RMG TME 400-VM Operating Manual page 43

2 Installation
39
Figure 5: Connection assignment of the TME 400
However, assignments are possible; the pin assignments of the TME 400 are shown
in in Figure 5: Connection assignment of the TME 400. If, for example, the TME 400
is to be used as a "flow sensor", the current must be connected to 4..20 mA (termi-
nal block X9). The 4..20 mA current is then connected to the two terminals. For this
function, the optional current module must be plugged in at the top left (see Figure 4:
Electronics with cover of the calibration button).
The "sensor" TME 400 is passive, it is fed and limits the current to the corresponding
value. With this use, the current serves as an additional current supply (see chapter
1.3.4 Power supply). Here, care must be taken to ensure that this power supply is
galvanically isolated.
If digital communication with the TME 400 is required, it can be connected to the
RS485. The differential signals are obtained via data lines A and B under RS485
(terminal block X6). Please pay attention to crossed signal lines and change the
connections if appropriate. If necessary, the data interface can be conditioned using
a jumper. Normally, the resistance is infinitely large (ꝏ Ω); for a point-to-point con-
nection or if the terminal device is part of a bus system, the resistance must be set to
120 Ω.
Manual TME400-VMF · EN11 · January 22nd, 2024