
Display Screen Diagram
Tx
Rx
ERR
Screen Name or Units
Diagnostic
Alert
Logo
Numeric Data
Alive Indicator
Transmit Data
RS-485 Equipped
Units Only
Receive Data
Error
Receive Data
00
.
0
.
0
.
0
00 0 0 0
00
.
0
.
0
.
0
(Right) Next
(Left) Back
(Up) Select
(Down) Select
+
–
0.37 to 0.44 ft-lb
(0.5 to 0.6 N-m)
Use 14 to 24 gauge wire
Red
Black
Gray
Next
RESET
--------
00000
SPASS
Setup
Passwords
SETUP
--------
00000
Back
Next
SDMND
INTRV
--------
6
5
4
3
2
1
Demand
SEC
--------
00900
Back
Next
S DIS
Display
Units
UNITS
--------
IEEE
IEC
Back
To Setup p. 1 “S PWR”
Max
PPS
--------
1
2
5
10
20
50
Pulse
Output
Next
mS/P
--------
500
250
100
50
25
10
SPULS
Back
Wh/P
--------
10000
1000
100
10
SPLOS
Back
IMBAL
--------
0.25
Next
VOLTS
--------
0.10
Phase
Loss
Ba
ck
T
o
SET
U
P
BDS
–
+
S
Shield Wire
Display Screen Diagram
Tx
Rx
ERR
Screen Name or Units
Diagnostic
Alert
Logo
Numeric Data
Alive Indicator
Transmit Data
RS-485 Equipped
Units Only
Receive Data
Error
Receive Data
00
.
0
.
0
.
0
00 0 0 0
00
.
0
.
0
.
0
(Right) Next
(Left) Back
(Up) Select
(Down) Select
+
–
Next
RESET
--------
00000
SPASS
Setup
Passwords
SETUP
--------
00000
Back
Next
SDMND
INTRV
--------
6
5
4
3
2
1
Demand
SEC
--------
00900
Back
Next
S DIS
Display
Units
UNITS
--------
IEEE
IEC
Back
To Setup p. 1 “S PWR”
Max
PPS
--------
1
2
5
10
20
50
Pulse
Output
Next
mS/P
--------
500
250
100
50
25
10
SPULS
Back
Wh/P
--------
10000
1000
100
10
SPLOS
Back
IMBAL
--------
0.25
Next
VOLTS
--------
0.10
Phase
Loss
Ba
ck
T
o
SET
U
P
BDS
–
+
S
Shield Wire
Display Screen Diagram
Tx
Rx
ERR
Screen Name or Units
Diagnostic
Alert
Logo
Numeric Data
Alive Indicator
Transmit Data
RS-485 Equipped
Units Only
Receive Data
Error
Receive Data
00
.
0
.
0
.
0
00 0 0 0
00
.
0
.
0
.
0
(Right) Next
(Left) Back
(Up) Select
(Down) Select
+
–
