5
IQ 35M Meter Series
IB02601008E September 2011 www.eaton.com
ZL0073-0C
Solid-State Pulse Output (IQ 35MA11, IQ 35MA12, IQ
35MA13, and IQ 35MA2x Only
These models have one normally open (N.O.) KZ Form A output and one normally
closed (N.C.) KY output. One is dedicated to energy (Wh), and the other to Alarm.
The IQ 35MA11 also provides an additional N.O. reactive energy (VARh) contact.
See the Setup section for configuration information.
The solid state pulse outputs are rated for 30VAC/DC nom.
Maximum load current is 100mA at 25°C. Derate 0.56mA per °C above 25°C (e.g.
86mA@50°C).
* The over-current protective device must be rated for the short circuit current at the
connection point.
** All pulse outputs and communication circuits are only intended to be connected
to non-hazardous voltage circuits (SELV or Class 2). Do not connect to hazardous
voltages.
~
=
~
=
≤ 100 mA
≤ 100 mA
~
=
≤ 100 mA
Alarm
Energy
Output
+ – S
Power Source**
3-30VDC
6-30VAC
Power Source**
3-30VDC
6-30VAC
Over-Current Protective
Device* (not supplied)
Power Source**
3-30VDC
6-30VAC
(IQ 35MA11 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. In this bulletin, communications link refers to a chain of
devices that are connected by a communications cable.
NOTES:
RS-485 Communications (Modbus and BACnet models only)
–
+
S
Red
Black
Gray
3.5
–4.4 in•lb
(0.4–0.5
N•
m)
Use 14-24 gauge wire
•
The terminal’s voltage and current ratings are compliant with the require-
ments of the EIA RS-485 communications standard.
•
The RS-485 transceivers are ¼ unit load or less.
•
RS-485+ has a 47 k
Ω
pull up to +5V, and RS-485- has a 47 k
Ω
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.
•
Use 14 to 24 gauge wire for all connections.
•
When tightening terminals, ensure that the correct torque is applied:
3.4-4.4 in·lb (0.4-0.5 N·m).
–
+
S
120
Ω
terminator on
the first and last de-
vice of the daisy chain
Belden 1120A or
equivalent
Shield wire
Pulse Contact Inputs (IQ 35MA15 Only)
The IQ 35MA15 has two inputs with pulse accumulators for solid state or mechanical contacts
in other sensors, such as water or gas flow meters. These inputs are isolated from the measured
circuits and referenced to the communication signal ground. Use with contacts that do not require
current to remove oxidation.
+ – S
+
~10 kΩ
Comm
Ground
4-10 VDC
nominal
Pulse Input
Contacts
Equivalent
Circuit
