Micromod MOD: 30ML Installation - Manual (Page 65)

MOD 30ML Multiloop Controller
MODULAR I/O CONNECTIONS
4.3.4 2002A and 2012A Current Inputs (VCIM)
Make current input connections as shown in Figure 4-5 for 2-Wire Transmitter (2012A) and in
Figure 4-6 for Non 2-Wire Transmitter (2002A).
2-Wire Transmitter (2012A)
The 2-wire version of the milliampere input receives its loop current from a 24V dc current
supply built into the module. This current supply is automatically connected in the circuit
when the 2-wire input connection is made. The load on the transmitter is nominally 100
ohms. Due to heat generated, this module must be installed in a location with no adjacent
module on either side. Input specifications are:
ANALOG INPUT (CURRENT WITH 2-WIRE TRANSMITTER POWER)
Range: (0-100%) 4 to 20mA
Low limit: 0 mA
Upper limit: 27.5 mA
Input Resistance: 50 ohms
Noise filter: 3 db at 5 Hz
Resolution: 14 bits
Sensitivity: 1 uA
Accuracy (calibrated): ±0.2% of span
Two Wire Excitation Supply
Open circuit voltage: 24V ±5%
Short circuit current: maximum at 38 mA
Isolation: 250 Vrms
Max Survivable Input: ±300 Vdc or 250 Vac (Differential)
Common mode rejection: 100 db at 60 Hz minimum
Normal mode rejection: 40 db at 60 Hz minimum
Figure 4-5. Typical Connections for a 2012A Current Input Module with 2-Wire Transmitter Power
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