User Manual

4.3.3 Module Interface
In order to implement communication application solutions, SAPHIR has two equivalent
module slots, which makes it very versatile with regard to connectivity, and enables it to
operate with a number of different communication busses.
The two module interfaces are connected directly to the microcontroller's
data/address/control bus.
The modules' hardware identifiers are read via an ID signal. This enables the operating
system software to automatically identify the inserted modules and start the respective
drivers.
As an additional power supply, the rectified 24 VAC prime power is brought out to the
module connector.
Pin assignment
The modules are connected using the X15 and X16 55-pin male connectors.
Module connector X15:
Pin No. X15A X15B X15C X15D X15E
1
+5 V +5 V +5 V +5 V +5 V
2
GND
GND GND GND GND
3
D0 D1 D2 D3 D4
4
D5
D6 D7 D8 D9
5
D10 D11 D12 D13 D14
6
D15
A1 A2 A3 A4
7 A5 A6 A7 A8 A9
8 A10
A11 A12 A13 A14
9
WR_N SWRES_N RD_N READY_N ID (P3.6)
10
ALE HWRES_N CS_N I/O_0 (P2.9) I/O_1 (P2.10)
11
+26…35 V +26…35 V +26…35 V +26…35 V +26…35 V
Module connector X16:
Pin No. X16A X16B X16C X16D X16E
1
+5 V
+5 V +5 V +5 V +5 V
2 GND GND GND GND GND
3 D0 D1 D2 D3 D4
4 D5 D6 D7 D8 D9
5 D10
D11
D12 D13 D14
6 D15 A1 A2 A3 A4
7 A5 A6 A7 A8 A9
8 A10 A11 A12 A13 A14
9 WR_N SWRES_N RD_N READY_N ID (P3.6)
10 ALE HWRES_N CS_N I/O_2 (P2.11) I/O_3 (P2.12)
11
+26…35 V +26…35 V +26…35 V +26…35 V +26…35 V
15/42
Siemens Building Technologies Hardware Description CE2P3689en
HVAC Products Hardware 25.11.2004