Chapter 3
Chapter 3 I/O Modules 3-25
ADAM-4018
Figure 3-18
ADAM-4018 8-channel Thermocouple Input Module
Channels:
- six differential, two single-ended
Accepts:
- J, K, T, E, R, S and B thermocouples
- Millivolt inputs: ±15 mV, ±50 mV, ±100 mV and ±500 mV
- Volt inputs: ±1 V and ±2.5 V
- Current input: ±20 mA (requires a 125 Ω resistor)
The module forwards the data to the host computer in engineering units (
o
C,
mV, V, or mA)
ADAM-4018
CODE INPUT RANGE
00
01
02
03
04
DATA
ACQUISITION
MODULE
Vin 0+
Vin 0-
Vin 1+
Vin 5+
Vin 5-
Vin 6+
INIT*
(Y) DATA+
(G) DATA-
(R) +Vs
(B) GND
Vin 1-
Vin 4+
Vin 4-
AGND
INPUT:
Thermocouple
mV, V, mA
OUPUT:
RS-485
05
–15 mV
–60 mV
–100 mV
–500 mV
–1V
–2.5 V
Vin 7+
Vin 3-
Vin 3+
Vin 2-
Vin 2+
–20 mA
T/C J
T/C K
T/C T
T/C E
T/C R
T/C S
T/C B
06
DE
DF
10
11
12
13
14
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