I-Gard DSP-OHMNI, Manual

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3. INSTALLATION
A typical installation will include for each power source (transformer/generator) 1 DSP-TDM, 1 DSP-DCM, 1 DSP-DPS,
1 DSP-DSM, 1 DSP-DRM and a number of DSP-DFM feeder modules as required with 1 for each branch protected.
Additionally there will be a DSP-OHMNI-PM pulsing resistor to ground the system. A voltage-sensing resistor DDR2 is
required for the DSP-DSM input, as well as one current sensor for each DSP-DFM for current detection. See Table 2
for typical requirements.
Catalogue Number Description Number Required/System
DSP-TDM Display Module 1 (part of DSP-DSYS/v2)
DSP-DCM Converter Module 1 (part of DSP-DSYS/v2)
DSP-DPS/v2 Power Supply 1 (part of DSP-DSYS/v2)
DSP-DSM/v2 System Voltage Module 1 (part of DSP-DSYS/v2)
OHMNI-PM Pulse Equipped Resistor 1
DDR2 Voltage Sensing Resistor 1
Table 3: Optional Modules
Catalogue Number Description Number Required /System
DDAI Artificial Neutral Required only for delta system
DSP-DFM/v2 Feeder Module As required 1/circuit(feeder)
TxA or Rx-yA Toroidal Current Sensor 1/feeder module
DSP-ADM Arc Detection Module 1 required for arc detection application
DSP-CA Cable adapter module 1 required for Main-Tie-Main applications
DSP-CAS Cable adapter module (switch) 1 required for Main-Tie-Main applications
Table 4: Standard Ribbon Cables
Length Function Catalogue Number
5cm (2 in.) Module to Module connection RC-3
30cm (12 in.) Module to Module connection RC-30
DSP modules are mounted on a 35mm DIN rail generally located at the rear wall of a switchgear compartment. They
should be mounted side by side and connected with 20-conductor ribbon cable in a daisy chain configuration. This ap -
plies to the DSP-DPS, DSP-DSM and DSP-DFM modules only. DSP (outline dimensions). Care should be taken not to
over tighten the 8-32 nuts used to retain the DSP-TDM.
It will be necessary to provide a reliable power source (which is not interrupted by operation of the DSP output con-
tacts) for control power. The supply should be in the range of 120V to 240V AC, 50/60Hz or 125V DC up to 250V. The
control supply must be fused by a 1 ampere fuses as shown in Fig. 5 (Connection Diagram).
Table 2: System Module Requirements