Instructions

9
9. GSM Module Connections
1 Operating voltage connection
2 Analogue input „ADC“
3 Temperature sensor input „T1“ and „T2“
4 Digital input „INV“
5 Digital input „DEL“
6 Two digital inputs „LOG“
7 Two digital inputs „IN1“ and „IN2“
8 „Incall“ output
9 „SMS1“ to „SMS4“ output
10 „TMP1“ to „TMP4“ output
11 Output „ALA“
12 Output „FLS“ (no function)
13 Output „INV“
14 Output „DEL“
15 Output „LOG“
16 USB Connection
17 LED-display for GSM function
18 Connection for GSM aerial
Description of the Connections:
1 Connection for the operating voltage of 5 to 30 V/DC. Minus/- is connected to the left screw terminal and Plus/+ to the right terminal. Never
connect a higher voltage and always observe polarity!
2 Connection for the analogue input to measure a voltage of 0 to 14 V/DC. The input signal is connected to the centre screw terminal and the
Minus/- to the right terminal. 4 V/DC are applied to the left terminal.
3 Connection for both temperature sensors (Conrad item no. 198896): Plus/+ (white) is connected to the left screw terminal, the signal (red)
to the centre and Minus/- (black) to the right screw terminal.
Inputs (see figure 1, items 4 to 7):

Minus/- is connected to the left screw terminal and Plus/+ to the right terminal.
Observe the maximum input voltage of 12 V/DC at the optocoupler inputs (as of approx. 2.5 V/DC, the digital input signal is recognised
as „High“).
4 Connection for the digital inverter input („INV“)
5 Connection for the digital delay input („DEL“)
6 Connection for the two digital logic inputs („LOG“)
7 Connection for the two digital optocoupler inputs („IN1“/„IN2")
Figure 1