GEMARK* VIE CONTROL PRODUCT DESCRIPTION

• TC designates thermocouples

• RTD designates resistance temperature device

Analog I/O modules typically contain 10 analog inputs and 2 analog outputs. 8 inputs can be configured for 

1-5Vdc, ±5Vdc, ±10Vdc, or 0-20ma with jumpers on the module, and the remaining 2 inputs can be configured for 

0-20ma or +/-1ma with 250 Ω / 5,000 Ω burden resistors respectively. For applications with a high concentration 

of analog outputs, dedicated output modules are available for 0-20ma and others for 0-20ma / 0-200ma selection 

for valve actuators (800 Ω / 50 Ω output loads respectively). Transducers can be externally powered (differential 

inputs) or internally powered from the I/O module with +24Vdc current limited per point. I/O modules are available 

with point isolation for externally powered transducers.

In general, RTDs are useful for precision temperature measurements below 800°C, and thermocouples are cost 

effective devices for monitoring a wider temperature range. RTD modules provide a 10 ma multiplexed excitation 

current to each RTD, which can be grounded or ungrounded. They support 100 and 200 Ω platinum, 10 Ω copper, 

and 120 Ω nickel 3-wire RTDs with software linearization per point. The linearization includes scaling for specific 

RTD standards such as a MINCO-CA or CU10 10 Ω copper RTDs. RTDs can be located up to 300 meters (984 

feet) from the I/O module with a maximum two-way cable resistance of 15 Ω.