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U1660 LON-Add-On Component
Meter Reading Module
• 8 active S0 pulse inputs
required pulse duration > 100 ms
• LED state display
• FTT-10A transceiver (78 kBit/s)
• Standard network variables
for energy, instantaneous power and state
• LED status display
3-349-214-03
2/12.05
QUALITY MANAGEMENT SYSTEM
DQS certifizied per
DIN EN ISO 9001 Reg. No.1262
Applications
Display Elements
The LON add-on component is used for scanning measuring
points within the energy control system in a decentralized fashion.
The U1660 meter reading module processes data from up to 8
energy meters with pulse output (S0), or floating contact. The
active inputs do not require any additional power supply which
minimizes wiring expenses.
The add-on component expands the functions offered by the
U1601 summator, the U1602 micro-summator and the U1603
mini-summator to include external inputs via the LON interface.
Power LED
Active LED
Error LED
Function
U1660 is a meter reading module with eight active inputs. It
determines energy and instantaneous power on the basis of SO
pulses.
The valence of a pulse (delta) is calculated from the meter con-
stant (nciPulseRate). The pulses are counted (nvoEnergyPower)
and converted into energy (nvoEnergy). Instantaneous power
(nvoPower) is calculated from the distance between two pulses.
The network variables nvoEnergyPower, nvoEnergy and
nvoPower are calculated and transmitted after each pulse. The
meter readings (nvoEnergyPower, nvoEnergy) are lost upon auxil-
iary voltage failure.
In addition to energy and power measurement, the state of the
binary inputs is transferred to the network (nvoInputState[8],
nvoAllInState).
M1 bis M8
Controls
Service Sockets
ID Key
On: Operating voltage on
On: S0 inputs are supplied with
voltage. If the adapter is in
unconfigured or offline state,
the LED is off and the SO inputs
are not supplied with voltage.
Signals the state of the LON node
(„Service LED“), is activated for
2 seconds upon receipt of a wink
command.
On: Module has no application
Blinking: Module is not configured
On: Current flow via pulse contact
of the meter
Direct LON bus access for service
applications
Identifies the module in the network
(„Service Key")
GOSSEN METRAWATT GMBH

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U1660 LON-Add-On Component
Meter Reading Module
Inputs
8 ea. S0 pulse
per DIN 43864
The active inputs supply the power
required for operation. The + terminals
of the SO inputs S01+ ... S08+ are con-
nected with each other.
Additional Information:
• nvoAllInState supplies the state of all 8 S0 inputs. This has no
effect on the energy and power measuring functions. Each
input is equivalent to one bit:
S0 Input
Bit
87654321
87654321
LON Interface
Chip
Protocol
Technology
Transmission via
Transmission Speed
3150 neuron chip
LONTALK® Protocol
LONWORKS® FTT-10A
(Free Topology Transceiver)
twisted pair (twisted 2-wire link)
78 kBit/s
LON Network Variables
Number Name
SNVT
Range
Function
0
nviRequest
SNVT_obj_request
1
nvoStatus
SNVT_obj_status
2 nvoNodeType SNVT_str_asc 20 characters Device type (U1660)
3 nciDeviceLabel SNVT_str_ascii 31 characters Device ID
4 ... 11 nvoEnergy[8]; SNVT_elec_whr_f 0 ... 1E38 Wh Meter reading
in Wh (floating)
12 ... 19 nvoPower[8]; SNVT_power_f 0 ... 1E38 W Instantaneous power
in W (floating)
20 ... 27 nciPulseRate[8] SNVT_count_f
0,01 ... 1E38 Meter constant
/ kWh
in 1 / kWh (floating)
28 ... 35 nvoEnergyPower NonSNVT, 10 Byte,
for U1601
Number of pulses
(long),
Pmom in W (floating),
Reserve (uint)
36 ... 43 nvoInputState[8] SNVT_switch
State of binary
inputs
44 nvoAlllnState NonSNVT, 1 Byte,
für U1601
State of binary
inputs
Cut-off day function:
Receipt of a time stamp acvtivates storage to memory of the current meter readings
45
nviSetTime
SNVT_time_stamp
Input for time stamp
46 nvoTimeStamp SNVT_time_stamp
Time stamp for meter
readings
47... 54 nvoEnergyP[8] SNVT_elec_whr_f 0... 1E38 Wh Meter reading in Wh
(floating)
Löschen der Zählerstände:
55
nviEnergyClear SNVT_lev_disc 0 ( OFF )
Delete nvoEnergy and
nvoEnergyPower
Example: nvoAllInState = 3
means: input 1 and input 2 are ON (current flow), all other
inputs are OFF.
• Owing to the operating system of the neuron chip, the power
values of small pulse distances are subject to heavy scatter-
ing.
• Use of U1660 without summator:
The energy of the network variable nvoEnergy is calculated by
means of float arithmetics with simple accuracy.
The resolution of the float numbers decreases with increasing
value.
The greater the value, the greater the error resulting from the
addition of an energy delta. The evaluating application must
take this feature into account and ensure that the meter read-
ings are deleted (nviEnergyClear).
Alternatively, the network variable nvoEnergyPower (number
of pulses) can be used. It is not an SNVT.
Example:
Value
Resolution
1 0,00000012
8 0,00000095
128 0,000015
2.048 0,00024
32.768 0,0039
524.288 0,063
8.388.608 1,00
• Use of U1660 with the U1601, U1602 or U1603 summators:
The float arithmetic problems do not arise here because the
number of pulses is transmitted as integer number
(nvoEnergyPower).
Power Supply
Operating Voltage
Closed-Circuit Current
Operating Current
(at 100% load)
24 V DC
85 mA
290 mA
2 GOSSEN METRAWATT GMBH

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U1660 LON-Add-On Component
Meter Reading Module
Electrical Safety
Type
Protection
EN 60950
Housing IP 20
per DIN VDE 0470 part 1 / EN 60529
Terminal Assignments
Electromagnetic Compatibility EMC
Interference Emission EN 50090-2-2: 1996
Interference Immunity EN 50090-2-2: 1996
Ambient Conditions
Operating Temperatures 0 °C ... +50 °C
Storage Temperatures –25 °C ... +50 °C
Relative Humidity
20% ... 90%,
no condensation allowed
Mechanical Design
Mounting
Dimensions
(H x W x D)
Terminals
DIN EN 50022 system rail
90 x 105 x 59 mm
20 ea. single pole screw terminal
Dimensional Drawing
U1660
105
All dimensions in mm
Order Information
Description
Meter reading module 8 inputs (S0)
59
Article number
U1660
U1660
1
13
free Pulse inputs
LON bus
Power supply
12
24
Screw Terminals U1660
No. Designation
1 +24 V
2 LON A
5 S0 1+
6 S0 2+
7 S0 3+
8 S0 4+
9 S0 5+
10 S0 6+
11 S0 7+
12 S0 8+
13 GND
14 LON B
17 S0 1-
18 S0 2-
19 S0 3-
20 S0 4-
21 S0 5-
22 S0 6-
23 S0 7-
24 S0 8-
Assignments
Operating voltage +
LON bus
free
free
Meter 1 pulse contact +
Meter 2 pulse contact +
Meter 3 pulse contact +
Meter 4 pulse contact +
Meter 5 pulse contact +
Meter 6 pulse contact +
Meter 7 pulse contact +
Meter 8 pulse contact +
Operating voltage –
LON bus
free
free
Meter 1 pulse contact +
Meter 2 pulse contact +
Meter 3 pulse contact +
Meter 4 pulse contact +
Meter 5 pulse contact +
Meter 6 pulse contact +
Meter 7 pulse contact +
Meter 8 pulse contact +
The + terminals of pulse inputs S0 1+ ... S0 8+ are connected with each other.
GOSSEN METRAWATT GMBH
3