Operating instructions
EXD-SH1/2 Controller with ModBus communication
capability for electrical control valves
Emerson Climate Technologies GmbH www.climate.emerson.com/en-gb Date: 29.07.2020
Am Borsigturm 31 I 13507 Berlin I Germany EXD-SH12_OI_EN_DE_FR_IT_PL_RU_0720_R04_865917.docx
Wiring options: UPS (ECP-024) /Supercap (EXD-PM)
Warning:
• Use a class II category transformer for 24VAC power supply. Do not ground
the 24VAC lines. We recommend using individual transformers for EXD-
SH1/2 controller and for third party controllers to avoid possible interference
or grounding problems in the power supply.
• If EXD-PM is connected, it is mandatory to have individual transformer for
EXD-SH… and EXD-PM.
Circuit 1 (EXD-SH1/SH2)
14-17
Electrical control valve circuit 1 (ECV1)
EXV-M… Electrical plug: wire colors
WH-white BK-black BL-blue BN-brown
*) Parameter 2uP with No. 8 = only pressure
sensor circuit 1 is used
19-22
Electrical control valve circuit 2 (ECV2)
EXV-M… Electrical plug: wire colors
WH-white BK-black BL-blue BN-brown
1 and 7 Supply voltage 24 VAC/DC
2 and 8 Temperature sensor circuit 1 23 and 24 RS485 (+/-terminal)
3 and 8 Temperature sensor circuit 2 25 and 26
Alarm relay circuit 1 (C, NO) – Suitable for
24 VAC/DC
4 and 5
PT5N… circuit 1 & circuit 2 (white wire: 4 – 20 mA
signal)
27 and 28
Alarm relay circuit 2 (C, NO) – Suitable for
24 VAC/DC
9 + 12VDC Voltage input for PT5N… (brown wire) 29 and 30
Digital input circuit1 (DI1) – Dry contact,
potential free
Alternative ratiometric third Party Pressure Transmitter:
Warning: Read the note in the last page for limitation of
31 and 30
Digital input circuit 2 (DI2) – Dry contact,
potential free
4 and 5
Pressure transmitter circuit 1 & circuit 2
(0.5 - 4.5 V signal)
35 and36 Battery/Super capacitor connection terminal
11 + 5 VDC voltage input
Fuse: EXD-SH1 (1A), EXD-SH2 (2A)
10 GND Ground
Not used (Terminals on EXD-SH12)
two
-SH1
Two supercaps
for one EXD
-SH2
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