D300529 0115 - BL67 I/O modules
6-3
Overview
6.1 Overview
Analog input modules (AI) detect standard electrical signals at the connections of the base modules,
digitalize them and transmit the corresponding measurement values to the gateway via the internal
module bus.
The sensor supply (V
sens
) is tapped from the internal voltage supply bus.
This voltage is supplied by the gateway or a Power Feeding module.
Both contain a short circuit detection for the sensor supply voltage.
The module bus electronics of the analog input modules are galvanically isolated from the field level
via an opto-coupler. The module provides reverse polarity protection.
Supported signal ranges
BL67-2AI-I:
0 to 20 mA
4 to 20 mA
BL67-2AI-V:
0 to 10 VDC
-10 to 10 VDC
Connectable sensors
BL67-2AI-PT
platinum sensors Pt100, Pt200, Pt500, Pt1000
nickel sensors (Ni100, Ni1000)
BL67-2AI-TC
thermo elements (Types: B, E, J, K, N, R, S, T)
LED displays
Error signals from the I/O level are indicated by each module via the "D" LED. The corresponding diag-
nostic information is transmitted to the gateway via diagnostic bits.
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