8 4 2 1
1 0 1 0
10*
No
. of monitored SPDs
Off
22
21
+/- d.c.
-/+ d.c.
*)
!
!
4. Wiring
Remote signalling contact (FM)
Galvanically isolated switch contact
integrated in the DRC SCM XT
monitoring module
max. 350 V d.c. / 120 mA
250 V a.c. / 70 mA
Pin: 21-22 break contact (nc)
Voltage supply
U
N
18...48 V d.c.; max. 100 mA
Pin: +/-; -/+
Recommendation DEHN:
power sypply unit
PSU DC24 30W
(Part No. 910 499)
*) switch contact shown in its normal state (all monitored SPDs are OK), that is supply
voltage is applied and the DRC SCM XT module is plugged in.
Observe the technical data of the remote signalling contact (see also 10.)!
max. 2.5 mm²
AWG 14
size 0
max. 0.4 Nm
3.5 in-Ibs
Note on use in Ex (i) circuits:
Single-core, non-sheathed cables of intrinsically and non-intrinsically safe circuits routed together in conductor bundles or cable
ducts must be separated by an intermediate layer of insulating material or an earthed metal intermediate layer in accordance
with EN 60079-14. Separation is not required if sheathed cables or cable shields are used in intrinsically and non-intrinsically
safe circuits.
5. Configuration
Decimal
Binary
Select number of
SPDs to be monitored
(max. 10)
Attach
label
for preset
SCM address (BA1)
DEHNrecord
DRC SCM XT
The module must be
removed for configuration!
DIP switch
0 = Off
1 = On
On
*) example
Page 4
Quick Guide DEHNrecord
DRC SCM XT
Decimal
Binary code
Value
8 4 2 1
1
⇔
0
0 0 1
2
⇔
0 0 1 0
3
⇔
0 0 1 1
4
⇔
0 1 0 0
5
⇔
0 1 0 1
6
⇔
0 1 1 0
7
⇔
0 1 1 1
8
⇔
1 0 0 0
9
⇔
1 0 0 1
1 0
⇔
1 0 1 0
